Quantum cascade laser

Details Quantum cascade laser Quantum cascade laser

2008-04-15

2008-04-15

Harvey, Minsun (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S045010

Reexamination Certificate

active

07359418

ABSTRACT:
A quantum cascade laser1, which generates infrared light or other light of a predetermined wavelength by making use of intersubband transitions in a quantum well structure, is arranged by forming, on a GaAs substrate10, an AlGaAs/GaAs active layer11having a cascade structure in which quantum well light emitting layers and injection layers are laminated alternately. Also, at the GaAs substrate10side and the side opposite the GaAs substrate10side of active layer11, is provided a waveguide structure, comprising waveguide core layers12and14, each being formed of an n-type GaInNAs layer, which is a group III-V compound semiconductor that contains N (nitrogen), formed so as to be lattice matched with the GaAs substrate10, and waveguide clad layers13and15, each formed of an n++-type GaAs layer. A quantum cascade laser, with which the waveguide loss of generated light in the laser is reduced, is thereby realized.

REFERENCES:
patent: 6560259 (2003-05-01), Hwang
patent: 6621842 (2003-09-01), Dapkus
patent: 6849866 (2005-02-01), Taylor
patent: 2002/0075920 (2002-06-01), Spruytte et al.
patent: 2004/0161006 (2004-08-01), Chang et al.
“Cascade” Merriam-Webster Online accessed on Aug. 1, 2006 at (http://m-w.com/dictionary/cascade).
Bellaiche et al., “Localization and Percolation in Semiconductor Alloys: GaAsN vs GaAsP”, Physical Review B, vol. 54, No. 24, Dec. 15, 1996, pp. 17568-17576.
Sirtori et al., “Low-loss Al-free Waveguides for Unipolar Semiconductor Lasers”, Applied Physics Letters, vol. 75, No. 25, pp. 3911-3913, Dec. 20, 1999.

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