Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers

Nobuhide Yokota; Kunpei Nisaka; Hiroshi Yasaka; Kazuhiro Ikeda

doi:10.1063/1.5040914

Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers

Nobuhide Yokota, Kunpei Nisaka, Hiroshi Yasaka, Kazuhiro Ikeda

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

The spin polarization modulation in birefringent vertical-cavity surface-emitting lasers (VCSELs) is investigated theoretically and experimentally for obtaining tailored polarization modulation characteristics suitable for high-speed data communications. A spin-flip rate equation analysis reveals that the spin polarization modulation response of VCSELs is flattened by shortening the electron spin relaxation time and its 3-dB bandwidth is broadened to a range determined by a frequency split between two orthogonal polarization modes. Optical modulations of spin polarized electrons in commercially-available InAlGaAs quantum well VCSELs demonstrate a wide 3-dB bandwidth of 23 GHz determined by the frequency split, which indicates that the spin relaxation time in the InAlGaAs quantum well VCSEL is around 20 ps at room temperature and suitable for use in high-speed data communications at a telecom wavelength of 1.55 μm.

Original language	English
Article number	171102
Journal	Applied Physics Letters
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.5040914
Publication status	Published - 2018 Oct 22

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.5040914

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title = "Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers",

abstract = "The spin polarization modulation in birefringent vertical-cavity surface-emitting lasers (VCSELs) is investigated theoretically and experimentally for obtaining tailored polarization modulation characteristics suitable for high-speed data communications. A spin-flip rate equation analysis reveals that the spin polarization modulation response of VCSELs is flattened by shortening the electron spin relaxation time and its 3-dB bandwidth is broadened to a range determined by a frequency split between two orthogonal polarization modes. Optical modulations of spin polarized electrons in commercially-available InAlGaAs quantum well VCSELs demonstrate a wide 3-dB bandwidth of 23 GHz determined by the frequency split, which indicates that the spin relaxation time in the InAlGaAs quantum well VCSEL is around 20 ps at room temperature and suitable for use in high-speed data communications at a telecom wavelength of 1.55 μm.",

author = "Nobuhide Yokota and Kunpei Nisaka and Hiroshi Yasaka and Kazuhiro Ikeda",

note = "Funding Information: This work was supported by The Telecommunications Advancement Foundation, Inamori Foundation, the Sasakawa Scientific Research Grant from The Japan Science Society, and JSPS KAKENHI Grant No. 15K04709. Publisher Copyright: {\textcopyright} 2018 Author(s).",

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doi = "10.1063/1.5040914",

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TY - JOUR

T1 - Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers

AU - Yokota, Nobuhide

AU - Nisaka, Kunpei

AU - Yasaka, Hiroshi

AU - Ikeda, Kazuhiro

N1 - Funding Information: This work was supported by The Telecommunications Advancement Foundation, Inamori Foundation, the Sasakawa Scientific Research Grant from The Japan Science Society, and JSPS KAKENHI Grant No. 15K04709. Publisher Copyright: © 2018 Author(s).

PY - 2018/10/22

Y1 - 2018/10/22

N2 - The spin polarization modulation in birefringent vertical-cavity surface-emitting lasers (VCSELs) is investigated theoretically and experimentally for obtaining tailored polarization modulation characteristics suitable for high-speed data communications. A spin-flip rate equation analysis reveals that the spin polarization modulation response of VCSELs is flattened by shortening the electron spin relaxation time and its 3-dB bandwidth is broadened to a range determined by a frequency split between two orthogonal polarization modes. Optical modulations of spin polarized electrons in commercially-available InAlGaAs quantum well VCSELs demonstrate a wide 3-dB bandwidth of 23 GHz determined by the frequency split, which indicates that the spin relaxation time in the InAlGaAs quantum well VCSEL is around 20 ps at room temperature and suitable for use in high-speed data communications at a telecom wavelength of 1.55 μm.

AB - The spin polarization modulation in birefringent vertical-cavity surface-emitting lasers (VCSELs) is investigated theoretically and experimentally for obtaining tailored polarization modulation characteristics suitable for high-speed data communications. A spin-flip rate equation analysis reveals that the spin polarization modulation response of VCSELs is flattened by shortening the electron spin relaxation time and its 3-dB bandwidth is broadened to a range determined by a frequency split between two orthogonal polarization modes. Optical modulations of spin polarized electrons in commercially-available InAlGaAs quantum well VCSELs demonstrate a wide 3-dB bandwidth of 23 GHz determined by the frequency split, which indicates that the spin relaxation time in the InAlGaAs quantum well VCSEL is around 20 ps at room temperature and suitable for use in high-speed data communications at a telecom wavelength of 1.55 μm.

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JO - Applied Physics Letters

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IS - 17

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ER -

Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers

Abstract

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