Publications

Papers published in Journals

  • K. Sato, M. Okano, and Y. Shoji, “Ultracompact microring optical isolator using an aluminum-substituted cobalt ferrite thin film,” Optica, vol. 11, no. 6, 889 – 895 (June 2024). 10.1364/OPTICA.511956
  • D. Minemura and Y. Shoji “Design of ultra-low-loss magneto-optical isolator fabricated by µ-transfer printing,” IEICE Electronic Express, vol. 21, Issue 1, p. 20230521 (Nov. 2023). 10.1587/elex.20.20230521
  • [Collaboration] Y. Honda, E. Igarashi, Y. Shoji, T. Amemiya, “Extended optical waveguide theory with magneto-optical effect and magnetoelectric effect, Opt. Express, vol. 31, no. 20, pp. 32017-32043 (2023). 10.1364/OE.496200
  • Y. Shoji, S. Taniguchi, and S. Yajima, “(Invited) Nonvolatile photonic switch with magnetic materials on a silicon photonic platform,” Opt. Mater. Express, vol. 13, issue 9, pp. 2489–2496 (Aug. 2023). 10.1364/OME.498243
  • D. Minemura, R. Kou, Y. Sutoh, T. Murai, K. Yamada, and Y. Shoji “Compact magneto-optical isolator by µ-transfer printing of magneto-optical single-crystal film on silicon waveguides,” Opt. Express, vol. 31, issue 17, pp. 27821-27829 (Aug. 2023). 10.1364/OE.497731
  • S. Yajima, N. Nishiyama, Y. Shoji, “High-speed Modulation in Waveguide Magneto-Optical Switch with Impedance-matching Electrode” Opt. Express, vol. 8, no. 10, pp. 16243-16250 (May 2023). 10.1364/OE.480835
  • Z. Liang, S. Liu, Y. Shoji, “Improvement of extinction in optically-controlled silicon thermo-optic switch based on micro-ring resonator with distinct probe signal,” Jpn. J. Appl. Phys., vol. 62, p. 032001, (Mar. 2023). 10.35848/1347-4065/acbc5d
  • S. Liu, D. Minemura, Y. Shoji, “Silicon-based integrated polarization-independent magneto-optical isolator,” Optica, vol. 10, no. 3, pp. 373-378 (Mar. 2023). 10.1364/OPTICA.483017
  • [Collaboration] R. Ma, S. Reniers, Y. Shoji, T. Mizumoto, Y. Jiao, J. V. D. Tol and K. Williams, “Demonstration of an on-chip TE-mode optical circulator,” IEEE J. Quantum Electron., vol. 59, no. 3, p. 0600707 (Jan. 2023). 10.1109/JQE.2023.3238739
  • [Collaboration] P. Pintus, L. Ranzani, S. Pinna, D. Huang, M. V. Gustafsson, F. Karinou, G. A. Casula, Y. Shoji, Y. Takamura, T. Mizumoto, M. Soltani and J. E. Bowers, “An integrated magneto-optic modulator for cryogenic applications,” Nature Electronics, vol. 5, pp. 604-610 (Sep. 2022). 10.1038/s41928-022-00823-w
  • S. Yajima and Y. Shoji, “Integrated photonic traveling salesman problem probabilistic solver with polynomial calculation time complexity,” Jpn. J. Appl. Phys., vol. 61, p. 052003 (May 2022). 10.35848/1347-4065/ac55e2
  • T. Murai, Y. Shoji and T. Mizumoto, “Light-induced thermomagnetic recording of thin-film magnet CoFeB on silicon waveguide for on-chip magneto-optical memory,” Opt. Express, vol. 30, no. 11, pp. 18054–18065 (May 2022). 10.1364/OE.448460
  • S. Liu, Y. Shoji and T. Mizumoto, “TE-mode magneto-optical isolator based on an asymmetric microring resonator under a unidirectional magnetic field,” Opt. Express, vol. 30, no. 6, pp. 9934–9943 (Mar. 2022). 10.1364/OE.454751
  • M. A. Serrano-Núñez, Y. Shoji, and T. Mizumoto, “Small magnetless integrated optical isolator using a magnetized cobalt ferrite film,” IEICE Electronics Express, vol. 19, no. 2, p. 20210500 (Jan. 2022). 10.1587/elex.18.20210500
