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#author("2025-04-04T13:25:05+09:00","hikari","hikari")
#author("2025-04-04T13:26:04+09:00","hikari","hikari")
//* Nobuko Naka [#ecbf2c43]

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&size(14){''中　暢子''};~
京都大学 大学院理学研究科 物理学・宇宙物理学専攻 ~
物理学第一分野  教授

略歴：静岡県生まれ。
東京大学理学部物理学科卒業、同大学院理学系研究科修士課程修了。
同大学院理学系研究科助手、理化学研究所基礎科学特別研究員、
東京大学大学院工学系研究科特任講師、京都大学大学院理学研究科准教授を経て2023年4月より現職。
2008年10月より2012年3月まで科学技術振興機構さきがけ研究員を兼務。
2013年8月より2015年7月まで文部科学省学術調査官を併任。~

学位：博士（理学）(東京大学2003年)
「Two-photon spectroscopy on excitons in strain-induced traps in Cu2O」~
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***専門分野：光物性物理学 [#uaac7a1f]
***所属学会：日本物理学会 [#k4b8634d]
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***連絡先 [#j7df7b17]
e-mail: naka@...(add scphys.kyoto-u.ac.jp after @)~
居室：吉田キャンパス北部構内理学研究科5号館1階120号室

#br
***外部資金 [#t57d6bd6]
科研費 基盤研究（B）(R4-R7) 固体リドベルグ状態を用いる量子技術の開拓（代表）

#br

** Publications [#cf93da8a] 
+Ikuko Akimoto, Takayuki Suzuki, Nobuko Naka, and Hideto Matsuoka: Cyclotron resonance imaging at cryogenic temperatures enabled by electric field modification in a microwave cavity, J. Phys. D: Appl. Phys. 58 (2025) 025309-1-8.
+Shinya Takahashi, Yoshiki Kubo, Kazuki Konishi, Riadh Issaoui, Julien Barjon, and Nobuko Naka: Spin-Orbit Effects on Exciton Complexes in Diamond, Phys. Rev. Lett. 132 (2024) 096902-1-6. EurekAlert! 
https://www.eurekalert.org/news-releases/1035725
ブルーダイヤモンドの謎を解く―アクセプタに束縛された励起子のスピン・軌道自由度の役割―
https://www.kyoto-u.ac.jp/ja/research-news/2024-02-27
+中暢子：ダイヤモンドの光物性研究（解説）, 応用物理93 (2024) 68-74.
+Nobuko Naka: Investigating Planar Polyexcitons: Trimers and Tetramers Glued by “Chemical Bonds”, JPSJ News and Comments 20 (2023) 13-1-2.
+J. Omachi, N. Naka, K. Yoshioka, and M. Kuwata-Gonokami: Mid-infrared dielectric response of Fermi-degenerate electron-hole droplets in diamond, Phys. Rev. B 106 (2022) 235205-1-11.
+Mitsuyoshi Takahata and Nobuko Naka: A Solid Observation of Strong Kerr Nonlinearity (Viewpoint), Physics 15 (2022) 139-1-3.
+小西一貴、秋元郁子、中暢子：講座（連載30） ダイヤモンドをよく知るために -ダイヤモンドの光物性計測（3）発光と内部量子効率, New Diamond vol. 145, pp. 37-41（2022年4月）.
+K. Konishi, I. Akimoto, H. Matsuoka, J. Isberg, and N. Naka: Intrinsic Mobility of Low-Density Electrons in Photoexcited Diamond, Phys. Rev. Appl. 17 (2022) L031001-1-6. 
+秋元郁子、濱端沙耶香、中暢子：講座（連載30） ダイヤモンドをよく知るために -ダイヤモンドの光物性計測（2）励起子と電荷キャリヤの共存状態, New Diamond vol. 144, pp. 43-47 （2022年1月）.
+Report on the 49th AAPPS Video Council Meeting by AAPPS (News and Views) AAPPS Bulletin (2022) 32:32 pp. 124-128.
+Report on the 48th AAPPS Video Council Meeting by AAPPS (News and Views) AAPPS Bulletin (2022) 32:32 pp. 119-123.
+Report on the 47th AAPPS Video Council Meeting by AAPPS (News and Views) AAPPS Bulletin (2022) 32:11 pp. 58-63.
+中暢子、小西一貴、秋元郁子：講座（連載30） ダイヤモンドをよく知るために -ダイヤモンドの光物性計測（1）基礎光学吸収過程, New Diamond vol. 143, pp. 34-37 （2021年10月）.
