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
System and methods for facilitating and documenting user thinking and learning using enhanced interactive constructs
Horizontal card holder
High-speed comparator with asymmetric frequency response
Soybean cultivar CL0911444
Modified binding proteins inhibiting the VEGF-A receptor interaction
Unified feedback frame for supporting a plurality of feedback modes and a multiple-input multiple-output (MIMO) communication system using the unified feedback frame
Sample chamber for laser ablation inductively coupled plasma mass spectroscopy
  Randomly Featured Patents
Lightweight motorcycle wheel
Method and device for fracture-splitting a workpiece
Ductile low temperature brazing alloy
Leak detection tape
Developer containing magnetic and non-magnetic toner
Polymerizable preparations based on epoxides that contain silicon
Heat-sound insulating wall
Process for preparing malleable collagen and the product thereof
Brake booster utilizing a pump of a power steering device
Apparatus for processing a plurality of circular wafers