研究発表 - 洪研究室　横浜国立大学

赤松大輔准教授の研究発表

論文

	2024年
55	P. Morzyński, S. Bilicki, M. Bober, D. Kovačić, R. Ciuryło, M. Zawada, J. Nawrocki, P. Dunst, T. Kobayashi, K. Hosaka and D. Akamatsu, "Intercontinental frequency ratio measurement of ¹⁷¹Yb and ⁸⁸Sr optical lattice clocks," Metrologia, 61, 045009 (2024).
54	T. Kobayashi, D. Akamatsu, K. Hosaka, Y. Hisai, A. Nishiyama, A. Kawasaki, M. Wada, H. Inaba, T. Tanabe, T. Suzuyama, F.-L. Hong, and M. Yasuda, "Generation of a precise time scale assisted by a near-continuously operating optical lattice clock," Phys. Rev. Applied 21, 064015 (2024).
53	S. Matsunaga, Y. Isawa, D. Akamatsu, and F.-L. Hong, "Optical Frequency References at 1542 nm: Precision Spectroscopy of the R(106)50-0, R(100)49-0, R(84)47-0, R(59)45-0, P(82)47-0, and P(71)46-0 Lines of ¹²⁷I₂ at 514 nm," Photonics 11, 770 (2024).
52	Y. Sugiyama, Y. Kondo, T. Horikiri, D. Akamatsu, and F.-L. Hong, "Phase locking and absolute frequency stabilization of laser sources for a Pr:YSO quantum memory," Appl. Phys. Express 17, 052002 (2024).
51	Y. Sakamoto, Y. Kawai, D. Akamatsu, and F.-L. Hong, "Precision spectroscopy of iodine absorption lines near the ¹S₀-³P₂ transition of Yb atoms at 507 nm," Jpn. J. Appl. Phys. 63, 032006 (2024).
50	S. Matsunaga, R. Kato, M. Yoshiki, D. Akamatsu, and F.-L. Hong, "Analysis of the interaction-length dependence of frequency stability in an iodine-stabilized Nd:YAG laser," Appl. Opt. 63, 2078 (2024).
	2023年
49	J. Nomura, D. Akamatsu, and F.-L. Hong, “Linewidth narrowing and frequency stabilization of a coin-sized laser module,” Opt. contin. 2, 2552 (2023).
48	M. Tanaka, S. Suetomo, N. Osato, S. Shinkawa, F.-L. Hong, and D. Akamatsu, “Optical levitation in high vacuum using a 0.9-numerical-aperture lens,” Opt. contin. 2, 2069 (2023).
47	S. Okubo, K. Iwakuni, H. Kato, F.-L. Hong, H. Sasada, H. Inaba, K. M.T. Yamad, “The pressure effect on the line profiles observed in the 𝜈₁ + 𝜈₃ band of acetylene: Revisited,” J. Mol. Spectrosc. 396, 111823 (2023).
46	M. Yoshiki, S. Matsunaga, K.Ikeda, D. Akamatsu, and F.-L. Hong, “Rotation dependence of v′ = 44 excited-state hyperfine constants obtained via precise measurements of the hyperfine structures of 127I2 lines near 514 nm,” Eur. Phys. J. D 77, 140 (2023).
45	Y. Sugiyama, T. Kashimura, K. Kashimoto, D. Akamatsu, and F.-L. Hong, “Precision dual-comb spectroscopy using wavelength-converted frequency combs with low repetition rates,” Scientific Reports 13, 2549 (2023).
44	J. Nomura, T. Momma, Y. Kojima, Y. Hisai, T. Kobayashi, D. Akamatsu, and F.-L. Hong, “Direct loading of Yb atoms into a 3D magneto-optical trap from a dispenser atomic source,” AIP Advances 13, 025361 (2023).
	2022年
43	Y. Tanabe, Y. Sakamoto, T. Kohno, D. Akamatsu and F.-L. Hong, "Frequency references based on molecular iodine for the study of Yb atoms using the ¹S₀ – ³P₁ intercombination transition at 556 nm," Opt. Express 30, 46487 (2022).
42	T. Kobayashi, A. Takamizawa, D. Akamatsu, A. Kawasaki, A. Nishiyama, K. Hosaka, Y. Hisai, M. Wada, H. Inaba, T. Tanabe, M. Yasuda, "Search for ultralight dark matter from long-term frequency comparisons of optical and microwave atomic clocks," Phys. Rev. Lett. 129, 241301 (2022).
