Jing Zhang, Chenxi Hao, Wanhua Zheng, Dieter Bimberg, Anjin Liu, "Demonstration of electrically injected vertical-cavity surface-emitting lasers with post-supported high-contrast gratings," Photonics Res. 10, 1170 (2022)
- Photonics Research
- Vol. 10, Issue 5, 1170 (2022)
Fig. 1. (a) Schematics of the 940 nm HCG-VCSEL. The grating period is Λ a a / Λ t g
Fig. 2. (a) Reflectivity contour of the HCG as a function of normalized thickness (t g / Λ λ / Λ
Fig. 3. Field distribution of the fundamental mode of the designed HCG-VCSEL with an oxide aperture of 4 μm in diameter. The resonant wavelength is 941.6 nm.
Fig. 4. Fabrication process flow of the HCG-VCSEL.
Fig. 5. (a) Infrared microscope image of the mesa after oxidation. The dashed ellipse indicates the profile of the oxidation edge. The size of the oxide aperture is about 4 μm × 8 μm
Fig. 6. (a) L-I-V curves of an HCG-VCSEL. (b) Lasing spot image from the CCD of the HCG-VCSEL at 2 mA. (c) L-I-V curves of the device without an HCG. (d) Image from the CCD of the devices without HCGs at 6 mA.
Fig. 7. (a) Spectra of the HCG-VCSEL under CW operation. (b) Spectra of the device without an HCG at different currents.
Fig. 8. Effective mode lengths of the HCG-VCSELs with different pair numbers of the p-DBR. The TM HCG has a grating period of 380 nm and a bar width of 230 nm. The thickness of the HCG is about a half wavelength.
Fig. 9. Calculated small-signal modulation responses of the TM HCG-VCSEL with a λ / 2
|
Table 1. Simulation Parameters for the TM HCG-VCSEL [37]
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20