Semiconductor light emitting device

US5543638A · kind A · utility

Assignee

• Asea Brown Boveri, S.A. · CH

Inventors

• Hans Nettelbladt · Bromma, SE
• Michael Widman · Tateyama, JP

Key dates

• Filing date: Jul 13, 1994
• Grant date: Aug 6, 1996
• Expiry date: Jul 13, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H29/10

Abstract

A semiconductor light-emitting device employs a quantum well having a fundamental wavelength in the absence of an external electric field; a microcavity with two reflectors, having a resonance wavelength which closely corresponds to the fundamental wavelength of the quantum well; and electrodes for applying an electric field across the microcavity to change the wavelength of the quantum well and thereby control the radiance of the microcavity.