41	K. Ikeda, T. Kobayashi, M. Yoshikii, D. Akamatsu and F.-L. Hong, "Hyperfine structure and absolute frequency of ¹²⁷I₂ transitions at 514 nm for wavelength standards at 1542 nm," J. Opt. Soc. Am B, to be published (2022).
40	H. Hisai, Y. Nishida, H. Miyazawa, T. Kobayashi, F.-L. Hong and D. Akamatsu, "Generation of 116 mW output power at 461 nm in a periodically poled lithium niobate waveguide," Jpn. J. Appl. Phys. 61, 020701 (2022).
39	Y. Kojima, K. Ikeda, Y. Tanabe, D. Akamatsu and F.-L. Hong, "Laser frequency measurement at the short-wavelength region using an intermediate laser and a frequency noise cancellation method," Opt. Lett. 47, 30 (2022).
	2021年
38	T. Yamaguchi, D. Akamatsu, and R. Kanamoto, "Low-energy scattering of ultracold atoms by a dielectric nanosphere," Phys. Rev. Research 3, 043214 (2021).
37	Y. Hisai, D. Akamatsu, T. Kobayashi, K. Hosaka, H. Inaba, T. Suzuyama, F.-L. Hong, and M. Yasuda, "Improved frequency ratio measurement with ⁸⁷Sr and ¹⁷¹Yb optical lattice clocks at NMIJ," Metrologia, 58, 015008 (2001).
	2020年
36	E. Pedrozo-Peñafiel, S. Colombo, C. Shu, A. F. Adiyatullin, Z. Li, E. Mendez, B. Braverman, A. Kawasaki, D. Akamatsu, Y. Xiao and V. Vuletić, "Entanglement on an optical atomic-clock transition," Nature 588, pages414 (2020).
35	T. Kobayashi, D. Akamatsu, K. Hosaka, Y. Hisai, M. Wada, H. Inaba, F.-L. Hong, and M. Yasuda, "Demonstration of the nearly continuous operation of an ¹⁷¹Yb optical lattice clock for half a year," Metrologia 57, 065021 (2020).
	2019年
34	T. Kobayashi, D. Akamatsu, K. Hosaka, and M. Yasuda,“A relocking scheme for optical phase locking using a digital circuit with an electrical delay line,” Rev. Sci. Instrum. 90, 103002 (2019).
33	B. Braverman, A. Kawasaki, E. Pedrozo-Peñafiel, S. Colombo, C. Shu, Z. Li, E. Mendez, M. Yamoah, L. Salvi, D. Akamatsu, Y. Xiao, and V. Vuletić, “Near-unitary spin squeezing in 171Yb,” Phys. Rev. Lett. 122, 223203 (2019).
32	A. Kawasaki, B. Braverman, E. Pedrozo-Peñafiel, C. Shu, S. Colombo, Z. Li, Ö. Özel, W. Chen, L. Salvi, A. Heinz, D. Levonian, D. Akamatsu, Y. Xiao, and V. Vuletić, “Geometrically asymmetric optical cavity for strong atom-photon coupling,” Phys. Rev. A 99, 013437 (2019).
31	Y. Hisai, D. Akamatsu, T. Kobayashi, S. Okubo, H. Inaba, K. Hosaka, M.i Yasuda, and F.-L. Hong, "Development of 8-branch Er:fiber frequency comb for Sr and Yb optical lattice clocks," Opt. Express 27, 6404 (2019).
	2018年
30	T. Kobayashi, D. Akamatsu, Y. Hisai, T. Tanabe, H. Inaba, T. Suzuyama, F.-L. Hong, K. Hosaka, and M. Yasuda, "Uncertainty evaluation of an ¹⁷¹Yb optical lattice clock at NMIJ," IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 65, 2449 (2018).
29	D. Akamatsu, T. Kobayashi, Y. Hisai, T. Tanabe, K. Hosaka, M. Yasuda, and F.-L. Hong, “Dual-mode operation of an optical lattice clock using strontium and ytterbium atoms,” IEEE Trans. Ultrason. Ferroelectr. Freq. Control 65, 1069 (2018).
	2017年
28	M. Yasuda, T. Tanabe, T. Kobayashi, D. Akamatsu, T. Sato, and A. Hatakeyama, “Laser-Controlled Cold Ytterbium Atom Source for Transportable Optical Clocks,” J. Phys. Soc. Jpn. 86, 125001 (2017).
	2016年
27	T. Kobayashi, D. Akamatsu, Y. Nishida, T. Tanabe, M. Yasuda, F.-L. Hong, and K. Hosaka, “Second harmonic generation at 399 nm resonant on the ¹S₀ - ¹P₁ transition of ytterbium using a periodically poled LiNbO₃ waveguide,” Opt. Express 24, 12142 (2016).
