期刊
APPLIED PHYSICS LETTERS
卷 113, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5040914
关键词
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资金
- Telecommunications Advancement Foundation
- Japan Science Society
- JSPS KAKENHI [15K04709]
- Inamori Foundation
- Grants-in-Aid for Scientific Research [15K04709] Funding Source: KAKEN
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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