Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2007-02-20
2007-02-20
Ben, Loha (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S240000, C359S245000, C359S321000, C359S263000, C359S278000, C257S012000, C257S014000, C257S017000, C257S020000, C257S021000, C257S079000, C257S431000, C372S026000, C372S045010, C372S050100, C372S050110, C398S183000
Reexamination Certificate
active
11151610
ABSTRACT:
An electro-absorption light intensity modulator device is provided that comprises a first and a second layer disposed relative to the first layer so as to provide a light-absorbing optical confinement region. The first layer comprises a first insulator layer, and the light-absorbing optical confinement region comprises at least one quantum-confined structure. The at least one quantum-confined structure possesses dimensions such, that upon an application of an electric field in the at least one quantum-confined structure, light absorption is at least partially due to a transition of at least one carrier between a valence state and a conduction state of the at least one quantum-confined structure. A method is also provided for fabricating an electro-absorption light intensity modulator device. The method comprises providing a first insulator layer, disposing a light absorption region over the first insulator layer, and disposing a second insulator layer over the light absorption region, wherein light absorption region comprises at least one quantum-confined structure. The at least one quantum-confined structure possesses dimensions such that, upon an application of an electric field in the at least one quantum-confined structure, light absorption is at least partially due to a transition of at least one carrier between a valence state and a conduction state of the at least one quantum-confined structure.
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Dohrman Carl
Fitzgerald Eugene A.
Gupta Saurabh
Ben Loha
Massachusetts Institute of Technology
Wolf Greenfield & Sacks P.C.
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