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US 6,501,783 B1Granted
Distributed feedback surface plasmon laser
AssigneeLucent Technologies Inc.
InventorsFederico Capasso, Alfred Yi Cho, Claire F. Gmachl, Albert Lee Hutchinson, Deborah Lee Sivco, Alessandro Tredicucci
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Abstract
A surface plasmon laser structure is formed to include a DFB structure as the metal carrying layer, thus forming a single mode surface plasmon laser. The DFB structure comprises a multiple layer metallic surface guiding structure (for example, titanium stripes covered with a layer of gold. forming alternating Ti/Au—Au stripes). The active region, in one embodiment, may comprise a quantum cascade structure.
Claims17
An article comprising a surface plasmon laser structure comprising
- a semiconducting substrate having a top major surface;
- an active region disposed to cover a portion of said semiconducting substrate top major surface, said active region formed as a ridge including sidewalls and a top surface;
- a metallic surface plasmon carrying layer disposed to cover a portion of said active region top surface;
- an insulating layer disposed to cover said active region sidewalls and exposed regions of said semiconducting substrate top major surface;
- and
- electrical contacts coupled to a bottom major surface of said semiconducting substrate to facilitate flowing an electrical current through the laser
- characterized in that the surface plasmon laser comprises a single mode device and the metallic surface plasmon carrying layer comprises
- a multiple layer metallic arrangement formed as a distributed feedback (DFB) grating arrangement exhibiting a periodic Bragg structure.
5 more elements
Dependencies are inferred from the claim text.