26	T. Kobayashi, D. Akamatsu, K. Hosaka, H. Inaba, S. Okubo, T. Tanabe, M. Yasuda, A. Onae, and F.-L. Hong, “Absolute frequency measurements and hyperfine structures of the molecular iodine transitions at 578 nm,” J. Opt. Soc. Am. B 33, 725 (2016).
	2015年
25	T. Tanabe, D. Akamatsu, T. Kobayashi, A. Takamizawa, S. Yanagimachi, T. Ikegami, T. Suzuyama, H. Inaba, S. Okubo, M. Yasuda, F.-L. Hong, A. Onae, and K. Hosaka, “Improved Frequency Measurement of the ¹S₀–³P₀ Clock Transition in ⁸⁷Sr Using a Cs Fountain Clock as a Transfer Oscillator,” J. Phys. Soc. Jpn. 84, 115002 (2015).
24	T. Kobayashi, D. Akamatsu, K. Hosaka, H. Inaba, S. Okubo, T. Tanabe, M. Yasuda, A. Onae, and F.-L. Hong, “Compact iodine-stabilized laser operating at 531 nm with stability at the 10^-12 level and using a coin-sized laser module,” Opt. Express 23, 20749 (2015).
23	S. Utsunomiya, N. Namekata, K. Takata, D. Akamatsu, S. Inoue, and Y. Yamamoto, “Binary phase oscillation of two mutually coupled semiconductor lasers,” Opt. Express 23, 6029 (2015).
	2014年
22	D. Akamatsu, M. Yasuda, H. Inaba, K. Hosaka, T. Tanabe, A. Onae, and F.-L. Hong, “Frequency ratio measurement of ¹⁷¹Yb and ⁸⁷Sr optical lattice clocks,” Opt. Express 22, 7898 (2014).
21	D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya and F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7, 012401 (2014).
	2013年
20	H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, and F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21, 7891 (2013).
19	K. Hosaka, H. Inaba, D. Akamatsu, M. Yasuda, J. Sugawara, A. Onae, and F.-L. Hong, “A Fabry?Perot Etalon with an Ultralow Expansion Ceramic Spacer,” Jpn. J. Appl. Phys. 52, 032402 (2013).
	2012年
18	M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, and F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5, 102401 (2012).
17	D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, and F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20, 16010 (2012).
	2011年
16	K. Aikawa, D. Akamatsu, M. Hayashi, J. Kobayashi, M. Ueda, and S. Inouye, “Predicting and verifying transition strengths from weakly bound molecules,” Phys. Rev. A 83, 042706 (2011).
15	D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, and F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19, 2046 (2011).
14	M. Matus, P. Balling, P. Kren, P. Ma?ika, F.-L. Hong, J. Ishikawa, H. Inaba, K. Hosaka, M. Yasuda, D. Akamatsu, A. Onae, R.-H. Shi, J.-L. Peng, E. Howick, J. Qian, X. Liu, M. Ranusawud, A. Tonmueanwai, S. L. Tan, Z. Chao, K.-H. Yeoh, N. M. Daud, T. K. Chan, R. F. O. Stalder, K. Tomanyiczka and L. Robertsson, “The CCL-K11 ongoing key comparison: final report for the year 2010,” Metrologia 48, 04001 (2011).
	2010年
13	K. Aikawa, D. Akamatsu, M. Hayashi, K. Oasa, J. Kobayashi, P. Naidon, T. Kishimoto, M. Ueda, and S. Inouye, “Coherent Transfer of Photoassociated Molecules into the Rovibrational Ground State,” Phys. Rev. Lett. 105, 203001 (2010).
12	M. Arikawa, K. Honda, D. Akamatsu, S. Nagatsuka, K. Akiba, A. Furusawa, and M. Kozuma, “Quantum memory of a squeezed vacuum for arbitrary frequency sidebands,” Phys. Rev. A 81, 021605(R) (2010).
	2009年
11	K. Sasaki, N. Suzuki, D. Akamatsu, and H. Saito, “Rayleigh-Taylor instability and mushroom-pattern formation in a two-component Bose Einstein condenstate,” Phys. Rev. A 80, 063611 (2009).
10	K. Aikawa, D. Akamatsu, J. Kobayashi, M. Ueda, T. Kishimoto, and S. Inouye, “Toward the production of quantum degenerate bosonic polar molecules, 41K87Rb,” New Journal of Physics, 11, 055035 (2009).
