Photonic Crystal Surface Emitting Diode Lasers with λ near 2 µm
- State University of New York (SUNY), Stony Brook, NY (United States)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
Epitaxially regrown electrically pumped photonic crystal surface emitting lasers (PCSELs) operating near 2 µm were designed and fabricated within a III-V-Sb material system. A high-index-contrast photonic crystal layer was incorporated into the laser heterostructures by air-pocket-retaining epitaxial regrowth. Transmission electron microscopy studies confirmed uniform and continuous AlGaAsSb initial growth over the nano-patterned GaSb surface, followed by the development of the air-pockets. The PCSEL threshold current density had a minimal value of ~170 A/cm2 in the 160–180 K temperature range when the QW gain spectrum aligned with the Γ2 band edge of the photonic crystal. The devices operated in a continuous wave regime at 160 K. The divergence and polarization of the multimode laser beam emitted from the 200 µm × 200 µm PCSEL aperture were controlled by filamentation.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1922722
- Report Number(s):
- BNL-223940-2023-JAAM
- Journal Information:
- Photonics, Journal Name: Photonics Journal Issue: 12 Vol. 9; ISSN 2304-6732
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
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