SPring-8赤外ビームラインBL43IR

H. Okamura publication list
(1) Regular Papers, Letters, and Communications
(47) High-pressure electronic states in semiconductors studied by infrared spectroscopy: metallization and band gap tuning in Mg₂Si, InAs and InSb H. Okamura, H. Okazaki, K. Marugaku, S. Lee, T. Yoneda, H. Udono, Y. Mori, M. Maesato, H. Kitagawa, Y. Ikemoto, T. Moriwaki, Jpn. J. Appl. Phys. 64 (2025) 120801. (46) Similarities between Tetrahydrofuran Clathrate Hydrate After Pressure-Induced Amorphization and Aqueous Tetrahydrofuran Solution: An in-situ Raman and Infrared Spectroscopic Study N. Noguchi, H. Fujii, H. Okamura, Phys. Chem. Chem. Phys. 27 (2025) 12427. (45) Interband spectroscopy of Landau levels and magnetoexcitons in bulk black phosphorus H. Okamura, S. Iguchi, T. Sasaki, Y. Ikemoto, T. Moriwaki, Y. Akahama Phys. Rev. B 111 (2025) 125202. (44) Direct observation of pressure-induced amorphization of methane/ethane hydrates using Raman and infrared spectroscopy N. Noguchi, Y. Shiraishi, M. Kageyama, Y. Yokoi, S. Kurohama, N. Okada, H. Okamura, Phys. Chem. Chem. Phys. 25 (2023) 22161 (43) Pressure supression of the excitonic insulator state in Ta₂NiSe₅ studied by optical conductivity H. Okamura, T. Mizokawa, K. Miki, Y. Matsui, N. Noguchi, N. Katayama, H. Sawa, M. Nohara, Y. Lu, H. Takagi, T. Moriwaki, Y. Ikemoto, Phys. Rev. B 107 (2023) 045141. (42) Pressure Induced Spectral Redistribution Due to Te₂ Dimer Breaking in AuTe₂ D. Ootsuki, H. Okamura, S. Mitsumoto, Y. Ikemoto, T. Moriwaki, M. Arita, T. Yoshida, K. Kudo, H. Ishii, M. Nohara, T. Mizokawa. J. Phys. Soc. Jpn. 90 (2021) 114705. (41) Hybridization-gap Formation and Superconductivity in the Pressure-induced Semimetallic Phase of the Excitonic Insulator Ta₂NiSe₅ K. Matsubayashi, H. Okamura, T. Mizokawa, N. Katayama, A. Nakano, H. Sawa, T. Kaneko, T. Toriyama, T. Konishi, Y. Ohta, H. Arima, R. Yamanaka, A. Hisada, T. Okada, Y. Ikemoto, T. Moriwaki, K. Munakata, A. Nakao, M. Nohara, Y. Lu, H. Takagi, Y. Uwatoko, J. Phys. Soc. Jpn. 90 (2021) 074706. (Paper of Editors' Choice) (JPS Hot Topics) (40) Robust hybridization gap in the Kondo insulator YbB₁₂ probed by femtosecond optical spectroscopy A. R. Pokharel, S. Y. Agustsson, V. V. Kabanov, F. Iga, T. Takabatake, H. Okamura, J. Demdar, Phys. Rev. B 103 (2021) 115134. (39) Infrared and Raman Spectroscopic Study of Methan Clathrate Hydrates at Low Temperatures and High Pressures: Dynamics and Cage Occupancy of Methane N. Noguchi, T. Yonezawa, Y. Yokoi, T. Tokunaga, T. Moriwaki, Y. Ikemoto, H. Okamura J. Phys. Chem. C 125 (2021) 189-200. (38) Contrasting pressure evolution of f electron hybridized states in CeRhIn₅ and YbNi₃Ga₉: an optical conductivity study H. Okamura, A. Takigawa, T. Yamasaki, E. D. Bauer, S. Ohara, Y. Ikemoto, T. Moriwaki Phys. Rev. B 100, 195112 (2019). (37) Infrared spectroscopy on electronic structures of platinum-group metal pernitrides MN₂ (M = Ru, Rh, Ir, and Pt) K. Soda, M. Komabuchi, K. Maeguchi, M. Kato, T. Terabe, K. Niwa, M. Hasegawa, Y. Ikemoto, H. Okamura Physica B 558, 54 (2019). (36) Infrared spectroscopy techniques for studying the elctronic structures of materials under high pressure H. Okamura, Y. Ikemoto, T. Moriwaki, T. Nanba Jpn. J. Appl. Phys. 56 (2017) 05FA11. (35) Pressure dependence of far-infrared reflectance spectra in layered iron oxide LuFe₂O₄ T. Go, H. Okamura, G. Oohata, T. Nagata, T. Moriwaki, Y. Ikemoto, S. Mori, N. Ikeda, K. Mizoguchi Trans. Mat. Res. Soc. Jpn. 41 (2016) 109. (34) Emergence of charge degrees of freedom under high pressure in the organic dimer-Mott insulator β'-(BEDT-TTF)₂ICl₂ K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Moriwaki, S. Iguchi, M. Naka, S. Ishihara, T. Sasaki, Phys. Rev. B 92 (2015) 085149. (33) Improvement of infrared near-field spectrum by asymmetric interferometer onfiguration Y. Ikemoto, H. Okamura, T. Moriwaki, H. Suto, T. Kinoshita. Jpn. J. Appl. Phys. 54 (2015) 082402 (32) Pressure Supression of Spin-Density-Wave gap in the Optical Conductivity of SrFe₂As₂ H. Okamura, K. Shoji, M. Miyata, H. Sugawara, T. Moriwaki, Y. Ikemoto J. Phys. Soc. Jpn. 82 (2013) 074720. (31) Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions S. Kimura and H. Okamura J. Phys. Soc. Jpn. 82 (2013) 021004. (Special Topics "Frontier of Condensed Matter Physics using Synchrotron Radiation) (30) Pressure supression of unconventional charge-density-wave state in PrRu₄P₁₂ studied with optical conductivity H. Okamura, N. Ohta, A. Takigawa, I. Matsutori, K. Shoji, K. Miyata, M. Matsunami, H. Sugawara, C. Sekine, I. Shirotani, H. Sato, T. Moriwaki, Y. Ikemoto, Z. Liu, G. L. Carr Phys. Rev. B 85 (2012) 205115. (29) Broadband near-field mid-infrared spectroscopy and application to phonon resonances in quartz M. Ishikawa, M. Katsura, S. Nakashima, Y. Ikemoto, H. Okamura Opt. Express 20 (2012) 11064-11072. (28) Development of scattering near-field optical microspectroscopy apparatus using an infrared synchrotron radiation source Y. Ikemoto, M. Ishikawa, S. Nakashima, H. Okamura, Y. Haruyama, S. Matsui, T. Moriwaki, T. Kinoshita Opt. Commun. 285 (2012) 2212-2217. (27) Photoinduced dynamics in pure and Ca-doped SrTiO3 studied by transient birefringence and absorption measurements T. Kohmoto, Y. Koyama, T. Moriyasu, H. Okamura, Y. Yamada, K. Tanaka J. Phys. Soc. Jpn. 80 (2011) 104605. (26) Optical conductivity and electronic structure of CeRu₄Sb₁₂ under high pressure H. Okamura, R. Kitamura, M. Matsunami, H. Sugawara, H. Harima, H. Sato, T. Moriwaki, Y. Ikemoto, T. Nanba J. Phys. Soc. Jpn. 80 (2011) 084718. (25) Modulated near-field spectral extraction of broadband mid-infrared signals with a ceramic light source M. Ishikawa, M. Katsura, S. Nakashima, K. Aizawa, T. Inoue, H. Okamura, Y. Ikemoto Opt. Express 19 (2011) 12469. (24) Doping-induced ferroelectric phase transition in strontium titanate: Observation of birefringence and coherent phonons under ultraviolet illumination Y. Koyama, T. Moriyasu, H. Okamura, Y. Yamada, K. Tanaka, and T. Kohmoto Phys. Rev. B 81 (2010) 024104. (23) Pressure-tuning of an Ionic Insulator into a Heavy Electron Metal: An Infrared Study of YbS M. Matsunami, H. Okamura, A. Ochiai, T. Nanba Phys. Rev. Lett. 103 (2009) 237202. （Nature Asia-Pacific）（科学新聞）（SPring-8プレスリリース） (22) Charge transfer and dd excitations in transition metal oxides: q-dependent dielectric function study by inelastic X-ray scattering and optical