Accession Number : ADP007887

Title :   Lasing in Sub-Micron Wide Vertical Cavity Microlasers by Picosecond Optical Pumping,

Corporate Author : AT AND T BELL LABS HOLMDEL NJ

Personal Author(s) : Jewell, J. L. ; Scherer, A. ; Van der Gaag, B. ; McCall, S. L. ; Harbison, J. P.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Microcavity lasers potentially will have ultra-low thresholds in the uA range or even lower. We have begun to investigate lasing in GaAs/AlAs microresonators as small as -0.4 um wide (less than halt the free-space wavelength) and in various rectangular shapes. The smallest devices, approx. 0.4X0.4 um had the lowest threshold which was only 2 pJ incident. This low threshold, achieved despite -10 ps carrier lifetimes, an estimated 5 % absorption efficiency in the cavity spacer, and probably low coupling efficiency of the pump beam, is encouraging for the long range development of microcavity lasers.

Descriptors :   *OPTICAL PUMPING, *GALLIUM ARSENIDE LASERS, ABSORPTION, CAVITIES, COUPLINGS, EFFICIENCY, SHAPE, SPACERS.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE