3D Semiconductor Nanocavities
Abstract
Nanocavities with a three-dimensional cavity mode confinement have been fabricated and their properties have been explored experimentally. Exhaustive measurements were made of linear and nonlinear transmission and reflectivity, and photoluminescence using cw and femtosecond lasers. The high quality of the oxide-aperture nanocavities containing a single quantum well resulted in a well resolved normal mode coupling and a record splitting-to-linewidth much larger than previously seen for a 3D photonic structure. The lateral confinement clearly suppresses guided modes responsible for a third peak evolving between the two normal modes in a planar microcavity; thus a longstanding mystery was solved. Lasing from microdisks containing quantum dots has been demonstrated at room and low temperature. A new design for a nanocavity has been developed; an air-bridge upper DBR mirror combined with an epitaxial apertured active region leads to a stronger three-dimensional cavity mode confinement. CW lasing from such a nanocavity occurred at room temperature. The coupling of a single quantum dot to a photonic crystal cavity has been investigated. In resonance the dot linewidth broadened considerably indicating the onset of the intermediate coupling regime.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2003
- Accession Number
- ADA420280
Entities
People
- Dennis Deppe
- Galina Khitrova
Organizations
- University of Arizona