Lasing in Sub-Micron Wide Vertical Cavity Microlasers by Picosecond Optical Pumping,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007887
Entities
People
- A. Scherer
- B. Van Der Gaag
- J. L. Jewell
- J. P. Harbison
- S. L. Mccall