+Sayaka Hamabata, Junichi H. Kaneko, Nobuko Naka, and Ikuko Akimoto: Transient coexistence of excitons and charge carriers in high-purity diamond, Diamond Relat. Mater. 120 (2021) 108678-1-6.
+T. Ichii, N. Naka, and K. Tanaka: Rotational symmetry breaking on the Rydberg energy spectrum of indirect excitons in diamond studied by terahertz time-domain spectroscopy, Phys. Rev. B 104 (2021) 205201-1-9.
+Kazuki Konishi and Nobuko Naka: Phonon-assisted excitonic absorption in diamond,
Phys. Rev. B, 104 (2021) 125204-1-10.
+Satoshi Kusaba, Yoshiki Katagiri, Kenji Watanabe, Takashi Taniguchi, Kazuhiro Yanagi, Nobuko Naka, and Koichiro Tanaka: Broadband sum frequency generation spectroscopy of dark exciton states in hBN-encapsulated monolayer WSe2, Optics Express 29 (2021) 24629-1-17.
+Report on the 46th Video Council Meeting of AAPPS (News and Views) AAPPS Bulletin (2021) 31:24 pp. 10-15.
+Report on the 45th Video Council Meeting of AAPPS (News and Views) AAPPS Bulletin (2021) 31:24 pp. 6-10.
+Report on the 44th AAPPS Video Council Meeting Part II, December 1, 2020 (News and Views) AAPPS Bulletin (2021) 31:7 pp. 7-11.
+Report on the 44th AAPPS Video Council Meeting Part I, December 1, 2020 (News and Views) AAPPS Bulletin (2021) 31:7 pp. 4-7.
+K. Konishi, I. Akimoto, H. Matsuoka, V. Djurberg, S. Majdi, J. Isberg, and N. Naka: Low-temperature mobility-lifetime product in synthetic diamond, Appl. Phys. Lett. 117 (2020) 212102-1-5.
+K. Konishi, I. Akimoto, J. Isberg, and N. Naka: Diffusion-related lifetime and quantum efficiency of excitons in diamond, Phys. Rev. B 102 (2020) 195204-1-6.
+T. Ichii, Y. Hazama, N. Naka, and K. Tanaka: Study of detailed balance between excitons and free carriers in diamond using broadband terahertz time-domain spectroscopy, Appl. Phys. Lett. 116 (2020) 231102-1-5 (selected as a Featured Article).
+Nobuko Naka: Report on the 43rd Video Council Meeting of AAPPS (Society News),
AAPPS Bulletin 30-5 (2020) 50.
+中暢子: 日本物理学会の国際連携とオンライン化に思うこと, 日本物理学会誌 75-9 (2020) 547. 
+山本卓、鈴木真理子、中暢子: Hasselt Diamond Workshop 2020-SBDD XXV, New Diamond vol. 137, pp. 42 （2020年4月）.
+Y. Kubo, M.Takahata, S. Temgoua, R. Issaoui, J. Barjon, and N. Naka: Phonon-assisted transitions of bound excitons in diamond: analysis by mirror symmetry, Phys. Rev. B 101 (2020) 205204-1-4.
+中暢子、下村尊明、秋元郁子：光物性計測からわかるダイヤモンドのキャリア特性（科学解説）, New Diamond vol. 135, pp. 8-13 （2019年10月）.
+S. Hamabata, I. Akimoto, and N Naka: Temperature-dependent carrier injection routes under optical excitation in high-purity diamond crystals, J. Phys.: Conf. Ser. 1220 (2019) 012023-1-4.
+I. Akimoto and N. Naka: Intrinsic carrier parameters and optical carrier injection method in high-purity diamonds, IntechOpen (2019). DOI: 10.5772/intechopen.86002
+Y. Kubo, S. Temgoua, R. Issaoui, J. Barjon, and N. Naka: Radiative lifetime of boron-bound excitons in diamond, Appl. Phys. Lett. 114 (2019) 132104-1-4 (selected as an Editor's pick).
+Mitsuyoshi Takahata and Nobuko Naka:
Photoluminescence properties of the entire excitonic series in Cu2O,
Phys. Rev. B 98 (2018) 195205-1-10.
+Mitsuyoshi Takahata, Koichiro Tanaka, and Nobuko Naka: Superradiance-to-polariton crossover of Wannier excitons with multiple resonances, Phys. Rev. Lett. 121 (2018) 173604-1-6.
+T. Shimomura, Y. Kubo, J. Barjon, N. Tokuda, I. Akimoto, and N. Naka: Quantitative relevance of substitutional impurities to carrier dynamics in diamond, Phys. Rev. Mater. 2 (2018) 094601-1-7.