  • [Collaboration] R. Ma, S. Reniers, Y. Shoji, T. Mizumoto, K. Williams, Y. Jiao, and J. V. D. Tol, “Integrated polarization-independent optical isolators and circulators on an InP membrane on silicon platform,” Optica, vol. 8, no. 12, pp. 1654–1661 (Dec. 2021). 10.1364/OPTICA.443097
  • R. H. Neranjith, Y. Shoji, T. Mizumoto, “4-Bit All-Optical Serial-to-Parallel Converter With Sub-dB/cm Delay Lines Based on Rib Waveguides,” J. Lightw. Technol., vol. 39, issue 20, pp. 6524-6530 (Aug. 2021). 10.1109/JLT.2021.3104530
  • M. A. Serrano-Núñez, Y. Shoji, and T. Mizumoto, “Design of ultra-compact TE mode ring optical isolator using a cobalt ferrite film for silicon photonic integrated circuits,” Jpn. J. Appl. Phys., vol. 60, pp. 092003-1–7, (Aug. 2021). 10.35848/1347-4065/ac1986
  • S. Liu, Y. Shoji, T. Mizumoto, “Mode-evolution-based TE mode magneto-optical isolator using asymmetric adiabatic tapered waveguides,” Optics Express, vol. 29, no. 15, pp. 22838-22846 (July 2021). 10.1364/OE.427914
  • D. Minemura, S. Liu, Y. Shoji, T. Mizumoto, “Polarization coupler for polarization-rotating Mach-Zehnder interferometer,” Electronics Express, vol. 18, issue 10, p. 20210176 (May 2021). 10.1587/elex.18.20210176
  • T. Murai, Y. Shoji, N. Nishiyama, T. Mizumoto, “Magneto-optical Microring Switch Based on Amorphous Silicon-on-Garnet Platform for Photonic Integrated Circuits,” IEICE Trans. Electron., vol. E103-C, no. 11, pp.645–652 (Nov. 2020). 10.1587/transele.2019OCP0003
  • T. Murai, Y. Shoji, N. Nishiyama, T. Mizumoto, “Nonvolatile magneto–optical switches integrated with magnet stripe array,” Optics Express, vol. 28, no. 21, pp. 31675–31685 (Oct. 12, 2020). 10.1364/OE.403129
  • R. H. Neranjith, Y. Shoji, T. Mizumoto, “All-optical serial-to-parallel converter based on nonlinear effects in silicon microring resonators,” IEICE Electronics Express, vol. 17, issue 16, p. 20200227 (Sept. 2020). 10.1587/elex.17.20200227
  • Y. Kondo, T. Murai, Y. Shoji, T. Mizumoto, “All-optical switch by light-to-heat conversion in metal deposited Si ring resonator,” IEEE Photon. Technol. Lett., vol, 32, no. 13, pp. 807–810 (July 2020). 10.1109/LPT.2020.2998521
  • M. A. Serrano-Núñez, Y. Shoji, and T. Mizumoto, “Giant Faraday rotation of cobalt ferrite thin films deposited on silicon substrates for silicon photonic nonreciprocal device applications,” Appl. Phys. Express, vol. 13, p. 062002 (May 2020). 10.35848/1882-0786/ab8b52
  • R. H. Neranjith, Y. Shoji, T. Mizumoto, “MZI-based all-optical serial-to-parallel conversion circuit by free-carrier dispersion effect,” Jpn. J. Appl. Phys., vol. 59, p. 012003 (Jan. 2020). 10.7567/1347-4065/ab5b87
  • T. Murai, Y. Shoji, N. Nishiyama, T. Mizumoto, “Wavelength-tunable operation of magneto-optical switch consisting of amorphous silicon microring resonator on garnet,” Jpn. J. Appl. Phys., vol. 58, No. 7, p. 072006 (July 2019). 10.7567/1347-4065/ab2a19
  • T. Murai, Y. Shoji, T. Mizumoto, “Efficient light-to-heat conversion by optical absorption of a metal on an Si microring resonator,” J. Lightw. Technol., vol. 37, Issue 10, pp. 2223–2231 (May 2019). 10.1109/JLT.2019.2900515
  • Y. Shoji and T. Mizumoto, “(Invited) Silicon waveguide optical isolator with direct bonded magneto-optical garnet,” Appl. Sci., vol. 9, no. 3, p. 609 (Feb. 2019). 10.3390/app9030609
