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
System and method for generating profile morphing using cephalometric tracing data
Method and apparatus for controlling peak amplifier and doherty power amplifier
Graphical communication user interface with graphical position user input mechanism for selecting a display image
Two dimensional magnetic sensor immune to skew angle misalignment
Digital photographing apparatus, method of controlling the same, and recording medium for the method
Liquid crystal display having wide viewing angle
Automatic logical position adjustment of multiple screens
  Randomly Featured Patents
Switch lockout device
Combination collapsible top and windshield for a boat console
Low input bias current chopping switch circuit and method
Chromogenic lactam compounds, their preparation and their use
Method for detecting a nucleotide at a specific location within a nucleic acid using exonuclease activity
Method and apparatus for covering landfill
Method for cleaning elements in vacuum chamber and apparatus for processing substrates
Test strip with identification function and test instrument using the same
Bamboo composite board and beam product
Giant magnetroresistive ratio sensing system