+Mitsuyoshi Takahata, Koichiro Tanaka, and Nobuko Naka: Nonlocal optical response of weakly confined excitons in Cu2O mesoscopic films, Phys. Rev. B
97 (2018) 205305-1-6.
+Florian Schoene, Heinrich Stolz, and Nobuko Naka: The phonon-assisted absorption of excitons in Cu2O, Phys. Rev. B 96 (2017) 115207-1-10.
+Tatsuya Kitamura, Mitsuyoshi Takahata, and Nobuko Naka: Quantum number dependence of the photoluminescence broadening of excitonic Rydberg states in cuprous oxide, J. Lumin. 192 (2017) 808–813.
+Ikuko Akimoto and Nobuko Naka: Two optical routes of cold carrier injection in silicon revealed by time-resolved excitation spectroscopy, Applied Physics Express 10 (2017) 061301-1-4 (selected for Spotlights). 
+中暢子、森本光、挾間優治、田中耕一郎: 高純度ダイヤモンドにおける励起子拡散のメカニズム（解説）, 光アライアンス   vol. 28, pp. 35-38 (2017年3月号).　
+Nobuko Naka, Hikaru Morimoto, and Ikuko Akimoto: Excitons and fundamental transport properties of diamond under photo-injection, Phys. Status Solidi A
213 (2016) 2551–2563 (Feature Article, selected for Front Cover).
+Hikaru Morimoto, Yuji Hazama, Koichiro Tanaka, and Nobuko Naka: Exciton lifetime and diffusion length in high-purity chemical-vapor-deposition diamond,
Diamond Relat. Mater. 63 (2016) 47-50.
+I. Akimoto, N. Naka, and N. Tokuda:
Time-resolved cyclotron resonance on dislocation-free HPHT diamond,
Diamond Relat. Mater. 63 (2016) 38-42.
+Hikaru Morimoto, Yuji Hazama, Koichiro Tanaka, and Nobuko Naka, Ultrahigh exciton diffusion in intrinsic diamond, Phys. Rev. B 92 (2015) 201202(R)-1-5. 
//#ref(Reference16_morimoto.pdf)
+Ikuko Akimoto, Yushi Handa, Katsuyuki Fukai, and Nobuko Naka:
High carrier mobility in ultrapure diamond measured by time-resolved cyclotron resonance, App. Phys. Lett. 105 (2014) 032102-1-4.
+Yuji Hazama, Nobuko Naka, and Heinrich Stolz:	
Mass-anisotropy splitting of indirect excitons in diamond, Phys. Rev. B 90 (2014) 045209-1-7.
+Sandhaya Koirala, Mitsuyoshi Takahata, Yuji Hazama,
Nobuko Naka, and Koichiro Tanaka: Relaxation of localized excitons by phonon emission at oxygen vacancies in Cu2O, J. Lumin. 155 (2014) 65-69.
+N. Naka, K. Fukai, Y. Handa, and I. Akimoto: Nanosecond cyclotron resonance in ultrapure diamond, J. Lumin. 152 (2014) 93-97.
+Yuji Hazama, Nobuko Naka, Makoto Kuwata-Gonokami, and Koichiro Tanaka: Resonant creation of indirect excitons in diamond at the phonon-assisted absorption edge, Europhys. Lett. 104 (2013) 47012-1-6.
+N. Naka, K. Fukai, Y. Handa, and I. Akimoto: Direct measurement via cyclotron resonance of the carrier effective masses in pristine diamond, Phys. Rev. B 88 (2013) 035205-1-5.
+J. Omachi, T. Suzuki, K. Kato, N. Naka, K. Yoshioka, and M. Kuwata-Gonokami: Observation of excitonic N-body bound states: polyexcitons in diamond, Phys. Rev. Lett. 111 (2013) 026402-1-5.
+N. Naka, I. Akimoto, and M. Shirai: Free-carrier generation by two-photon resonant excitation to the excitonic states in cuprous oxide, Phys. Status Solidi B 250 (2013) 1773-1776.
+Sandhaya Koirala, Nobuko Naka, and Koichiro Tanaka: Correlated lifetimes of paraexcitons and trapped excitons at oxygen vacancy in cuprous oxide, J. Lumin. 134 (2013) 524-527.
+Nobuko Naka and Junko Omachi: Trailing quantum phases in solids using light-matter interaction, Chapter 17 in "New Developments in Photon and Material Research" (NOVA Science Publishers, 2013) p.365-382.
+I. Akimoto, S. Torai, N. Naka, and M. Shirai: Temporal shift from magnetoplasma resonance to cyclotron resonance of photo-carriers generated from 1s-exciton in cuprous oxide crystal, Eur. Phys. J. B 85 (2012) 374-1-5.