  • Y. Shoji and T. Mizumoto, “(Invited) Waveguide magneto-optical devices for photonics integrated circuits,” Opt. Mater. Express, vol. 8, no. 8, pp. 2387–2394 (Aug. 2018).
  • R. Yamaguchi, Y. Shoji, T. Mizumoto, “Low-loss waveguide optical isolator with tapered mode converter and magneto-optical phase shifter for TE mode input,” Opt. Express, vol. 26, no. 16, p. 21271–21278 (Aug. 2018).
  • K. Okazeri, K. Muraoka, Y. Shoji, S. Nakagawa, N. Nishiyama, S. Arai, T. Mizumoto, “Self-holding magneto-optical switch integrated with thin-film magnet,” IEEE Photon. Technol. Lett., vol. 30, no. 4, pp. 371–374 (Jan. 2018).
  • D. Huang, P. Pintus, Y. Shoji, P. Morton, T. Mizumoto, J. E. Bowers, “Integrated broadband Ce:YIG/Si Mach Zehnder optical isolators with over 100 nm tuning range,” Opt. Lett., vol. 42, no. 23, pp. 4901–4904 (Nov. 2017).
  • [Collaboration] P. Pintus, D. Huang, C. Zhang, Y. Shoji, T. Mizumoto, J. E. Bowers, “Microring-based optical isolator and circulator with integrated electromagnet for silicon photonics,” IEEE J. Lightw. Technol., vol. 35, no. 8, pp. 1429–1437 (Apr. 2017).
  • [Collaboration] D. Huang, P. Pintus, C. Zhang, P. Morton, Y. Shoji, T. Mizumoto, J. E. Bowers, “Dynamically reconfigurable integrated optical circulators,” Optica, vol. 4, no. 1, pp. 23–30 (Jan. 2017).
  • K. Miura, Y. Shoji, and T. Mizumoto, “Mach-Zehnder wavelength selective switch embedded with microring resonators,” Jpn. J. Appl. Phys., vol. 56, p. 022201 (Jan. 2017).
  • E. Ishida, K. Miura, Y. Shoji, H. Yokoi, T. Mizumoto, N. Nishiyama, S. Arai, “Amorphous-Si waveguide on a garnet magneto-optical isolator with a TE mode nonreciprocal phase shift,” Opt. Express, vol. 25, no. 1, pp. 452–462 (Jan. 2017).
  • Y. Shoji, A. Fujie, and T. Mizumoto, “(Invited) Silicon waveguide optical isolator operating for TE mode input light,” IEEE J. Select. Top. Quantum Electron., vol. 22, no. 6, p. 4403307 (Dec. 2016).
  • [Collaboration] D. Huang, P. Pintus, C. Zhang, Y. Shoji, T. Mizumoto, J. E. Bowers, “Electrically driven and thermally tunable integrated optical isolators for silicon photonics,” IEEE J. Lightw. Technol., vol. 22, no. 6, p. 4403408 (Dec. 2016).
  • E. Ishida, K. Miura, Y. Shoji, T. Mizumoto, N. Nishiyama, S. Arai, “Magneto-optical switch with amorphous silicon waveguides on magneto-optical garnet,” Jpn J. Appl. Phys., vol. 55, no. 8, p. 088002 (July 2016).
  • K. Miura, Y. Shoji, and T. Mizumoto, “Silicon on-chip wavelength-selective switch composed of Mach-Zehnder-interferometer-based switches and microring resonators,” Jpn J. Appl. Phys., vol. 55, no. 6, p. 068001 (May 2016).
  • K. Furuya, T. Nemoto, K. Kato, Y. Shoji, and T. Mizumoto, “Athermal operation of a waveguide optical isolator based on canceling phase deviations in a Mach-Zehnder interferometer,” J. Lightwave Technol., vol. 34, no. 8, pp. 1699–1705 (Apr. 2016).
  • Y. Shoji, K. Miura, and T. Mizumoto, “(Topical Review) Optical nonreciprocal devices based on magneto-optical phase shift in silicon photonics,” J. Opt., vol. 18, no. 1, p. 013001 (Nov. 2015).
  • M. Yanaga, Y. Shoji, Y. Takamura, S. Nakagawa, and T. Mizumoto, “Compact magnetooptical isolator with cobalt ferrite on silicon photonic circuits,” Appl. Phys. Express, vol. 8, no. 8, p. 082201 (July 2015).
  • [Collaboration] A. Ishikawa, T. Amemiya, Y. Shoji, P. N. Hai, M. Tanaka, T. Mizumoto, S. Arai, and T. Tanaka, “Optical and Magnetic Microstructures in YIG Ferrite Fabricated by Femtosecond Laser,” J. Laser Micro/Nanoengineering, vol. 10, no. 1, pp. 48–52 (Feb. 2015).
