Coherent light generators – Long wavelength
Reexamination Certificate
2007-10-23
2007-10-23
Harvey, Minsun (Department: 2828)
Coherent light generators
Long wavelength
C372S045010, C372S045012, C257S014000, C257S184000, C977S755000, C977S758000, C977S820000
Reexamination Certificate
active
10923160
ABSTRACT:
A method for converting a Type 2 quantum well semiconductor material to a Type 1 material. A second layer of undoped material is placed between first and third layers of selectively doped material, which are separated from the second layer by undoped layers having small widths. Doping profiles are chosen so that a first electrical potential increment across a first layer-second layer interface is equal to a first selected value and/or a second electrical potential increment across a second layer-third layer interface is equal to a second selected value. The semiconductor structure thus produced is useful as a laser material and as an incident light detector material in various wavelength regions, such as a mid-infrared region.
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Golub Marcia A.
Harvey Minsun
Padilla Robert M.
Schipper John F.
United States of America as Represented by the Administrator of
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