+Heinrich Stolz, Rico Schwartz, Frank Kieseling, Sunipa Som, Maria Kaupsch, Siegfried Sobkowiak, and Dirk Semkat, Nobuko Naka, Thomas Koch, and Holger Fehske: Condensation of excitons in Cu2O at ultracold temperatures: experiment and theory, New J. Phys. 14 (2012) 105007-1-37. 
+Rico Schwartz, Nobuko Naka, Frank Kieseling, and Heinrich Stolz: Dynamics of excitons in a potential trap at ultra-low temperatures: paraexcitons in Cu2O, New J. Phys. 14 (2012) 023054-1-28.
+Nobuko Naka, Ikuko Akimoto, Masanobu Shirai, and Ken-ich Kan'no: Time-resolved cyclotron resonance in Cu2O, Phys. Rev. B 85 (2012) 035209-1-6.
+T. Shikama, N. Naka, and M. Hasuo: Observation of the A2D-X2Pi transition spectra of CD molecules under a magnetic field relevant to fusion plasmas, Journal of Quantitative Spectroscopy and Radiative Transfer 113 (2012) 294-298.
+Christian Sandfort, Jan Brandt, Christoph Finke, Dietmar Froehlich, and Manfred Bayer, Heinrich Stolz and Nobuko Naka: Paraexcitons of Cu2O in a strain trap and high magnetic fields, Phys. Rev. B 84 (2011) 165215-1-7.
+N. Naka, J. Omachi, H. Sumiya, K. Tamasaku, T. Ishikawa, and M. Kuwata-Gonokami: Density-dependent exciton kinetics in synthetic diamond crystals,
Phys. Rev. B 80 (2009) 035201-1-7.
+J. Omachi, N. Naka, K. Yoshioka, M. Kuwata-Gonokami: Formation control of electron-hole droplets in diamond by a weak pulse injection, Journal of Physics C: Conference Series 148 (2009) 012051-1-3.
+N. Naka, T. Kitamura, J. Omachi, and M. Kuwata-Gonokami: Low-temperature excitons produced by two-photon excitation in high-purity diamond crystals, Phys. Status Solidi B 245 (2008) 2676-2679.
+N. Naka, J. Omachi, and M. Kuwata-Gonokami: Suppressed formation of electron-hole droplets in diamond under a strain field, Phys. Rev. B 76 (2007) 193202-1-4. 
+Jan Brandt, Dietmar Froehlich, Christian Sandfort, Manfred Bayer, Heinrich Stolz, and Nobuko Naka: Ultranarrow optical absorption and two-phonon excitation spectroscopy of Cu2O paraexcitons in a high magnetic field, Phys. Rev. Lett. 99 (2007) 217403-1-4.
+N. Naka and N. Nagasawa: Bosonic stimulation of cold excitons in a harmonic potential trap in Cu2O, J. Lumin. 112 (2005) 11-16.
+Nobuko Naka, Satoshi Hashimoto, and Teruya Ishihara: Thin films of single-crystal cuprous oxide grown from the melt, Jpn J. App. Phys. 44 (2005) 5096-5101.
+Naoya Tajima, Jun-ichi Fujisawa, Nobuko Naka, Teruya Ishihara, Reizo Kato, Yutaka Nishio, and Koji Kajita: Photo-induced insulator-metal transition in an organic conductor α-(BEDT-TTF)2I3, Journal of the Physical Society of Japan 74 (2005) 511-514. (JPSJ Editors' Choice)
+J.T. Ye, N. Naka, Y. Morihara, Z.K. Tang, W.K. Ge, P. Shen, I. Kudryashov, and N. Nagasawa: Optical micro-characterization of single-wall carbon nanotubes extracted from AFI crystals by visible emission and Raman scattering, Jpn J. App. Phys. 43 (2004) 7354-7355.
+N. Nagasawa, H. Sugiyama, N. Naka, I. Kudryashov, Z.M. Li, and Z.K. Tang: Optical nano-tomography on photosensitive single-wall carbon nanotube arrays in Zeolite (AFI) crystals, Jpn J. App. Phys. 43 (2004) 868-871. 
+N. Naka and N. Nagasawa: Two-photon tomography of strain-induced potential wells of excitons in Cu2O, Phys. Rev. B 70 (2004) 155205-1-10.
+N. Naka and N. Nagasawa: Optical tracking of high-density cooled excitons in potential traps in Cu2O, Phys. Status Solidi B 238 (2003) 397-403.
