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学術論⽂（査読付）

2023年〜2013年

New!!
“Drift-Diffusion Simulation of Intermediate Band Solar Cell: Effect of Intermediate Band Continuity Constraint“
Kodai Shiba, Yoshitaka Okada, and Tomah Sogabe: Journal of Nanomaterials [IF: 3.791] Vol.2023, Article ID 5578627, DOI 10.1155/2023/5578627 (2023/11/27)

ポイント💡：中間バンド太陽電池のドリフト拡散シミュレーション：中間バンド連続性制約の効果

“Inverse design of intermediate band solar cell via a joint drift-diffusion simulator and deep reinforcement learning scheme“
Kodai Shiba, Naoya Miyashita, Yoshitaka Okada, Tomah Sogabe: Japanese Journal of Applied Physics [IF: 1.491] Vol.62, SK1046 (2023) DOI 10.35848/1347-4065/acd34f (2023/6/8)

ポイント💡：ドリフト拡散シミュレータと深層強化学習の併用による中間バンド太陽電池の逆設計

“Enhanced Hot-Phonon Bottleneck Effect on Slowing Hot Carrier Cooling in Metal Halide Perovskite Quantum Dots With Alloyed A-Site“
Hua Li, Qing Wang, Yusuke Oteki, Chao Ding, Dong Liu, Yao Guo, Yusheng Li, Yuyao Wei, Dandan Wang, Yongge Yang, Taizo Masuda, Mengmeng Chen, Zheng Zhang, Tomah Sogabe, Shuzi Hayase, Yoshitaka Okada, Satoshi Iikubo, Qing Shen: Advanced Materials [IF: 32.086] Vol.35, 2301834(2023) DOI 10.1002/adma.202301834 (2023/6/13)

ポイント💡：合金Aサイトを有する金属ハライドペロブスカイト量子ドットにおけるホットキャリア冷却を遅延させるホットフォノンボトルネック効果の向上

“Enhanced current generation in quantum-dot intermediate band solar cells through optimizing the position of quantum dot layers”
Yusuke Oteki, Naoya Miyashita, Maxime Giteau, Kento Kitahara, Kodai Shiba, Tomah Sogabe and Yoshitaka Okada: Optical Materials: X [IF: 3.754] Vol.16, DOI 10.1016/j.omx.2022.100207 (2022/10/25)

ポイント💡：量子ドット層位置の最適化による量子ドット中間バンド太陽電池の電流生成の向上

“General Vapnik–Chervonenkis dimension bounds for quantum circuit learning”
Chih-Chieh Chen, Masaru Sogabe, Kodai Shiba, Katsuyoshi Sakamoto and Tomah Sogabe: Journal of Physics: Complexity [IF: 2.154] Vol.3, No.4 (2022) DOI 10.1088/2632-072X/ac9f9b (2022/11/14)

ポイント💡：量子回路学習のための汎用的Vapnik-Chervonenkis次元境界

“Ultrafast inverse design of quantum dot optical spectra via a joint TD-DFT learning scheme and deep reinforcement learning”
Hibiki Yoshida, Katsuyoshi Sakamoto, Naoya Miyashita, Koichi Yamaguchi, Qing Shen, Yoshitaka Okada and Tomah Sogabe: AIP Advances [IF: 1.697] Vol.12, 115316(2022) DOI 10.1063/5.0127546 (2022/11/10)

ポイント💡：TD-DFT学習方式と深層強化学習の併用による量子ドット光スペクトルの超高速逆設計

“AI-Assisted Decision Making and Risk Evaluation in Uncertain Environment Using Stochastic Inverse Reinforcement Learning: American Football as A Case Study”
Risa Takayanagi, Keita Takahashi and Tomah Sogabe: Mathematical Problems in Engineering [IF: 1.430] Vol.2022, Article ID 4451427(2022) DOI 10.1155/2022/4451427 (2022/10/10)

ポイント💡：確率的逆強化学習を用いた不確実な環境下でのAI支援による意思決定とリスク評価：アメリカンフットボールを事例として

“Demonstration of in-plane miniband formation in InAs/InAsSb ultrahigh-density quantum dots by analysis of temperature dependence of photoluminescence”
Sho Tatsugi, Naoya Miyashita, Tomah Sogabe and Koichi Yamaguchi: Japanese Journal of Applied Physics [IF: 1.491] Vol.61(10) 102009 (2022) DOI 10.35848/1347-4065/ac9349 (2022/10/10)