reflectivity measurements N. Hiraoka, H. Okamura, H. Ishii, I. Jarrige, K. D. Tsuei, and Y. Q. Cai Eur. Phys. J. B 70 (2009) 157. (21) Combining photoemission and optical spectroscopies for Reliable Valence Determination in YbS and Yb Metal M. Matsunami, A. Chainani, M. Taguchi, R. Eguchi, Y. Ishida, Y. Takata, H. Okamura, T. Nanba, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, Y. Senba, H. Ohashi, N. Tsujii, A. Ochiai, S. Shin Phys. Rev. B 78, 195118 (2008). (Editors' Suggestion) (20) Universal scaling in the dynamical conductivity of heavy fermion Ce and Yb compounds H. Okamura, T. Watanabe, M. Matsunami, N. Tsujii, T. Ebihara, H. Sugawara, H. Sato, Y. Onuki, Y. Isikakwa, T. Takabatake, T. Nanba J. Phys. Soc. Jpn. 76, 023703 (2007). (Paper of Editors' Choice) (Introduced in JPSJ Online's "News and Comments") (19) Infrared study of valence transition compound YbInCu₄ using cleaved surfaces H. Okamura, T. Michizawa, T. Nanba, T. Ebihara Phys. Rev. B 75 041101(R) (2007). (SPring-8プレスリリース） (18) Photogenerated Carriers in SrTiO₃ Probed by Mid-Infrared Absorption H. Okamura, M. Matsubara, K. Tanaka, K. Fukui, M. Terakami, H. Nakagawa, Y. Ikemoto, T. Moriwaki, H. Kimura, T. Nanba J. Phys. Soc. Jpn. 75 023703 (2006). (17) Coupled charge-spin dynamics in the magnetoresistive pyrochlore Tl₂Mn₂O₇ probed using ultrafast mid-infrared spectroscopy R. P. Prasankumar, H. Okamura, H. Imai, Y. Shimakawa, Y. Kubo, S. A. Trugman, A.J. Taylor, and R.D. Averitt Phys. Rev. Lett. 95 267404 (2005). (16) Photoinduced spin crossover in Fe-picolylamine complex: A far-infrared study on single crystals H. Okamura, M. Matsubara, T. Nanba, T. Tayagaki, S. Mouri, K. Tanaka, Y. Ikemoto, T. Moriwaki, H. Kimura, G. Juhasz Phys. Rev. B 72, 073108 (2005). (15) Indirect and direct energy gaps in Kondo semiconductor YbB₁₂ H. Okamura, T. Michizawa, T. Nanba, S. Kimura, F. Iga, T. Takabatake, J. Phys. Soc. Jpn. 74, 1954 (2005) (14) Metal-insulator transition in PrRu₄P₁₂ and SmRu₄P₁₂ investigated by optical spectroscopy. M. Matsunami, L. Chen, M. Takimoto, H. Okamura, T. Nanba, C. Sekine, I. Shirotani Phys. Rev. B 72, 073105 (2005). (13) Carrier-induced magnetic circular dichroism in the magnetoresistive pyrochlore Tl₂Mn₂O₇. H. Okamura, T. Koretsune, T. Nanba, S. Kimura, H. Imai, Y. Shimakawa, Y. Kubo J. Phys. Soc. Jpn. 74, 970 (2005) (12) Pseudogap formation and heavy-carrier dynamics in intermediate-valence YbAl₃ H. Okamura, T. Michizawa, T. Nanba, T. Ebihara J. Phys. Soc. Jpn. 73, 2045 (2004). (11) Infrared study of spin-crossover Fe-picolylamine complex H. Okamura, M. Matsubara, T. Tayagaki, K. Tanaka, Y. Ikemoto, H. Kimura, T. Moriwaki, T. Nanba J. Phys. Soc. Jpn. 73, 1355 (2004). (10) Modification of vibrational selection rules in the photo-induced spin-crossover phase T. Tayagaki, K. Tanaka, H. Okamura Phys. Rev. B 69, 064104 (2004). (9) Gap formation in the filled Skutterudite CeOs₄Sb₁₂ M. Matsunami, H. Okamura, T. Nanba, H. Sugawara, H. Sato J. Phys. Soc. Jpn. 72, 2722 (2003). (8) Polarized Infrared Absorption in CdI₂:CN^- Crystals M. Terakami, H. Nakagawa, K. Fukui, H. Okamura, T. Hirono, Y. Ikeomoto, T. Moriwaki, H. Kimura J. Phys. Soc. Jpn. 72, 2128 (2003). (7) Charge dynamics in the