Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Quantum cascade laser: bias-neutral design










Image Number 10 for United States Patent #8121164.

A quantum cascade laser (QCL) having a bias-neutral design and a semiconductor with multiple layers of Al.sub.xIn.sub.1-xAs/In.sub.yGa.sub.1-yAs. The first active region barrier has a thickness of less than fourteen angstroms, and the second active region barrier has a thickness of less than eleven angstroms. The lower active region wavefunction overlaps with each of the injector level wavefunctions. Also, the laser transition is vertical at a bias close to roll-over. The injector level 3' is above a lower laser level 3, the injector level 2' is below the lower laser level 3, and the active region level 2 is confined to the active region. The lower laser level 3 is separated from the active region level 2 by the energy of the LO phonon. The remaining active region states and the remaining injector states are either above the lower laser level 3 or significantly below the active region level 2.








 
 
  Recently Added Patents
Method and device for coding a video image with a coding error estimation algorithm
Current sensor including a sintered metal layer
Hydroconversion multi-metallic catalyst and method for making thereof
Energy storage type of dual-drive coupled power distribution system
Method for switching the use of a shared set of wireless I/O devices between multiple computers
Semiconductor structure
Protecting a BSF entity from attack
  Randomly Featured Patents
Router-based remittance systems and methods
Optoelectronic device and process for acquiring symbols, such as bar codes, using a two-dimensional sensor
Alignment detection system
Turbocharger
Terminal block with multiple track mounting capability
Constant fusing pressure thermoplastic lid sealing apparatus and method
Antiseptic-containing alginate impression material
Compressor with particle separation
Transistor structures
Method and apparatus for supplying sample sand from a mixing machine to a sand-property-measuring apparatus