+N. Naka and N. Nagasawa: Bosonic stimulation of cold 1s excitons into a harmonic potential minimum in Cu2O, Solid State Commun. 126 (2003) 523-525.
+Y. Kamada, N. Naka, S. Saito, N. Nagasawa, Z.M. Li, and Z.K. Tang: Photo-irradiation effects on electrical conduction of single wall carbon nanotubes in zeolite single crystals, Solid State Commun. 123 (2002) 375-378.
+N. Naka and N. Nagasawa: Nonlinear paraexciton kinetics in a potential trap in Cu2O under two-photon resonance excitation, Phys. Rev. B 65 (2002) 245203-1-5.
+Y. Kamada, N. Naka, N. Nagasawa, Z.M. Li, and Z.K. Tang: Photo-induced current-modulation in Zeolite crystals containing single wall carbon nanotubes, Physica B 323 (2002) 239-241.
+N. Nagasawa, H. Sugiyama, N. Naka, I. Kudryashov, M. Watanabe, T. Hayashi, I. Bozovic, N. Bozovic, G. Li, Z. Li, and Z.K. Tang: Visible emission of single-wall carbon nanotubes formed in micro-channels of Zeolite crystals, J. Lumin. 97 (2002) 161-167.
+N. Naka and N. Nagasawa: Two-photon diagnostics of stress-induced exciton traps and loading of 1s-yellow excitons in Cu2O, Phys. Rev. B 65 (2002) 075209-1-5.
+N. Naka and N. Nagasawa: Dynamics of paraexcitons generated in a 3D confined potential well by two-photon resonance excitation in Cu2O, J. Lumin. 94-95 (2001) 413-416.
+Y. Nakamura, N. Naka, and N. Nagasawa: Effects of wandering photons on the excitonic optical signals in Cu2O crystals, Phys. Rev. B 64 (2001) 075203-1-6.
+A. Mori, N. Naka, and N. Nagasawa: Effects of Rayleigh scattering on photovoltaic spectra associated with 1s orthoexcitons in Cu2O, Phys. Rev. B 63 (2001) 033202-1-4, ibid 169901(E)-1.
+N. Naka and N. Nagasawa: Two-photon spectroscopy on cold ortho-excitons in a stress trap in Cu2O crystals, J. Lumin. 87-89 (2000) 201-203.
+N. Naka and N. Nagasawa: Experimental study on two-photon oscillator strength of hydrogenic yellow excitons in Cu2O, Solid State Commun. 116 (2000) 417-419.
+N. Naka and N. Nagasawa: High precision two-photon spectroscopy on emission of 1s ortho- excitons in Cu2O, Solid State Commun. 110 (1999) 153-157.
+N. Naka, M. Hasuo, and N. Nagasawa: Two-photon photo-voltaic spectroscopy on Wannier excitons in Cu2O, Physics of the Solid State 40 (1998) 847-849.
+S. Kono, N. Naka, M. Hasuo, S. Saito, T. Suemoto, and N. Nagasawa: Coherent optical processes of 1s ortho-excitons in Cu2O by two-photon excitation, Solid State Commun. 97 (1996) 445-458.
+N. Naka, S. Kono, M. Hasuo, and N. Nagasawa: A new aspect of the Bose-Einstein condensation of 1s-exciton system in Cu2O, Prog. in Crystal Growth and Charact. 33 (1996) 89-92.

** Invited talks [#n34d406b]
+K. Konishi, R. Ikebe, D. Totsuka, R. Toda, I. Akimoto, H. Matsuoka, J. Isberg, and N. Naka: Intrinsic carrier mobility in CVD-grown single-crystal diamond, MRS Fall Meeting (Boston, USA, December 2024).
+Nobuko Naka: Rydberg Exciton States in Diamond, 7th International Workshop on Rydberg Excitons in Semiconductors (Dortmund, Germany, July 2024).
+Nobuko Naka: Fundamental Optical Properties of Excitons in Diamond, The 20th International Conference on Luminescence (Paris, France, August 2023).
+中 暢子: ダイヤモンドの光物性, 第83回応用物理学会秋季学術講演会 (September 2022). 
+K. Konishi, I. Akimoto, H. Matsuoka, V. Djurberg, S. Majdi, J. Isberg, and N. Naka: Diffusion-related lifetime of photoexcited carriers in ultrapure diamond, MRS Spring Meeting 2022 (May 2022).
+K. Konishi, I. Akimoto, H. Matsuoka, V. Djurberg, S. Majdi, J. Isberg, and N. Naka: Diffusion-related lifetime of photoexcited carriers in ultrapure diamond, MRS Spring Meeting (May 2022).