colossal magnetoresistance pyrochlore Tl₂Mn₂O₇ H. Okamura, T. Koretsune, M. Matsunami, S. Kimura, T. Nanba, H. Imai, Y. Shimakawa, Y. Kubo Phys. Rev. B 64,180409(R) (2001). (6) Optical conductivity of Yb_1-xLu_xB₁₂: Energy gap and mid-infrared peak in diluted Kondo semiconductors H. Okamura, M. Matsunami, T. Inaoka, S. Kimura, T. Nanba, F. Iga, S. Hiura, J. Klijn, T. Takabatake Phys. Rev. B 62, R13265 (2000). (5) Pseudogap formation in the intermetallic compounds (Fe_1-xV_x)₃Al H. Okamura, J. Kawahara, T. Nanba, S. Kimura, I. Shimoyama, K. Nakagawa, K. Soda, U. Mizutani, Y. Nishino, M. Kato, K. Fukui, H. Miura, H. Nakagawa, Phys. Rev. Lett. 84, 3674 (2000). (4) Optical study of the metal-nonmetal transition in Ni_1-δS H. Okamura, J. Naitoh, T. Nanba, M. Matoba, M. Nishioka, and S. Anzai Solid State Communications, 112, 91 (1999). (3) Optical Conductivity of the Kondo insulator YbB₁₂: Gap formation and low-energy excitations H. Okamura, S. Kimura, H. Shinozaki, T. Nanba, F. Iga, N. Shimizu and T. Takabatake: Phys. Rev. B 58, R7496 (1998). (2) Inhibited Recombination of Charged Magneto-excitons H. Okamura, D. Heiman, M. Sundaram, and A.C. Gossard: Phys. Rev. B 58, R15985 (1998). (1) Luminescence spectra of Cr ions in Na_1-xK_x and Na_1-xTl_x β-alumina crystals H. Okamura and T. Hattori: Solid State Ionics 58, 77 (1992).
(2) Refereed Conference Papers and Proceedings
(47) Optical Conductivity Study of f Electron States in YbCu₂Ge₂ at High Pressures to 20 GPa H. Okamura, M. Nagata, A. Tsubouchi, Y. Onuki, Y. Ikemoto, T. Moriwaki Proceedings of the International Conference on Strongly Correlated Electron Systems (Okayama, September 2019). JPS Conf. Proc. 30 (2020) 011120. (46) Pressure Evolution of f electron hybridized state in CeCoIn₅ studied by optical conductivity H. Okamura, A. Takigawa, E. D. Bauer, T. Moriwaki, Y. Ikemoto Proceedings of the International Conference on Strongly Correlated Electron Systems (Grenoble, July 2014). J. Phys. Conf. Ser. 592 (2015) 012001. (45) Spatial and temporal dynamics of thermal and carrier diffusions in clathrate compounds T. Watanabe; T. Moriyasu; H. Okamura; K. Suekuni; T. Onimaru; T. Takabatake; T. Kohmoto, Proceedings of Conference on Lasers and Electro-Optics Pacific Rim (CLEOPR) (Kyoto, June 2013), DOI: 10.1109/CLEOPR.2013.6600587 (44) A Simple Method for the Kramers-Kronig Analysis of Reflectance Data Measured with Diamond Anvil Cell H. Okamura Proceedings of the International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources (Trieste, 2011) J. Phys. Conf. Ser. 359 (2012) 012013. (43) Suppression of Metal-Insulator Transition in PrRu₄P₁₂ under High Pressure Studied by Infrared Spectroscopy H. Okamura, I. Matsutori, A. Takigawa, K. Shoji, K. Miyata, M. Matsunami, H. Sugawara, H. Sato, C. Sekine, I. Shirotani, T. Moriwaki, Y. Ikemoto, T. Nanba Proceedings of the International Conference on Heavy Electrons (Tokyo, 2010) J. Phys. Soc. Jpn. 80 (2011) SA092. (42) Near-Field Spectroscopy with Infrared Synchrotron Radiation Source Y. Ikemoto, T. Moriwaki, T. Kinoshita, M. Ishikawa, S. Nakashima, and H. Okamura Proceedings of the 6th International Workshop on Nanoscale Spectroscopy and Nanotechnology (Kobe, 2010) e-Journal of Surf. Sci. and Nanotech. 