ポイント💡：フォトルミネッセンスの温度依存性解析によるInAs/InAsSb超高密度量子ドットにおける面内ミニバンド形成の実証

“Model-Free Deep Recurrent Q-Network Reinforcement Learning for Quantum Circuit Architectures Design“
Tomah Sogabe, Tomoaki Kimura, Chih-Chieh Chen, Kodai Shiba, Nobuhiro Kasahara, Masaru Sogabe, Katsuyoshi Sakamoto: Quantum Reports [IF: 2.214] Vol.4(4) 380-389 (2022) DOI 10.3390/quantum4040027(2022/9/21)

ポイント💡：量子回路設計のためのモデルフリーDeep Recurrent Q-Network (DRQN) 強化学習

“Over 15% Efficiency PbS Quantum-Dot Solar Cells by Synergistic Effects of Three Interface Engineering: Reducing Nonradiative Recombination and Balancing Charge Carrier Extraction“
C. Ding, D. Wang, D. Liu, H. Li, Y. Li, S. Hayase, T. Sogabe, T. Masuda, Y. Zhou, Y. Yao, Z. Zou, R. Wang and Q. Shen: Advanced Energy Materials [IF: 29.368] Vol.12(35) 2201676(2022) DOI 10.1002/aenm.202201676 (2022/7/28)

ポイント💡：3つの界面エンジニアリングの相乗効果によりPbS量子ドット太陽電池の変換効率15％超を実現：無輻射再結合の抑制と電荷キャリア抽出のバランス改善

電通大ニュースリリース →→→ CLICK!

“Quantum circuit architectures via quantum observable Markov decision process planning“
Tomoaki Kimura, Kodai Shiba, Chih-Chieh Chen, Masaru Sogabe, Katsuyoshi Sakamoto, Tomah Sogabe: Journal of Physics Communications [IF: 1.200] Vol.6(7) 075006 (2022) DOI 10.1088/2399-6528/ac7d39 (2022/7/14)

ポイント💡：量子観測マルコフ決定過程におけるプランニングに基づく量子回路設計

電通大ニュースリリース→→→CLICK!

“Attention and masking embedded ensemble reinforcement learning for smart energy optimization and risk evaluation under uncertainties“
Tomah Sogabe, Dinesh Malla, Chih-Chieh Chen and Katsuyoshi Sakamoto: Journal of Renewable and Sustainable Energy [IF: 2.847] Vol.14, 045501 (2022) DOI 10.1063/5.0097344 (2022/7/8)

ポイント💡：アテンションとマスキングを組み込んだアンサンブル強化学習によるスマートエネルギー最適化及びリスク評価

電通大ニュースリリース→→→CLICK!

‟Hydrodynamic and Energy Transport Model-Based Hot-Carrier Effect in GaAs pin Solar Cell”
Tomah Sogabe, Kodai Shiba, Katsuyoshi Sakamoto: Electronic Materials, Vol.3(2) 185-200 (2022) DOI 10.3390/electronicmat3020016 (2022/5/11)

ポイント💡：pin 接合型GaAs太陽電池における流体力学およびエネルギー輸送モデルに基づくホットキャリア効果

“Quantum Dot Phase Transition Simulation with Hybrid Quantum Annealing via Metropolis-Adjusted Stochastic Gradient Langevin Dynamics“
Kodai Shiba, Ryo Sugiyama, Koichi Yamaguchi, Tomah Sogabe: Advances in Condensed Matter Physics [IF: 1.500] Vol.2022, Article ID 9711407, DOI 10.1155/2022/9711407 (2022/4/11)

ポイント💡：Metropolis-Adjusted Langevin Algorithm (MALA) と確率的勾配ランジュバン動力学 (SGLD) の併用によるハイブリッド量子アニーリングを用いた量子ドット相転移シミュレーション

“Variational Quantum Circuit-Based Reinforcement Learning for POMDP and Experimental Implementation“
Tomoaki Kimura, Kodai Shiba, Chih-Chieh Chen, Masaru Sogabe, Katsuyoshi Sakamoto, Tomah Sogabe: Mathematical Problems in Engineering [IF: 1.430] Vol. 2021, Article ID 3511029, DOI 10.1155/2021/3511029 (2021/12/23)

ポイント💡：変分量子回路を用いた強化学習によるPOMDP手法及びその実験的実装

“Quantum-Inspired Classification Algorithm from DBSCAN–Deutsch–Jozsa Support Vectors and Ising Prediction Model“
Kodai Shiba, Chih-Chieh Chen, Masaru Sogabe, Katsuyoshi Sakamoto, Tomah Sogabe: Applied Sciences [IF: 2.838] Vol.11(23) DOI 10.3390/app112311386 (2021/12/1)

ポイント💡：DBSCAN+Deutsch–Jozsaサポートベクトル及びイジング予測モデルを用いた量子インスパイア型分類アルゴリズム

日刊工業新聞電子版→→→CLICK!

