Optical concentrators for light-emitting diodes

Tim Ashley; David T. Dutton; Charles Thomas Elliott; Neil T. Gordon; T. J. Phillips

doi:10.1117/12.305488

20 April 1998 Optical concentrators for light-emitting diodes

Tim Ashley, David T. Dutton, Charles Thomas Elliott, Neil T. Gordon, T. J. Phillips

Proceedings Volume 3289, Micro-Optics Integration and Assemblies; (1998) https://doi.org/10.1117/12.305488
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

The incorporation of non-imaging optical concentrations in uncooled mid-IR LEDs is described. Novel micromachining methods are used to produce optical concentrators in the growth substrate of epitaxial InSb/InAlSb heterostructures. Resultant large area LED arrays, displaying both positive and negative luminescence, are shown to have optical gains of 3.5 over conventional mesas made form the same material. The LED technology shown also relies on the micromachined substrate being transparent to 3-5 micrometers radiation and to act as a low resistance common contact. The use of degenerate doping in InSb is described, resulting in a shift in the room-temperature transmission to the 3-5micrometers atmospheric window and providing high electrical conductivities.

Citation Download Citation

Tim Ashley, David T. Dutton, Charles Thomas Elliott, Neil T. Gordon, and T. J. Phillips "Optical concentrators for light-emitting diodes", Proc. SPIE 3289, Micro-Optics Integration and Assemblies, (20 April 1998); https://doi.org/10.1117/12.305488

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