9 (2011) 63-66. (41) Application of a Modulating Techniaue to Detect Near-Field Signals Using a Conventional IR Spectrometer with a Ceramic Light Source M. Ishikawa, M. Katsura, S. Nakashima, K. Aizawa, T. Inoue, Y. Ikemoto, H. Okamura Proceedings of the 6th International Workshop on Nanoscale Spectroscopy and Nanotechnology (Kobe, 2010) e-Journal of Surf. Sci. and Nanotech. 9 (2011) 40-45. (40) High pressure infrared studies of correlated electron materials using synchrotron radiation H. Okamura, M. Matsunami, R. Kitamura, A. Ochiai, H. Sugawara, H. Sato, T. Moriwaki, Y. Ikemoto, T. Nanba Proceedings of the International Conference on Infrared, Millimeter and Terahearts Waves (IRMMW-THz) (Roma, 2010)) 10.1109/ICIMW.2010.5612372 (39) Infrared Studies of f Electron Systems under High Pressure using Synchrotron Radiation H. Okamura, M. Matsunami, A. Ochiai, and T. Nanba Proceedings of the International Conference on High Pressure Science and Technology (Tokyo, July 2009). J. Phys. Conf. Ser. 215 (2010) 012051. (38) High Pressure Infrared Studies of Correlated Electron Materials at SPring-8 H. Okamura, R. Kitamura, M. Matsunami, T. Nanba, H. Sugawara, H. Sato Proceedings of the 5th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources (Banff, Canada, September 2009). AIP Conf. Ser. 1214 (2010) 75. (37) Photo-induced effect in quantum paraelectric materials: Transient birefringence measurement Y. Koyama, T. Moriyasu, H. Okamura, Y. Yamada, K. Tanaka, and T. Kohmoto Proceedings of the 8th International Conference on Excitonic Processes in Condesed Matter (EXCON'08) Phys. Stat. Sol. (c) 6 (2009) 248. (36) Optical Conductivity and Electronic Structures in Ce-Filled Skutterudites M. Matsunami, H. Okamura, K. Senoo, S. Nagano, C. Sekine, I. Shirotani, H. Sugawara, H. Sato, and T. Nanba Proceedings of the International Conference in New Quantum Phenomena in Skutterudite and Related Systems (Kobe, September 2007). J. Phys. Soc. Jpn. 77 (2008) Suppl. A, pp. 315. (35) Broad Band Infrared Near-Field Spectroscopy at Finger Print Region Using SPring-8 Y. Ikemoto, T. Moriwaki, H. Okamura, T. Sasaki, N. Yoneyama, A. Taguchi, Y. Inouye, S. Kawata, T. Kinoshita Proceedings of the 4th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Based Sources (Awaji, September 2007). Infrared Phys. Tech. 51, 417 (2008). (34) Probing nanoscale inhomogeneities in transition metal oxides with ultrafast mid-infrared spectroscopy Proceedings of the International Conference on Strongly Correlated Electron Systems (Houston, May 2007). R.P. Prasankumar, H.J. Lee, H. Okamura, H. Imai, Y. Shimakawa, Y. Kubo, S. Zvyagin, K. Kamenev, G. Balakrishnan, D. McK. Paul, S.A. Trugman, A.J. Taylor and R.D. Averitt Physica B 403, 1401 (2008). (33) Universal scaling in the optical conductivity of heavy fermion compounds H. Okamura, T. Watanabe, M. Matsunami, N. Tsujii, T. Ebihara, H. Sugawara, H. Sato, Y. Onuki, Y. Isikakwa, M. S. Kim, T. Takabatake, T. Nanba Proceedings of the International Conference on Strongly Correlated Electron Systems (Houston, May 2007). Physica B 403, 761 (2008). (32) Pressure Effect on Pr-based Skutterudite Compounds