Patent ID: 6324199
Filing Date: 2001-11-27
Classification: B82Y,H01S

Abstract:
An intersubband semiconductor light source comprising:a core region including a unipolar radiative transition (RT) region having upper and lower energy levels, an injector-only (I) region disposed on one side of said RT region and a reflector/extractor-only (R/E) region disposed on the other side of said RT region, said I region having a first miniband of energy levels aligned so as to inject electrons into said upper energy level, and said R/E region having a second miniband of energy levels aligned so as to extract electrons from said lower energy level and also having a minigap aligned so as to inhibit the extraction of electrons from said upper level, andelectrodes for applying a voltage to said source effective to cause said RT region to generate light at a wavelength determined by the energy difference between said upper and lower energy levels.