Device for emitting electromagnetic radiation at a predetermined wavelength and a method of producing such device
First Claim
1. A device for emitting electromagnetic radiation at a predetermined wavelength, said device having a cavity comprising a first bulk region of one conductivity type and a second bulk region of another conductivity type, and wherein a barrier is provided for spatially separating the charge carriers of said first bulk region and said second bulk region, said barrier being substantially at the antinode of the standing wave pattern of said cavity, the recombination of the charge carriers at the barrier creating said radiation, said first region being adjacent to said barrier and said second region being adjacent to said barrier.
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Abstract
A device for emitting radiation at a predetermined wavelength is disclosed. The device has a cavity comprising a first bulk region and a second bulk region of opposite conductivity type wherein a barrier is provided for spatially separating the charge carriers of the first and the second region substantially at the antinode of the standing wave pattern of said cavity. The recombination of the charge carriers at the barrier create radiation, the emission wavelength of the radiation being determined by the cavity.
5 Citations
26 Claims
- 1. A device for emitting electromagnetic radiation at a predetermined wavelength, said device having a cavity comprising a first bulk region of one conductivity type and a second bulk region of another conductivity type, and wherein a barrier is provided for spatially separating the charge carriers of said first bulk region and said second bulk region, said barrier being substantially at the antinode of the standing wave pattern of said cavity, the recombination of the charge carriers at the barrier creating said radiation, said first region being adjacent to said barrier and said second region being adjacent to said barrier.
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23. A method of producing a device for emitting electromagnetic radiation at a predetermined wavelength, comprising the steps of:
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depositing a first layer including a first material with a first bandgap and having a refractive index n1 and with charge carriers of a first conductivity type on a substrate;
depositing a third layer of a third material with a third bandgap on said first layer, said third bandgap being larger than said first bandgap; and
depositing a second layer of substantially the same thickness as said first layer on said third layer, said second layer being provided with charge carriers of a second conductivity type, the total thickness of said first and said second region having a value of about said predetermined wavelength divided by n1;
while maintaining during said deposition steps at least one surface of said first layer and one surface of said second layer essentially parallel. - View Dependent Claims (24, 25, 26)
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Specification