Work

Directional waveguide coupling from a wavelength-scale deformed microdisk laser

Year: 2012

Type: article

Abstract: We demonstrate uni-directional evanescent coupling of lasing emission from a wavelength-scale deformed microdisk to a waveguide. This is attributed to the Goos-Hänchen shift and Fresnel filtering effect that result in a spatial separation of the clockwise (CW) and counter-clockwise (CCW) propagating ray orbits. By placing the waveguide tangentially at different locations to the cavity boundary, we may selectively couple the CW (CCW) wave out, leaving the CCW (CW) wave inside the cavity, which also reduces the spatial hole burning effect. The device geometry is optimized with a full-wave simulation tool, and the lasing behavior and directional coupling are confirmed experimentally.

Source: Applied Physics Letters

DOI: 10.1063/1.3684249

Authors: Brandon Redding, Li Ge, Glenn S. Solomon, Hui Cao

Institutions: Yale University, Princeton University, National Institute of Standards and Technology, Joint Quantum Institute

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, National Institute of Standards and Technology

Awards: QUANTUM-CLASSICAL TRANSITION IN DEFORMED MICROACTIVITES, Collaborative Research: Mesoscopic Transport and Localization in Active Random Media