Tunable surface plasmon devices
- Rio Rancho, NM
- Lowell, MA
A tunable extraordinary optical transmission (EOT) device wherein the tunability derives from controlled variation of the dielectric constant of a semiconducting material (semiconductor) in evanescent-field contact with a metallic array of sub-wavelength apertures. The surface plasmon resonance wavelength can be changed by changing the dielectric constant of the dielectric material. In embodiments of this invention, the dielectric material is a semiconducting material. The dielectric constant of the semiconducting material in the metal/semiconductor interfacial region is controllably adjusted by adjusting one or more of the semiconductor plasma frequency, the concentration and effective mass of free carriers, and the background high-frequency dielectric constant in the interfacial region. Thermal heating and/or voltage-gated carrier-concentration changes may be used to variably adjust the value of the semiconductor dielectric constant.
- Research Organization:
- Sandia Corporation (Albuquerque, NM)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Number(s):
- 8,009,356
- Application Number:
- 12/137,882
- OSTI ID:
- 1023917
- Country of Publication:
- United States
- Language:
- English
Electrically tunable extraordinary optical transmission gratings
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journal | October 2007 |
All-optical switching of the transmission of electromagnetic radiation through subwavelength apertures
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journal | January 2005 |
Midinfrared doping-tunable extraordinary transmission from sub-wavelength Gratings
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journal | May 2007 |
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