	2008年
9	K. Honda, D. Akamatsu, M. Arikawa, Y. Yokoi, K. Akiba, S. Nagatsuka, T. Tanimura. A. Furusawa, and M. Kozuma, “Storage and Retrieval of a Squeezed Vacuum,” Phys. Rev. Lett. 100, 093601 (2008).
	2007年
8	D. Akamatsu, Y. Yokoi, M. Arikawa, S. Nagatsuka, T. Tanimura, A. Furusawa, and M. Kozuma, “Ultraslow propagation of Squeezed Vacuum pulses with Electromagnetically Induced Transparency,” Phys. Rev. Lett. 99, 153602 (2007).
7	M. Arikawa, K. Honda, D. Akamatsu, Y. Yokoi, K. Akiba, S. Nagatsuka, A. Furusawa, and M. Kozuma, “Observation of electromagnetically induced transparency for a squeezed vacuum with time domain method,” Opt Express 15, 11849 (2007).
	2006年
6	T. Tanimura, D. Akamatsu, Y. Yokoi, A. Furusawa, and M. Kozuma, “Generation of a squeezed vacuum resonant on a rubidium D1 line with periodically poled KTiOPO4,” Opt. Lett. 31, 2344 (2006).
5	K. Akiba, D. Akamatsu, and M. Kozuma, “Frequency-filtered parametric fluorescence interacting with an atomic ensemble,” Opt. Commun. 259, 789 (2006).
	2004年
4	D. Akamatsu, K. Akiba, and M. Kozuma, “Electromagnetically Induced Transparency with Squeezed Vacuum,” Phys. Rev. Lett. 92, 203602 (2004).
	2003年
3	D. Akamatsu and M. Kozuma, “Coherent transfer of orbital angular momentum from an atomic system to a light field,” Phys. Rev. A 67, 023803 (2003).
	2002年
2	M. Kozuma, D. Akamatsu, L. Deng, E. W. Hagley, and M. G. Payne, “Steep optical-wave group-velocity reduction and “storage” of light without on-resonance electromagnetically induced transparency,” Phys. Rev. A 66, 031801(R) (2002).
1	L. Deng, E. W. Hagley, M. Kozuma, D. Akamatsu, and M. G. Payne, “Achieving very-low-loss group velocity reduction without electromagnetically induced transparency,” Appl. Phys. Lett. 81, 1168 (2002).

総説・解説等

	2023年
2	杉山陽平、赤松大輔、洪鋒雷：可視域高精度デュアルコム分光技術の開発、「光アライアンス」 Vol. 34, No. 9, pp. 38-42 (2023).
	2019年
4	赤松大輔：光格子時計による精密周波数計測が拓く未来、光アライアンス2019年12月号
	2016年
3	赤松大輔：コラム：私はこうして物理を選んでしまった小学生研究者の夢、パリティ2016 年４月号
	2015年
2	赤松大輔：異種原子光格子時計を用いた精密測定、パリティ2015 年1 月号
	2014年
1	赤松大輔：量子科学最前線：量子世界から外へ若手研究者が語る未来像(インタビュー記事)、日経サイエンス2014 年4 月号

プロシーディングス

	2019年
19	T. Kobayashi, D. Akamatsu, Y. Hisai, T. Tanabe, H. Inaba, T. Suzuyama, F.-L. Hong, K. Hosaka, and M. Yasuda, “Status report on an 171Yb optical lattice clock at NMIJ”, EFTF/IFC 2019, paper ThBT4-1, (IEEE Xplore, 2019).
	2018年
18	Y. Hisai, D. Akamatsu, T.i Kobayashi, S. Okubo, H. Inaba, K. Hosaka, F.-L.i Hong, M.i Yasuda, ”An 8-branch optical frequency comb for laser frequency stabilization and measurement in optical lattice clocks,” CLEO 2018, paper JTh2A.32, (Optical Society of America, 2018).
	2017年
17	Y. Hisai, D. Akamatsu, T. Kobayashi, S. Okubo, H. Inaba, F.-L. Hong, and K. Hosaka, “Development of an 8 branch optical frequency comb for laser frequency stabilization”, Proceedings of Lasers and Electro Optics Pacific Rim (CLEOPR), Singapore (2017).
16	D. Akamatsu, “Optical trap of a nanoparticle in ultra-high vacuum towards a mixture of a nanoparticle and a laser-cooled gas,” 2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017).
	2016年
15	T. Kobayashi, D. Akamatsu, K. Hosaka, H. Inaba, S. Okubo, T. Tanabe, M. Yasuda, A. Onae, and F. -L. Hong, “Sub-Doppler laser spectroscopy of molecular iodine at 578 nm,” 2016 Conference on Precision Electromagnetic Measurements (CPEM 2016).
