Journal of Infrared and Millimeter Waves, Volume. 40, Issue 6, 834(2021)
Design of high refractive index contrast subwavelength grating reflector for 940 nmVCSEL
A high-refractive-index contrast subwavelength grating (HCG) for 940 nm GaAs-based VCSEL is reported. The reflector is composed of GaAs and AlOx. The effects of the grating parameters of TE-HCG on refractivity are discussed in detail. And the structural characteristics of TE-HCG and TM-HCG are analyzed, especially the influence of their topography errors on the high reflection band. The 940 nm TE-HCG has a large reflection bandwidth of up to 97 nm with its reflectivity for TE incident light more than 99.5%, and the ratio of Ratio of high reflection band to central wavelength is more than 10%. But for TM incident light its reflectivity is less than 90%. It is worth mentioning that the VCSEL with such a TE-HCG can be prepared by one-time epitaxial growth technology, which helps to improve the performance of the device. Furthermore, it greatly reduces the manufacturing difficulty and cost of a VCSEL.
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Yan LUO, Yong-Qin HAO, Chang-Ling YAN. Design of high refractive index contrast subwavelength grating reflector for 940 nmVCSEL[J]. Journal of Infrared and Millimeter Waves, 2021, 40(6): 834
Category: Research Articles
Received: Nov. 5, 2020
Accepted: --
Published Online: Feb. 16, 2022
The Author Email: Yong-Qin HAO (hyq72081220@aliyun.com)