+N. Naka, Bound excitons in diamond: Revisit by absorption spectroscopy, International Conference on Diamond and Carbon Materials (ICDCM2021) (September 2021).
+N. Naka, T. Shimomura, Y. Kubo, J. Barjon, N. Tokuda, and I.Akimoto: Dynamics of photoexcited carriers and excitons in diamond, 14th International Conference on New Diamond and Nano Carbons 2020/2021 (June 2021).
+Nobuko Naka and Mitsuyoshi Takahata: Rydberg excitons in Cu2O: from bulk to mesoscopic dimensions,
Super Symposium on Rydberg Quantum Technologies, CLEO (May 2021).
+Nobuko Naka and Mitsuyoshi Takahata: Rydberg excitons in semiconductor Cu2O with bulk and mesoscopic dimensions, Fundamental Optical Processes in Semiconductors (FOPS) 2019, (Banff, Canada, August 2019).
+Nobuko Naka and Mitsuyoshi Takahata: Photoluminescence of Rydberg excitons in Cu2O, 3rd International Workshop on Rydberg Excitons in Semiconductors (Durham, UK, July 16, 2019).
+Nobuko Naka and Ikuko Akimoto: Optical injection of valley-polarized electrons
in group IV semiconductors, EXCON2018 (Nara, Japan, July 13, 2018).
+Nobuko Naka, Hikaru Morimoto, and Ikuko Akimoto: Excitons and fundamental properties of diamond, Hasselt Diamond Workshop SBDD-XXI (Hasselt, Belgium, March 9, 2016).
+Nobuko Naka, Yuji Hazama, and Ikuko Akimoto: Excitons and carrier effective masses in intrinsic diamond, International Conference on Diamond and Carbon Materials (Madrid, Spain, September 10, 2014).
+Ikuko Akimoto and Nobuko Naka: Momentum relaxation times for optically excited delocalized electrons and holes in pristine diamond, Awaji International Workshop on “Electron Spin Science & Technology: Biological and Materials Science Oriented Applications” (Awaji, Japan, June 17, 2014).
+Nobuko Naka: Polyexcitons and electron-hole droplet condensation in diamond,
7th International Conference on Spontaneous Coherence in Excitonic Systems
(Hakone, Japan, April 22, 2014).
+N. Naka: Strain confined excitons in Cu2O, 2nd International Conference on Spontaneous Coherence in Excitonic Systems (Southampton, UK, September 2005).
+N. Naka and N. Nagasawa: Bosonic stimulation of cold excitons in a harmonic potential trap in Cu2O, 6th International Conference on Excitonic Processes in Condensed Matter (Cracow, Poland, July 2004).
+N. Naka and N. Nagasawa: Optical tracking of high-density cooled excitons in potential traps in Cu2O, 7th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors (Karlsruhe, Germany, February 2003).
+N. Nagasawa, H. Sugiyama, N. Naka, I. Kudryashov, M. Watanabe, T. Hayashi, I. Bozovic, N. Bozovic, G. Li, Z. Li, and Z.K. Tang: Visible emission of single-wall carbon nanotubes formed in micro-channels of zeolite crystals, International Conference on Dynamical Processes in Excited States of Solids (Lyon, France, July 2001).
+N. Naka, M. Hasuo, and N. Nagasawa: Two-photon photo-voltaic spectroscopy on Wannier excitons in Cu2O, International Conference on Optics of Excitons in Condensed Matter, dedicated to the 100th anniversary of Professor E.F. Gross (St. Petersburg, Russia, September 1997).

** Seminar and talks [#y0d123d2]
+Daiki Totsuka, Kazuki Konishi, Rintaro Toda, Jan Isberg, and Nobuko Naka: Drift force around dislocations affecting the luminescence quantum efficiency of excitons in CVD diamond, Hasselt Diamond Workshop SBDD-XXVIII (Hasselt, Belgium, March 1, 2024).
+Kazuki Konishi, Rintaro Toda, and Nobuko Naka: Effect of Rydberg exciton states on the optical spectrum of diamond, Hasselt Diamond Workshop SBDD-XXVII (Hasselt, Belgium, March 15, 2023).
+I. Akimoto, S. Hamabata, J. H. Kaneko, and N. Naka: Exciton binding energy in diamond measured by time-resolved cyclotron resonance, 15th International Conference on New Diamond and Nano Carbons 2022 (June 2022).
+S. Hamabata, J. H. Kaneko, N. Naka, and I. Akimoto: Transient coexistence of excitons and charged carriers in high-purity diamond, 14th International Conference on New Diamond and Nano Carbons 2020/2021 (June 2021).
