Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 14: Nanophotonics - Devices II (Focused Session with DS)

HL 14.7: Topical Talk

Montag, 22. März 2010, 17:15–17:45, H2

Long-Wavelength Vertical-Cavity Surface-Emitting Lasers with a High-Contrast Grating — •Werner Hofmann — Technische Universität Berlin

Long-wavelength Vertical-Cavity Surface-Emitting Lasers (VCSELs) based on a subwavelength high-contrast gratings (HCGs) as output mirrors have been realized for the first time. By design, these devices are highly polarization stable, single-mode at large apertures and solve the VCSEL-mirror problem at long wavelengths in an elegant way. The device is grown on an InP substrate, incorporating a BTJ for a low electrical and optical losses and avoiding p-material. A hybrid reflector is used as bottom-mirror and the light is coupled out via the HCG reflector. With cost effective mass-fabrication in mind, the top HCG reflector consists of amorphous silicon on isolator. The single-mode laser emission is tailored to be around 1320 nm wavelength targeting applications in high-speed optical data transmission, especially for passive optical networks. The device is manufactured in a low parasitics, high-speed design, good for bandwidths well above 10 GHz. We report single-mode emission for devices with apertures as large as 11 µm operating continuous wave with output-powers in excess of 0.4 mW. Pulsed operation with output powers up to 4 mW at room temperature is demonstrated as well. This is the first electrically pumped VCSEL structure realized in this wavelength regime utilizing an HCG mirror.


This document was translated from LATEX by HEVEA.
100% | Bildschirmansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2010 > Regensburg