Resources Contact Us Home Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE     Electrically pumped edge-emitting photonic bandgap semiconductor laser Image Number 7 for United States Patent #6674778. A highly efficient, electrically pumped edge-emitting semiconductor laser based on a one- or two-dimensional photonic bandgap (PBG) structure is described. The laser optical cavity is formed using a pair of PBG mirrors operating in the photonic band gap regime. Transverse confinement is achieved by surrounding an active semiconductor layer of high refractive index with lower-index cladding layers. The cladding layers can be electrically insulating in the passive PBG mirror and waveguide regions with a small conducting aperture for efficient channeling of the injection pump current into the active region. The active layer can comprise a quantum well structure. The quantum well structure can be relaxed in the passive regions to provide efficient extraction of laser light from the active region.       Recently Added Patents Electrostatic switch for high frequency and method for manufacturing the same System and method for automatic landmark labeling with minimal supervision Filter cigarette Dual path hydraulic strut mounts and vehicular suspension systems including the same Acoustic resonator and sound chamber Skin penetrating touch fasteners Captured air inflatable dome canopy   Randomly Featured Patents Reflective trail marker Thermostatic switch Printing apparatus Hydrocyclone and associated methods Furnace air circulation system Electric cable termination gland Printed wiring board and method for manufacturing the same Bleaching process and compositions Xylanases, genes encoding them, and uses thereof Phase change type optical recording apparatus and optical recording method using an overwrite system © 2006-2008 PatentGenius. All Rights Reserved.