+Tomoaki Ichii, Nobuko Naka, and Koichiro Tanaka: Fine structure of excitonic excited states in diamond studied by broadband terahertz time-domain spectroscopy, The 45th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz2020) (November 2020).
+K. Konishi, I. Akimoto, H. Matsuoka, J. Isberg, and N. Naka: Surface recombination model for electron lifetime in intrinsic diamond, Hasselt Diamond Workshop SBDD-XXV (Hasselt, Belgium, March 13, 2020).
+Y. Kubo, M. Takahata, S. Temgoua, R. Issaoui, J. Barjon, and N. Naka: Phonon replicas of bound excitons in boron-doped diamond, Hasselt Diamond Workshop SBDD-XXV (Hasselt, Belgium, March 12, 2020).
+Y. Kubo, S. Temgoua, R. Issaoui, J. Barjon, and N. Naka: Radiative lifetime of boron-bound excitons in diamond studied by ultraviolet absorption, Hasselt Diamond Workshop SBDD-XXIV (Hasselt, Belgium, March 15, 2019).
+ N. Naka, Excitonic luminescence in Cu2O with bulk and mesoscopic dimensions,
(EIIa Seminar, Technical University of Dortmund, March 11, 2019).
+M. Takahata, K. Tanaka, and N. Naka: Excitonic response beyond the long-wavelength approximation in Cu2O mesoscopic films, EXCON2018 (Nara, Japan, July 9, 2018).
+N. Naka, S. Hamabata, K. Konishi, J.H. Kaneko, and I. Akimoto: Time-resolved spectroscopy on intrinsic diamond for reassessment of the exciton binding energy, Hasselt Diamond Workshop SBDD-XXIII (Hasselt, Belgium, March 7, 2018).
+N. Naka, I. Akimoto, T. Shimomura, Ian Friel, and J. Isberg: Enhanced electron mobility in intrinsic diamond at cryogenic temperatures, Hasselt Diamond Workshop SBDD-XXII (Hasselt, Belgium, March 10, 2017).
+Ikuko Akimoto and Nobuko Naka: Exciton interband relaxation observed by
time-resolved cyclotron resonance in diamond, 19th International Conference on Dynamical Processes in Excited States of Solids (Paris, France, July 21, 2016).
+Nobuko Naka: Free-carrier mobility and exciton diffusion in diamond, GEMaC Seminar (Versailles, France, March 15, 2016).
+I. Akimoto, N. Naka, and N. Tokuda: Time-resolved cyclotron resonance on dislocation-free HPHT diamond, 9th international conference on new diamond and nano carbons 2015 (Shizuoka, Japan, May 26, 2015).
+I. Akimoto, Y. Handa, K. Fukai, and N. Naka: High carrier mobility of diamond measured by cyclotron resonance, The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014) (Fukuoka, Japan, August 26, 2014).
+Nobuko Naka and Ikuko Akimoto: High-efficiency detection of free carriers via Auger ionization in wide-gap semiconductors, 
32nd international conference on the physics of semiconductors (Austin, Texas,
August 14, 2014).
+Nobuko Naka, Katsuyuki Fukai, Yushi Handa, and Ikuko Akimoto:
Nanosecond cyclotron resonance in ultrapure diamond,
18th International Conference on Dynamical Processes in 
Excited States of Solids (Fuzhou, China, August 6, 2013).
+Nobuko Naka: ナノ秒時間分解サイクロトロン共鳴：光物性研究への展開
(特別講義談話会，愛媛大学理学部，July 29, 2013).
+Yuji Hazama, Nobuko Naka, Makoto Kuwata-Gonokami, and Koichiro Tanaka:
Influence of the carrier lifetime on the phase diagram of electron-hole systems in diamond, The 18th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures	
(Matsue, Japan, July 23, 2013). 
+Nobuko Naka: The electron-hole liquid in diamond and cyclotron resonance in cuprous oxide, Vortrag in Rahmen des Optikseminars (Rostock, Germany, October 2, 2012).
+H. Stolz, R. Schwartz, F. Kieseling, S. Som, M. Kaupsch, S. Sobokowiak, D. Semkat, N. Naka, T. Koch, H. Fehske: Bose-Einstein condensation of excitons in Cu2O, 11th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors (Stuttgart, Germany, September 26, 2012).
+Nobuko Naka, Ikuko Akimoto, and Masanobu Shirai: Free-carrier generation by two-photon resonant excitation to the excitonic states in cuprous oxide, 11th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors (Stuttgart, Germany, September 24, 2012).
+Nobuko Naka: Low-temperature phases of electron-hole systems in diamond, DYCE International workshop (Kussharo, Japan, August 8, 2012).
