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Infrared-to-visible converter

  • US 5,510,627 A
  • Filed: 06/29/1994
  • Issued: 04/23/1996
  • Est. Priority Date: 06/29/1994
  • Status: Expired due to Fees
First Claim
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1. A device for converting a first light radiation into a second light radiations, comprising:

  • (a) a first contact region doped with first type impurities;

    (b) a second contact region disposed on said first contact region, said second contact region being doped with second type impurities opposite to said first type impurities, said first contact region and said second contact region forming a P-N junction;

    (c) a quantum well structure comprising a plurality of alternating quantum well layers and barrier layers formed between said first contact region and said second contact region within said P-N junction, both said quantum well layers and said barrier layers being heavily doped with said first type impurities;

    (d) a blocking layer disposed between a last barrier layer and said second contact region, said blocking layer being an aluminum arsenide block layer formed to prevent holes from the second contact region from drifting into said quantum well structure; and

    (e) a voltage source electrically connected to said first and second contact regions, for forward biasing said P-N junction to enable said device to emit said second light radiation by radiative recombination of excess carriers representative of electrons and holes in said second contact region, when said first contact region is illuminated with said first light radiation.

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