title: High quality factors and room-temperature lasing in a modified single-defect photonic crystal cavity.
abstract: We propose and analyze a new photonic crystal cavity design that supports a dipole mode with a quality factor greater than 20,000. Such a high quality factor is obtained by precise tuning of the cavity length with minimal disruption of the surrounding photonic crystal. A fabrication procedure based on dry etching of InGaAsP material in HI/H2/Ar is used to demonstrate photonic crystal lasers with smooth and straight sidewalls. These room-temperature lasers concentrate optical energy in air and are suitable for use as tunable lasers and chemical sensors.
authors.affiliation: Department of Electrical Engineering, California Institute of Technology, MS 136-93, Pasadena, California 91125, USA. loncar@deas.harvard.edu
authors.forename: Marko
authors.initials: M
authors.lastname: Loncar
authors.forename: Michael
authors.initials: M
authors.lastname: Hochberg
authors.forename: Axel
authors.initials: A
authors.lastname: Scherer
authors.forename: Yueming
authors.initials: Y
authors.lastname: Qiu