  • S.-H. Kim, K. Tanizawa, Y. Shoji, G. Cong, K. Suzuki, K. Ikeda, H. Ishikawa, S. Namiki, and H. Kawashima, “Compact 2 × 2 polarization-diversity Si-wire switch,” Opt. Express, vol. 22, no. 24, pp. 29818–29826 (Nov. 2014).
  • Y. Shoji, M. Yanaga, T. Kashima, T. Suzuki, S. Nakagawa, and T. Mizumoto, “Application of cobalt ferrite to an ultra-compact magneto-optical isolator on silicon photonics circuits,” J. Jpn. Soc. Powder Powder Metallurgy, vol. 61, no. S1, pp. S343–S345 (May 2014).
  • T. Mizumoto, Y. Shoji, and K. Mitsuya, “Silicon waveguide optical nonreciprocal devices based on magneto-optical phase shift,” Proc. SPIE, vol. 8988, p. 89880C (Mar. 2014).
  • [Collaboration] T. Amemiya, A. Ishikawa, Y. Shoji, P. N. Hai, M. Tanaka, T. Mizumoto, T. Tanaka, and S. Arai, “Three-dimensional Nanostructuring in YIG Ferrite with Femtosecond Laser,” Opt. Lett., vol. 39, No. 2, pp. 212–215 (Jan. 2014).
  • Y. Shoji, Y. Shirato, and T. Mizumoto, “Silicon Mach-Zehnder interferometer optical isolator having 8 nm bandwidth for over 20 dB isolation,” Jpn. J. Appl. Phys., vol. 53, no. 2, p.022202 (Jan. 2014).
  • Y. Shoji, and T. Mizumoto, “(Review article) Magneto-optical non-reciprocal devices in silicon photonics,” Sci. Technol. Adv. Mater., vol. 15, no. 1, p.014602 (Jan. 2014).
  • Y. Sobu, Y. Shoji, K. Sakurai, and T. Mizumoto, “GaInAsP/InP MZI waveguide optical isolator integrated with spot size converter,” Opt. Express, vol. 21, no. 13, pp. 15373–15381 (June 2013).
  • K. Mitsuya, Y. Shoji, and T. Mizumoto, “Demonstration of a silicon waveguide optical circulator,” IEEE Photon. Technol. Lett., vol. 25, no. 8, pp. 721–723 (Apr. 2013).
  • [Collaboration] S. Ghosh, S. Keyvaninia, Y. Shoji, W. V. Roy, T. Mizumoto, G. Roelkens, and R. G. Baets, “Compact Mach-Zehnder interferometer Ce:YIG/SOI optical isolator,” IEEE Photon. Technol. Lett., vol. 24, no. 18, pp. 1653–1656 (Sept. 2012).
  • K. Nakayama, Y. Shoji, and T. Mizumoto, “Single trench SiON waveguide TE-TM mode converter,” IEEE Photon. Technol. Lett., vol. 24, no. 15, pp.1310–1312 (Aug. 2012).
  • Y. Shoji, M. Ito, Y. Shirato, and T. Mizumoto, “MZI optical isolator with Si-wire waveguides by surface-activated direct bonding,” Opt. Express, vol. 20, No. 16, pp.18440–18448 (July 2012).
  • T. Mizumoto, Y. Shoji, and R. Takei, “(Invited) Direct wafer bonding and its application to waveguide optical isolators,” Materials, vol. 5, pp. 985–1004 (May 2012).
  • T. Mizumoto, R. Takei, and Y. Shoji, “(Invited) Waveguide optical isolators for integrated optics,” IEEE J. Quantum Electron., vol. 48, no. 2, pp. 252–260 (Feb. 2012).
  • Y. Shoji, K. Kintaka, S. Suda, H. Kawashima, T. Hasama, and H. Ishikawa, “Four-port optical switch having three connection states with Si waveguides,” IEEE Photon. Technol. Lett., vol.23, no. 1, pp.12–14, (Jan. 2011).
  • Y. Shoji, K. Nakanishi, Y. Sakakibara, K. Kintaka, H. Kawashima, M. Mori, and T. Kamei, “Hydrogenated amorphous silicon carbide optical waveguide for telecommunication applications,” Appl. Phys. Express, vol.3, no. 12, p.122201 (Dec. 2010).
  • Y. Shoji, K. Kintaka, S. Suda, H. Kawashima, T. Hasama, and H. Ishikawa, “Low-crosstalk 2 × 2 thermo-optic switch with silicon wire waveguides,” Opt. Express, vol. 18, no. 9, pp.9071–9075 (Apr. 2010).