“InAs/GaAsSb In-Plane Ultrahigh-Density Quantum Dot Lasers“
Motoyuki Tanaka, Keichiro Banba, Tomah Sogabe, Koichi Yamaguchi: Applied Physics Express [IF: 2.819] Vol.14, 124002, DOI 10.35848/1882-0786/ac3542 (2021/11/22)

ポイント💡：InAs/GaAsSb層による面内超高密度量子ドットレーザの開発

電通大ニュースリリース→→→CLICK!

  • Chih-Chieh Chen, Masaya Watabe, Kodai Shiba, Masaru Sogabe, Katsuyoshi Sakamoto, Tomah Sogabe:“On the Expressibility and Overfitting of Quantum Circuit Learning”, ACM Transactions on Quantum ComputingVolume 2Issue 2July 2021 Article No. 8 (2021)

  • T.Sogabe, C-Y. Hung, R.Tamaki, S.Tomic, K.Yamaguchi, N. Ekins-Daukes and Y. Okada, “Experimental demonstration of energy-transfer ratchet intermediate-band solar cell”, Communications  Physics  4, 38 (2021). https://doi.org/10.1038/s42005-021-00543-1(springer nature).   (pdf file is available and is for academic use only)

    ニュースリリースに関連する情報：
    全文（PDF) :　　  https://www.uec.ac.jp/about/publicity/news_release/2021/pdf/20210301.pdf
    電通大　HP:  　　https://www.uec.ac.jp/news/announcement/2021/20210301_3151.html
    東大先端研HP: 　 https://www.rcast.u-tokyo.ac.jp/ja/news/report/page_00042.html

    Editor’s Highlightに選出：Editor’s Highlights – Communications Physics (nature.com)

  • M. Watabe, K. Shiba, C-C. Chen, M. Sogabe, K. Sakamoto and T. Sogabe*, “Quantum Circuit Learning with Error Backpropagation Algorithm and Experimental Implementation”, Quantum Reports, Vol.3 (2) pp.333-349(2021), DOI: 10.3390/quantum3020021.

  • R. Suzuki, K. Terada, K. Sakamoto, T. Sogabe and K. Yamaguchi ,“ Low Sunlight Concentration Properties of InAs Ultrahigh-Density Quantum-Dot Solar Cells”, Jpn. J. Appl. Phys., 58, (2019) pp.071004 1-7.

  • R. Sugiyama, S. Tatsugi, T. Sogabe and K. Yamaguchi, “Optical Transition and Carrier Relaxation in a Type-II InAs/GaAsSb Quantum Dot Layer”, Japanese Journal of Applied Physics, Vol.58(1) pp.012004 1-5(2019), DOI: 10.7567/1347-4065/aae8ea.

  • A. Makaino, K. Sakamoto, T. Sogabe, S. Kobayashi and K. Yamaguchi, “Self-Formation of InAs Quantum Dots on SiOx/Semiconductor Substrates by Molecular Beam Deposition”, Applied Physics Express, Vol.11 (8) pp.085501 1-4(2018), DOI: 10.7567/APEX.11.085501.

  • Bernice Mae Yu Jeco, T.Sogabe, N. Ahsan, and Y. Okada, “Temperature Dependence of Luminescence Coupling Effect in InGaP/GaAs/Ge Triple Junction Solar Cells”  J. of Photonics for Energy, 8(2), 022602 (2018)

  • S. Oikawa, A. Makaino, T. Sogabe and K. Yamaguchi, “Growth process and Photoluminescence Properties of In-Plane Ultrahigh-Density InAs Quantum Dots on InAsSb/GaAs(001)”, Physica. Status Solidi B, Vol.255 (4) pp.1700307 1-5(2017). 

  • BMFY. Jeco, T. Sogabe, R. Tamaki, N. Ahsan, Y. Okada, “Impact of optically nonuniform luminescence coupling effect to the limiting cell conversion efficiency in InGaP/GaAs/Ge triple junction solar cell”, Journal of Photonics for Energy, Vol.7 (3) Article No. 035501 (2017), DOI:10.1117/1.JPE.7.035501.

