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Photodetector element

  • US 8,125,043 B2
  • Filed: 07/13/2010
  • Issued: 02/28/2012
  • Est. Priority Date: 07/13/2009
  • Status: Expired due to Fees
First Claim
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1. An element of photodetection of a radiation having a wavelength in vacuum close to a value λ

  • 0, comprising;

    a semiconductor layer (1) of index ns and of a thickness ranging between λ

    0/4 ns and λ

    0/20 ns;

    on one side of the semiconductor layer, a first medium (3) of index n1 smaller than ns, transparent to said wavelength;

    on the other side of the semiconductor layer;

    a region (5) of a second medium (6) of index n2 smaller than ns, having a width L substantially equal to λ

    0/ns, andon either side of said region, a third medium (7), of index n3 greater than index n2, forming a reflective interface with the second medium.

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