  • Y. Shoji, T. Ogasawara, T. Kamei, Y. Sakakibara, S. Suda, K. Kintaka, H. Kawashima, M. Okano, T. Hasama, H. Ishikawa, and M. Mori, “Ultrafast nonlinear effects in hydrogenated amorphous silicon wire waveguide,” Opt. Express, vol. 18, no. 6, pp.5668–5673 (Mar. 2010).
  • S.-H. Kim, R. Takei, Y. Shoji, and T. Mizumoto, “Single-trench waveguide TE-TM mode converter,” Opt. Express, vol. 17, no. 14, pp. 11267-11273 (July, 2009).
  • Y. Shoji, T. Mizumoto, H. Yokoi, I-Wei Hsieh, and R. M. Osgood, Jr., “Magneto-optical isolator with silicon waveguides fabricated by direct bonding,” Appl. Phys. Lett., vol. 92, no. 7, p. 071117 (Feb. 2008).
  • Y. Shoji, I-Wei Hsieh, R. M. Osgood, Jr., and T. Mizumoto, “Polarization-independent magneto-optical waveguide isolator using TM-mode nonreciprocal phase shift,” IEEE/OSA J. Lightwave Technol., vol.25, No.10, pp.3108–3113 (Oct., 2007).
  • Y. Shoji and T. Mizumoto, “Wideband operation of Mach-Zehnder interferometric magneto-optical isolator using phase adjustment,” Opt. Express, vol.15, no. 20, pp.13446–13450 (Oct. 2007).
  • Y. Yazaki, Y. Shoji, and T. Mizumoto, “Demonstration of interferometric waveguide isolator with a unidirectional magnetic field,” Jpn J. Appl. Phys., vol.46, No.8B, pp.5460-5464 (Aug. 2007).
  • Y. Shoji and T. Mizumoto, “Ultra-wideband design of waveguide magneto-optical isolator operating in 1.31 µm and 1.55 µm band,” Opt. Express, vol.15, no. 2, pp.639–645 (Jan. 22, 2007).
  • Y. Shoji and T. Mizumoto, “Wideband design of nonreciprocal phase shift optical isolators using phase adjustment in Mach-Zehnder interferometers,” Appl. Opt., vol.45, No.27, pp.7144–7150 (Sep., 2006).
  • H. Yokoi, Y. Shoji, T. Suzuki, N. Nishimura, and T. Mizumoto, “Coupling characteristics of thee-guide tapered coupler for optical isolator with Si guiding layer,” Jpn. J. Appl. Phys., vol.45, No.8A, pp.6323-6325 (Aug., 2006).
  • J.-S. Yang, Y. Shoji, H. Yokoi, M. Ono, and T. Mizumoto, “Investigation of nonreciprocal characteristics and design of interferometric optical isolator with multimode interference coupler operating with a unidirectional magnetic field,“ Jpn. J. Appl. Phys., vol.43, No.10, pp.7045-7049 (Oct., 2004).
  • H. Yokoi, Y. Shoji, E. Shin, and T. Mizumoto, “Interferometric optical isolator employing a nonreciprocal phase shift operated in a unidirectional magnetic field,” Appl. Opt., vol.43, No.24, pp.4745-4752 (Aug., 2004).
  • H. Yokoi, Y. Shoji, and T. Mizumoto, “Calculation of nonreciprocal phase shift in magnetooptic waveguide with Si guiding layer,“ Jpn. J. Appl. Phys., vol. 43, No.8B, pp.5871-5874 (Aug., 2004).
  • Y. Shoji, H. Yokoi, and T. Mizumoto, “Enhancement of magneto-optic effect in optical isolator with GaInAsP guiding layer by selective oxidation of AlInAs,” Jpn. J. Appl. Phys., vol.43, No.2, pp.590–593 (Feb., 2004).
  • H. Yokoi, T. Mizumoto, and Y. Shoji, “Optical nonreciprocal devices with a silicon guiding layer fabricated by wafer bonding,” Appl. Opt., vol. 42, No.33, pp.6605-6612 (Nov., 2003).

東京工業大学 未来産業技術研究所/工学院電気電子系

庄司研究室

〒152-8550 東京都目黒区大岡山2-12-1-S9-10

Shoji Lab.

Tokyo Institute of Technology, FIRST / Dept. of Electrical and Electronic Engineering

S9-10, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550

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