Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Electrically pumped edge-emitting photonic bandgap semiconductor laser










Image Number 5 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
Method for forming contact in an integrated circuit
Method for providing information of access point selection
Tab visibility
Lens driving device
Lithographic apparatus and device manufacturing method
Differentiated PSIP table update interval technology
Method or system for investing and/or trading
  Randomly Featured Patents
Apparatus for forming multiple toner images in register with each other on a substrate
Branched polycarbonate produced by reactive extrusion
Combination dessicant and vapor-corrosion inhibitor
Method and system for calibrating a tire pressure sensing system for an automotive vehicle
Verbena plant named `Bodcompur`
Plasma burners
Integral elastic support structure with ornamental elements and method for manufacturing such structure
Muntin bar clip and muntin bar assembly
Food package containing separate trays connected together by a single lid structure
Device for measuring filter pressure loss