A. Irizawa, K. Shimai, K. Sato, M. Kobayashi, T. Murakami, H. Okamura, T. Nanba, M. Matsunami, C. Sekine, and I. Shirotani, Proceedings of International Conference on New Quantum Phenomena in Skutterudite and Related Systems (Skutterudite 2007) (Tokyo, 2007). J. Phys. Soc. Jpn. 77 (2008) Suppl. A, pp. 214. (31) Pressure-tuning of the c-f hybridization in Yb metal detected by infrared spectroscopy up to 18 GPa H. Okamura, K. Senoo, M. Mastunami, T. Nanba Proceedings of the International Conference on Novel Pressure-induced Phenomena in Condensed Matter Systems (Fukuoka, July 2006). J. Phys. Soc. Jpn. 76 Suppl. A, pp.9 (2007) (30) Mid-infrared abosrptions in strongly-correlated Yb compounds H. Okamura, T. Watanabe, N. Tsujii, T. Ebihara, T. Nanba Proceedings of the International Conference on Strongly Correlated Electron Systems (Vienna, July 2005). Physica B 378-380 (2006) 756-757. (29) Ultrafast mid-infrared dynamics in the colossal magnetoresistance pyrochlore Tl₂Mn₂O₇. R.P. Prasankumar, A.J. Taylor, R.D. Averitt, H. Okamura, H. Imai, Y. Shimakawa, Y. Kubo Proceedings of the 14th International Conference on Ultrafast Phenomena (July 2004, Niigata, Japan) Ultrafast Phenomena XIV (Springer Verlag, 2005), p313. (28) Optical response of a filled skutterudite compound GdRu₄P₁₂ due to magnetic ordering M. Matsunami, M. Takimoto, H. Okamura, T. Nanba, C. Sekine, I. Shirotani Proceedings of the International Conference on Strongly Correlated Electron Systems (July 2004, Karlsruhle). Physica B 359-361, 844 (2005). (27) New Infrared and Terahertz Beamline BL6B at UVSOR S. Kimura, E. Nakamura, J. Yamazaki, M. Katoh, T. Nishi, H. Okamura, M. Matsunami, L. Chen and T. Nanba Proceedings of the International Conference on Synchtoron Radiation Instrumentations (August 2003, San Francisco). AIP Conf. Proc. 705, 416-419 (2004). (26) Dichroic infrared absorption of dipole centers in cadmium halide crystals M. Terakami, H. Nakagawa, K. Fkui, H. Okamura, T. Hirono, Y. Ikemoto, T. Moriwaki, H. Kimura Proceedings of the 14th International Conference on Dynamical Processes in Excited States of Solids (August 2003, Christchurch) J. Lumines. 108, 75 (2004). (25) *Optical study of c-f* hybridization states in mixed-valent Yb compounds: Metallic YbAl₃ vs Semiconducting YbB₁₂ H. Okamura, T. Michizawa, M. Matsunami, T. Nanba, S. Kimura, T. Ebihara, F. Iga and T. Takabatake Proceedings of the International Conference on Magnetism (Rome, July-August 2003). J. Magn. Magn. Mater. 272-276, e51 (2004). (24) Optical properties of filled skutterudites CeT₄Sb₁₂ (T=Fe, Ru, Os) M. Matsunami, H. Okamura, T. Nanba, H. Sugawara and H. Sato Proceedings of the International Conference on Magnetism (Rome, July-August 2003). J. Magn. Magn. Mater. 272-276, e41 (2004). (23) Infrared study on the metal-insulator transition in filled skutterudites RRu₄P₁₂ (R=Pr, Sm) M. Matsunami, L. Chen, H. Okamura, T. Nanba, C. Sekine and I. Shirotani Proceedings of the International Conference on Magnetism (Rome, July-August 2003). J. Magn. Magn. Mater. 