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

被引：41
|
作者：
Yokota, Nobuhide [1 ]
Nisaka, Kunpei [1 ]
Yasaka, Hiroshi [1 ]
Ikeda, Kazuhiro [2 ]
机构：
[1] Tohoku Univ, Res Inst Elect Commun, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[2] Natl Inst Adv Ind Sci & Technol, 1-1-1 Umezono, Tsukuba, Ibaraki 3058569, Japan
来源：
APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 17期
关键词：
MODE; SPINTRONICS; INJECTION;
D O I：
10.1063/1.5040914
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 highspeed data communications at a telecom wavelength of 1.55 lm. Published by AIP Publishing.
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页数：5
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