	2015年
14	T. Kobayashi, D. Akamatsu, K. Hosaka, H. Inaba, S. Okubo, T. Tanabe, M. Yasuda, A. Onae, and F. -L. Hong, “A compact iodine-stabilized diode laser at 531 nm,” 2015 Conference on Lasers and Electro-Optics (CLEO 2015)..
	2014年
13	K. Hosaka, H. Inaba, S. Okubo, D. Akamatsu, M. Yasuda, A. Onae, and F.-L. Hong, “Evaluation of an ultra-stable laser system based on a linewidth transfer method for optical clocks,” in Proceedings of the 28th European Frequency and Time Forum, pp. 186-188 (2014).
	2013年
12	J.-L. Peng, R.-H. Shu, T.-A. Liu, H. Inaba, K. Hosaka, M. Yasuda, D. Akamatsu, A. Onae, and F.-L. Hong, “Optical frequency measurement comparison using fiber laser combs between CMS and NMIJ,” in Proceedings of the 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium, pp. 391-394 (2013).
11	K. Hosaka, H. Inaba, D. Akamatsu, M. Yasuda, A. Onae, F.-L. Hong, and J. Sugawara, “Towards a new clock laser system using a ceramic cavity and laser linewidth transfer technique,” in Proceedings of the 2013 Joint European Frequency and Time Forum & International Frequency Control Symposium, pp. 1030-1032 (2013).
10	F. -L. Hong, H. Inaba, K. Iwakuni, Y. Nakajima, K. Hosaka, M. Yasuda, T. Kohno, D. Akamatsu, T. Tanabe, S. Ohkubo, T. Suzuyama, M. Amemiya and A. Onae, “Precision Measurement with Optical Frequency Combs and Clocks,” 2013 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2013).
9	M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya and F. -L. Hong, “Improved Absolute Frequency Measurement of the Yb-171 Optical Lattice Clock towards the Redefinition of the Second,” 2013 Conference on Lasers and Electro-Optics (CLEO 2013).
	2012年
8	M. Yasuda, T. Kohno, K. Hosaka, H. Inaba, Y. Nakajima, D. Akamatsu, and F. -L. Hong, “Progress of the Yb-171 Optical Lattice Clock at NMIJ, AIST,” 2012 Conference on Lasers and Electro-Optics (CLEO 2012).
7	H. Inaba, Y. Nakajima, K. Iwakuni, K. Hosaka, A. Onae, M. Yasuda, D. Akamatsu, and F. -L. Hong, “Toward an optical frequency comb with relative frequency uncertainty at 10-21-level,” 2012 Conference on Lasers and Electro-Optics (CLEO 2012).
	2011年
6	M. Yasuda, T. Kohno, K. Hosaka, H. Inaba, Y. Nakajima, D. Akamatsu, and F.-L. Hong, “Current status of the 171Yb optical lattice clock at NMIJ, AIST,” in Time and Frequency Metrology III, T. Ido, R. S. Schibli, eds., SPIE Proceedings Series, vol. 8132, p. 81320F (2011).
	2010年
5	H. Inaba, Y. Nakajima, K. Hosaka, K. Iwakuni, M. Yasuda, D. Akamatsu, T. Kohno, A. Onae, and F.-L. Hong, “Low noise optical frequency synthesizer for optical lattice clocks,” in Proceedings of the 2010 International Conference on Electromagnetics in Advanced Applications, pp. 813-816 (2010).
4	K. Hosaka, H. Inaba, Y. Nakajima , K. Hosaka, K. Iwakuni, M. Yasuda, T. Kohno, D. Akamatsu, A. Onae, and F. -L. Hong, “A new clock laser system for an Yb optical lattice clock using a fibre-based frequency comb stabilized to a narrow linewidth laser at 1064 nm,” 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010).
3	D. Akamatsu, M. Yasuda, T. Kohno, K. Hosaka, H. Inaba, Y. Nakajima, and F. -L. Hong, “Toward the Yb/Sr Frequency Ratio Measurement: Development of the Sr Optical Lattice Clock at NMIJ, AIST,” 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010).
2	T. Kohno, M. Yasuda, K. Hosaka, H. Inaba, Y. Nakajima, D. Akamatsu, and F. -L. Hong, “Absolute frequency measurement of 171Yb in a one-dimensional optical lattice,” 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010).
1	M. Yasuda, T. Kohno, K. Hosaka, H. Inaba, Y. Nakajima, D. Akamatsu, and F. -L. Hong, “Improvement of the 171Yb Optical Lattice Clock at NMIJ, AIST,” 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010)