Resources Contact Us Home
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
Tri-material dual-species neutron spectrometer
Lubricating oil with enhanced protection against wear and corrosion
Bit error mitigation
Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, image forming method, and image forming apparatus
Enhanced claims damage estimation using aggregate display
Hypallergenic mosaic antigens and methods of making same
Image enhancement based on multiple frames and motion estimation
  Randomly Featured Patents
Toilet seat handle
Probes for detecting and identifying Helicobacter pylori
Reciprocating compressor driven by a linear motor
Pressure relief valve with stiff support
Cutting tool
Forced beam switching in wireless communication systems having smart antennas
Apparatus for growing hollow crystalline bodies from the melt
Lace lasso shoelace tie restraining device
Protective helmet
Signal converter and signal conversion method