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
Shallow trench media
Systems and methods for restoring images
Sports helmet
Method and system for detecting target objects
Coordinated garbage collection for raid array of solid state disks
Method for designing sunlight-reflection and heat-radiation multilayer film
Data processing apparatus, activation control method, and computer-readable storage medium
  Randomly Featured Patents
Mini grater
Intra-respiratory vaccine for prevention of Bordetella bronchiseptica infection and method of use
Mobile air decontamination and purification unit
Automated sample concentrator for trace components
Remote-controlled message sign
Method to achieve low and stable ferromagnetic coupling field
Method for the sequential production of a heterogeneous catalyst library
Photosensitive-material conveying apparatus
Apparatus for making available a leno thread for a weaving machine
Programmable control unit for a watering system