  • E. López, A. Datas, I. Ramiro, P.G. Linares, E. Antolín, I. Artacho, A. Martí, A. Luque, Y. Shoji, T. Sogabe, A. Ogura, Y. Okada, “Demonstration of the operation principles of Intermediate Band Solar Cells at room temperature” , Sol. Energ. Mat. Sol. Solar Energy Materials and Solar Cells,149, 15, (2016),

  • T. Sogabe, Q. Shen, Y. Yamaguchi, “Recent progress on quantum dot solar cells: A review”, J. Photon. Energy. 6(4) 040901 (2016)

  • Chao-Yu Hung, Tomah Sogabe, Naoya Miyashita, and Yoshitaka Okada, ”Growth of ErAs nanodots by molecular beam epitaxy for application to tunneling junctions in multijunction solar cells”, Japanese Journal of Applied Phyisics, 55, 021201,(2016)

  • G. Linares, E. López, I. Ramiro, A. Datas, E. Antolín, Y. Shoji, T. Sogabe, Y. Okada, A. Martí, and A. Luque,”Voltage limitation analysis in strain-balanced InAs/GaAsN quantum dot solar cells applied to the intermediate band concept”, Sol. Energ. Mat. Sol., 132, 178 (5 pages)(2015)

  • Datas, E. López, I. Ramiro, E. Antolín, A. Martí, A. Luque, R. Tamaki, Y. Shoji, T. Sogabe, and Y. Okada,” Intermediate Band Solar Cell with Extreme Broadband Spectrum Quantum Efficiency”, Phys. Rev. Lett. 114, 157701(4 pages) (2015) [selected as “Editorial Suggestion paper in Phys. Rev. Lett.]

  • López, A.Datas, I.Ramiro, P.G. Linares, E. Antolín, I. Artacho, A.Martí and A. Luque,Y. Shoji, T. Sogabe, A. Ogura and Y. Okada,” Demonstration of the operation principles of Intermediate Band Solar Cells at room temperature”, Sol. Energ. Mat. Sol., 149,15(4 pages) (2015)

  • C-Y. Hung, Sogabe, N.Miyashita, Y.Okada,”Growth of ErAs nanodots by molecular beam epitaxy for application to tunneling junctions in multijunction solar cells”, Jpn. J. Appl. Phys. 55 021201(7 pages) (2015)

  • Sogabe, A.Ogura, M.Ohba,Y. Okada, “Self-consistent electrical parameter extraction from bias dependent spectral response measurements of III-V multi-junction solar cells”, Prog. Photovolt: Res. Appl., 23, 37(12 pages)(2015)

  • Sogabe, Y.Shoji, P.Mulder, J.Schermer, E.Tamayo,Y.Okada, “Enhancement of current collection in epitaxial lift-off InAs/GaAs quantum dot thin film solar cell and concentrated photovoltaic study”, Appl. Phys. Lett. 105, 113904(4 pages) (2014)

  • Sogabe, Y.Shoji, M.Ohba, K.Yoshida, R.Tamaki, H-F. Hong, C-H. Wu, C-T. Kuo, S. Tomić, Y.Okada, ” Intermediate-band dynamics of quantum dots solar cell in concentrator photovoltaic modules “, Sci. Rep. (Nature Publishing Group), 4, 4792(7 pages) (2014)

  • Ogura, T.Sogabe, M.Ohba,Y.Okada, “Extraction of electrical parameters in multi-junction solar cells from voltage dependent spectral response without light bias”, Jpn J. Appl.Phys. 53, 066601 (5 pages)(2014)

  • Sogabe, A.Ogura, Y.Okada, “Analysis of bias voltage dependent spectral response in Ga0.51In0.49P/Ga0.99In0.01As/Ge triple junction solar cell”, J.Appl.Phys. 115, 7, 074503(7 pages) (2014)

  • Tomić, T.Sogabe*,Y.Okada, “In-plane coupling effect on absorption coefficients of InAs/GaAs quantum dots arrays for intermediate band solar cell”, Prog. Photovolt: Res. Appl., 23,546(13 pages)(2014) (Co-corresponding author)

  • Sogabe, T.Kaizu, Y.Okada,S.Tomić, “Theoretical analysis of GaAs/AlGaAs quantum dots in quantum wire array for intermediate band solar cell”, J. Renewable Sustainable Energy, 6, 011206(11 pages) (2014)

  • Sogabe, A.Ogura, C-Y. Hung, V. Evstropov, M.Mintairov, M.Shvarts,Y.Okada, “Experimental characterization and self-consistent modeling of luminescence coupling effect in III-V multijunction solar cells”, Appl. Phys. Lett. 103, 263907(4 pages) (2013)

  • Okada, N. J. Ekins-Daukes, T. Kita, R. Tamaki, M. Yoshida, A. Pusch, O. Hess, C. C. Phillips, D. J. Farrell1, K. Yoshida1, N. Ahsan, Y. Shoji, T. Sogabe and J.-F. Guillemoles, “Intermediate band solar cells: Recent progress and future directions”, Appl. Phys. Rev. 2, 021302 (2015) [Selected as the cover of the issue]

  • Y. Okada, K. Yoshida, Y. Shoji, T. Sogabe,  “Recent progress on quantum dot intermediate band solar cells”, (review paper ) IEICE Electronics Express, 10, 1 (2013)

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