272-276, e39 (2004). (22) Pseudogap and heavy quasiparticle formation in YbAl₃: An optical conductivity study H. Okamura, T. Ebihara, T. Nanba Proceedings of the International Conference on Strongly Correlated Electron Systems (Krakow, Poland, July 2002). Acta Physica Polonica B 34, 1075 (2003). (21) Optical conductivity of diluted Kondo semiconductors Yb_1-xLu_xB₁₂ H. Okamura, M. Matsunami, S. Kimura, T. Nanba, F. Iga, T. Takabatake Proceedings of the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (Sendai, September 2001). J. Phys. Soc. Jpn. 71 Suppl. 303 (2002). (20) Optical Conductivity of CeNiSn, CeRhSb and CeRhAs M. Matsunami, H. Okamura, T. Nanba, T. Suemitsu, T. Yoshino, T. Takabatake, Y. Ishikawa, H. Harima Proceedings of the International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (Sendai, September 2001). J. Phys. Soc. Jpn. 71 Suppl. 291 (2002). (19) Optical gap in diluted Kondo semiconductors Yb_1-xLu_xB₁₂: lattice and single-site effects H. Okamura, M. Matsunami, S. Kimura, T. Nanba, F. Iga, T. Takabatake Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001). Physica B 312-313, 157 (2002). (18) Pseudogap formation in the optical conductivity of CeNiSn, CeRhSb, and CeRhAs. H. Okamura, M. Matsunami, T. Nanba, T. Suemitsu, T. Yoshino, T. Takabatake, Y. Ishikawa, H. Harima Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001). Physica B 312-313, 218 (2002). (17) Magneto-optical study of the colossal magnetoresistance pyrochlore Tl₂Mn₂O₇ H. Okamura, T. Koretsune, M. Matsunami, S. Kimura, T. Nanba, H. Imai, Y. Shimakawa, Y. Kubo Proceedings of the International Conference on Strongly Correlated Electron Systems (Ann Arbor, August 2001). Physica B 312-313, 714 (2002). (16) Infrared beamline at SPring-8: design and commissioning H. Kimura, T. Moriwaki, N. Takahashi H. Aoyagi, T. Matsushita, Y. Ishizawa, M. Masaki, S. Ohishi, H. Okuma, T. Nanba, M. Sakurai, S. Kimura, H. Okamura, N. Nakagawa, T. Takahashi, K. Fukui, K. Shinoda, Y. Kondo, T. Sata, M. Okuno, M. Matsunami, R. Koyanagi and Y. Yoshimatsu Proceedings of the International Conference on Synchtoron Radiation Instrumentations (August 2000, Berlin). Nucl. Instr. Methods Phys. Res. A 467-468, 441 (2001). (15) Infrared experiments under laser excitations at SPring-8 H. Okamura, K. Fukui, M. Matsunami, K. Terakami, M. Koyanagi, T. Koretsune, T. Moriwaki, H. Kimura, H. Nakagawa, Y. Kondo, T. Nanba Proceedings of the International Conference on Synchtoron Radiation Instrumentations (August 2000, Berlin). Nucl. Sci. Instr. Phys. Res. A 467-468, 1465 (2001). (14) Performance of IR-VUV normal incidence monochromator beamline at UVSOR K. Fukui, H. Miura, H. Nakagawa, I. Shimoyama, K. Nakagawa, H. Okamura, T. Nanba, M. Hasumoto, T. Kinoshita Proceedings of the International Conference on Synchtoron Radiation Instrumentations (August 2000, Berlin). Nucl. Sci. Instr. Phys. Res. A 467-468, 601 (2001). (13) "Energy gap evolution in the optical spectra of Kondo alloy system Yb_1-xLu_xB₁₂ H. Okamura, T. Inaoka, S. Kimura, T. Nanba, F. Iga, S. Hiura, J. Klijn and T. Takabatake Proceedings of the International Conference on Strongly Correlated Electronic Systems (Nagano, August 1999) Physica B 281-282, 280 (2000).　　　 (12) "Optical spectra of the Kondo semiconductor YbB₁₂"** H. Okamura, S. Kimura, H. Shinozaki, T. Nanba, F. Iga, N. Shimizu and T. Takabatake: Physics of Strongly Correlated Systems, Jpn. J. Appl. Phys. Ser. 11, p85 (1999). (11) "Optical study of the gap opening and low-energy excitations in YbB₁₂", H. Okamura, S. Kimura, H. Shinozaki, T. Nanba, F. Iga, N. Shimizu and T. Takabatake: Proceedings of the International Conference on Strongly Correlated Electronic Systems (Paris, August 1998) Physica B 259-261, 317 (1999). (10) "Optical spectra of RB_x (R = rare-earth, x = 4, 6, 12)" S. Kimura, H. Okamura, T. Nanba, M. Ikezawa, S. Kunii, F. Iga, N. Shimizu and T. Takabatake Proceedings of VUV-XII, J. Electron Spectrosc. Relat. Phenom. 101-103, 761 (1999). (9) "Inhibited Recombination of Negatively-charged Excitons in GaAs Quantum Wells at High Magnetic Fields", H. Okamura, D. Heiman, M. Sundaram, and A.C. Gossard: Proceedings of the 13th International Conference on High Magnetic Fields in Semiconductor Physics, Physica B 256-258, 470 (1998). (8) "Upgraded Inrared Beamline at UVSOR", M. Sakurai, H. Okamura, M. Watanabe, T. Nanba, S. Kimura, and M. Kamada: J. Synchrotron Rad. 5, 578 (1998). (7) "Reconstruction of BL7B for UV,VIS and IR spectroscopy with a 3 m normal-incidence monochromator." K.Fukui, H.Nakagawa, I.Shimoyama, K.Nakagawa, H.Okamura, T.Nanba, and T. Kinoshita J.Synchrotron Rad. 5, 836-838 (1998). (6) "Exciton recombination dynamics in wide parabolic quantum wells under strong magnetic fields", H. Okamura, D. Heiman, M. Sundaram, and A.C. Gossard: High Magnetic Fields in Semiconductors Physics (ed. D. Heiman, World Scientific, 1995), p358. (5) "Time-resolved photoluminescence from wide parabolic GaAs/AlGaAs quantum wells in high magnetic fields", H. Okamura, L.B. Liao, D. Heiman, M. Sundaram, and A.C. Gossard: Physica B 201, 403 (1994). (4) "Exciton luminescence in the quantum Hall and electron solid regimes", D. Heiman, A. Pinczuk, H. Okamura, M. Dahl,B.S. Dennis, L.N. Pfeiffer, and K.W. West: Physica B 201, 315 (1994). (3) "Time-resolved luminescence spectra of Cr³⁺ ions in mixed-cation β-alumina crystals", T. Hattori, H. Okamura and Y. Hamanaka; Key Engineering Materials 59/60, 91 (1991). (2) "Raman scattering in Rb-Ba β-alumina", T. Hattori, H. Okamura, K. Komuro and A. Mitsuishi; Solid State Ionics 40/41, 99 (1990). (1) "Luminescence spectra of Cr³⁺ in Na_1-xK_x β-alumina crystals", H. Okamura and T. Hattori; Solid State Ionics 40/41, 118 (1990).
(3) Books, Reviews, etc.
「高圧力下のCe, Yb化合物におけるf電子混成状態と光学伝導度」岡村英一、大原繁男、E. D. Bauer, 大貫惇睦高圧力の科学と技術（日本高圧力学会誌）32 (2022) p42-50.（PDF）「SPring-8赤外物性ビームラインとその応用」岡村英一、池本夕佳、森脇太郎日本赤外線学会誌 28 (2018) 48-57. 「赤外分光で探る高圧力下の物質の電子状態」岡村英一高圧力の科学と技術（日本高圧力学会誌） 25 (2015) p11. 「高圧下赤外分光による希土類化合物の電子状態研究」岡村英一、他放射光（日本放射光学会誌） 24, 302 (2011). "Methods for obtaining the optical constants of a material" Hidekazu Okamura Chapter 4, Optical Techniques for Solid State Materials Characterization (R. Prasankumar and A. Taylor, Editors), CRC Press (2011). →出版社ウェブサイトより　 →Amazon.co.jpより希土類化合物の電子状態を赤外分光で探る岡村英一固体物理43, 83 (2008). 希土類化合物の光学スペクトルに現れる普遍的スケーリング岡村英一日本物理学会誌63, 34 (2008). Infrared Study of Valence Transition Compound YbInCu4 Using Cleaved Surfaces H. Okamura SPring-8 Research Frontier 2007. 赤外放射光による光誘起電子状態の研究岡村英一レーザー研究 34(8), 555 (2006) SPring-8赤外物性ビームラインBL43IRの建設木村洋昭、木村真一、岡村英一、篠田圭司、森脇太郎、福井一俊、桜井誠、難波孝夫放射光 14, 250 (2001).