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
Holding structure for a touch panel
Light-emitting diode package and method for manufacturing the same
Information processing apparatus and power supply controlling method
Method and apparatus for communication channel error rate estimation
Managing job execution
Semiconductor device and fabrication method
Anti-infective agents and uses thereof
  Randomly Featured Patents
Automobile tire
Trap charge equalizing method and threshold voltage distribution reducing method
System and method for determining dose area product in an X-ray imaging system
Gaming device having a selectively accessible bonus scheme
Conducting a transaction with an electronic card
Anticonvulsant derivatives useful for preventing the development of Type II diabetes mellitus and Syndrome X
Arrangement in a subscriber line interface circuit
Pumpably verifiable fluid fiber compositions
Accumulator device for an electric and/or electronic apparatus having a curved shape
Optical pulse chopper