+Nobuko Naka, Ikuko Akimoto, Shinji Torai, and Masanobu Shirai: Free-carrier generation by excitonic collisions studied by a time-resolved cyclotron resonance in cuprous oxide, 31st International conference on the physics of semiconductors (Zurich, Switzerland, July 30, 2012).
+Yuji Hazama, Nobuko Naka, Makoto Kuwata-Gonokami, and Koichiro Tanaka: Lifetime effect on the electron-hole-droplet formation in diamond, 10th International Conference on Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials (Groningen, Netherlands, July 2, 2012).
+Nobuko Naka, Ikuko Akimoto, and Masanobu Shirai: Exciton-exciton scattering studied by time-resolved cyclotron resonance, International Conference on Correlation Effects in Radiation Fields (Rostock, Germany, September 12, 2011).
+Rico Schwartz, Nobuko Naka, Dietmar Froehlich, Jan Brandt, Christian Sandfort, and Heinrich Stolz: Ultra low temperature thermodynamics and spectroscopy of excitons in cuprous oxide confined in potential traps, NOEKS10 (Paderborn, Germany, August 16, 2010).
+Hajime Hirabayashi, Nobuko Naka, Koichiro Tanaka, Makoto Kuwata-Gonokami: Three-dimensional Raman imaging of diamond nanotips, Yuri P. Svirko, and Alexander N. Obraztsov, International Workshop "Nanocarbon Photonics and Optoelectronics"(Koli, Finland, August 5, 2010).
+N. Naka, I. Akimoto, M. Shirai, and K. Kan’no: Cyclotron resonance in cuprous oxide studied in a time-resolved regime, ICPS2010 (Seoul, Korea, July 30, 2010).
+J. Omachi, T. Suzuki, N. T. Long, K. Yoshioka, N. Naka, and M. Kuwata-Gonokami: Mid-infrared dielectric response of electron-hole droplets in diamond, EXCON’10 (Brisbane, Australia, July 13, 2010).
+Nobuko Naka: 半導体における高密度電子正孔系の光制御 (光ナノサイエンス特別講義，奈良先端科学技術大学院大学物質創成科学研究科，November 10, 2009).
+Nobuko Naka: High-density electron-hole systems in an indirect-gap semiconductor (University of Konstanz, Germany, August 15, 2008).
+N. Naka, J. Omachi, T. Sakamoto, M. Kuwata-Gonokami, K. Tamasaku, T. Ishikawa and H. Sumiya: Decaytimes of free excitons in synthesized high-purity diamond crystals, NPO2008 (Joensuu, Finland, August 8, 2008).
+N. Naka, T. Kitamura, J. Omachi, and M. Kuwata-Gonokami: Low-temperature excitons produced by two-photon excitation in high-purity diamond crystals, EXCON08 (Kyoto, Japan, July 24, 2008).
+E. Chae, K. Yoshioka, T. Ideguchi, N. Naka and M. Kuwata-Gonokami: Cu2O paraexcitons in a strain-induced trap probed by excitonic Lyman spectroscopy, EXCON08 (Kyoto, Japan, July 24, 2008).
+Nobuko Naka: High-density electron-hole systems in direct and indirect-gap semiconductors  (University of Rostock, Germany, October 24, 2007).
+N. Naka: High-density electron-hole systems in direct-gap and indirect-gap semiconductors, International mini-symposium on high-density excitation of excitons in Cu2O: Chances for Bose-Einstein condensation? (Dortmund, Germany, July 30, 2007).
+Nobuko Naka, Junko Omachi, and Makoto Kuwata-Gonokami: Suppressed formation of electron-hole droplets in diamond under strain, 71 Annual Meeting of the Deutsche Physikalische Gesellschaft (Regensburg, Germany, March 28, 2007).
+Nobuko Naka: High-resolution spectroscopy of excitons in cuprous oxide under magnetic field, Zernike Seminar (University of Groningen, Netherlands, March 6, 2007).
+N. Naka, J. Omachi, and M. Kuwata-Gonokami: Suppression of electron-hole-droplet phase in diamond by strain field, 3rd International Conference on Spontaneous Coherence in Excitonic Systems (Les Houches, France, January 17, 2007).
+N. Naka: Strain-confined excitons in cuprous oxide, EII Group seminar, (University of Dortmund, December 2, 2005). 
+N. Naka: Bosonic stimulation of cold excitons in a harmonic trap in Cu2O, Sonderseminar, Materialeigenschaften und Konzepte zur Quanteninformations- verarbeitung (University of Dortmund, July 2004).

//** Membership [#udd418f2]
//The Physical Society of Japan