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
Listing recommendation using generation of a user-specific query in a network-based commerce system
Display screen or portion thereof with animated graphical user interface
Monitoring cloud-runtime operations
Spectrometer
Adaptive contact window wherein the probability that an answering user/expert will respond to a question corresponds to the answering users having response rates that are based on the time of
Malicious attack detection and analysis
SRAM cells using shared gate electrode configuration
  Randomly Featured Patents
Liquid developing apparatus having regulatory roller for preventing developer spread
Flame-retardent polycarbonate resin composition and a molded product using the same
Cleavable diepoxide for removable epoxy compositions
Liquid crystal display device and method of driving the same
Card connector with reliable terminal mounting structure
Superwide-angle lens optical system, and imaging unit and display unit comprising the same
Steering wheel
Chain-coupled polymeric alkoxide compounds having controlled viscosity
Method and apparatus for application-independent end-to-end security in shared-link access networks
Electric board and image forming apparatus