Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays

John D. Perkins; Charles W. Teplin; Maikel F.A.M. Van Hest; Chollada Warmsingh; David S. Ginley; Scott R. Harris

doi:10.1109/AERO.2003.1236130

Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays

John D. Perkins, Charles W. Teplin, Maikel F.A.M. Van Hest, Chollada Warmsingh, David S. Ginley, Scott R. Harris

Materials, Chemical, and Computational Science

Research output: Contribution to conference › Paper › peer-review

2 Scopus Citations

Abstract

Transparent conducting oxides are used as a contacting layer to liquid crystal (LC) based single wavelength optical phased array (OPA) infrared beam steerers. To investigate TCO optimization for this application, a numerical model based on the Drude (heelectron) theory is used to calculate the optical absorption at 1550 nm for layers with a fixed sheet resistance, Rs, as a function of conducting electron concentration and carrier mobility. For fixed Rs, carrier mobility is found to be the critical parameter. In short, increased mobility allows for reduced carrier concentration and hence less absorption for a given sheet resistance. For Rs = 3000 QISq., as is used in current prototype LC-OPA devices, the use of high conductivity commercial IT0 would require using a very thin, - 1 nm thick, IT0 layer. However, the conventionally worse TCO Zn-Sn-0 has good mobility but with a much lower carrier concentration than IT0 which allows for a more robust layer thickness of 20 nm while still keeping the absorption minimal

Original language	American English
Pages	1823-1829
Number of pages	7
DOIs	https://doi.org/10.1109/AERO.2003.1236130 https://doi.org/10.1109/AERO.2003.1236130
State	Published - 2003
Event	2003 IEEE Aerospace Conference - Big Sky, MT, United States Duration: 8 Mar 2003 → 15 Mar 2003

Conference

Conference	2003 IEEE Aerospace Conference
Country/Territory	United States
City	Big Sky, MT
Period	8/03/03 → 15/03/03

NREL Publication Number

NREL/CP-5200-60303

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Perkins, J. D., Teplin, C. W., Van Hest, M. F. A. M., Warmsingh, C., Ginley, D. S., & Harris, S. R. (2003). Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays. 1823-1829. Paper presented at 2003 IEEE Aerospace Conference, Big Sky, MT, United States. https://doi.org/10.1109/AERO.2003.1236130, https://doi.org/10.1109/AERO.2003.1236130

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title = "Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays",

abstract = "Transparent conducting oxides are used as a contacting layer to liquid crystal (LC) based single wavelength optical phased array (OPA) infrared beam steerers. To investigate TCO optimization for this application, a numerical model based on the Drude (heelectron) theory is used to calculate the optical absorption at 1550 nm for layers with a fixed sheet resistance, Rs, as a function of conducting electron concentration and carrier mobility. For fixed Rs, carrier mobility is found to be the critical parameter. In short, increased mobility allows for reduced carrier concentration and hence less absorption for a given sheet resistance. For Rs = 3000 QISq., as is used in current prototype LC-OPA devices, the use of high conductivity commercial IT0 would require using a very thin, - 1 nm thick, IT0 layer. However, the conventionally worse TCO Zn-Sn-0 has good mobility but with a much lower carrier concentration than IT0 which allows for a more robust layer thickness of 20 nm while still keeping the absorption minimal",

author = "Perkins, {John D.} and Teplin, {Charles W.} and {Van Hest}, {Maikel F.A.M.} and Chollada Warmsingh and Ginley, {David S.} and Harris, {Scott R.}",

year = "2003",

doi = "10.1109/AERO.2003.1236130",

language = "American English",

pages = "1823--1829",

note = "2003 IEEE Aerospace Conference ; Conference date: 08-03-2003 Through 15-03-2003",

}

Perkins, JD, Teplin, CW, Van Hest, MFAM, Warmsingh, C, Ginley, DS & Harris, SR 2003, 'Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays', Paper presented at 2003 IEEE Aerospace Conference, Big Sky, MT, United States, 8/03/03 - 15/03/03 pp. 1823-1829. https://doi.org/10.1109/AERO.2003.1236130, https://doi.org/10.1109/AERO.2003.1236130

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T1 - Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays

AU - Perkins, John D.

AU - Teplin, Charles W.

AU - Van Hest, Maikel F.A.M.

AU - Warmsingh, Chollada

AU - Ginley, David S.

AU - Harris, Scott R.

PY - 2003

Y1 - 2003

N2 - Transparent conducting oxides are used as a contacting layer to liquid crystal (LC) based single wavelength optical phased array (OPA) infrared beam steerers. To investigate TCO optimization for this application, a numerical model based on the Drude (heelectron) theory is used to calculate the optical absorption at 1550 nm for layers with a fixed sheet resistance, Rs, as a function of conducting electron concentration and carrier mobility. For fixed Rs, carrier mobility is found to be the critical parameter. In short, increased mobility allows for reduced carrier concentration and hence less absorption for a given sheet resistance. For Rs = 3000 QISq., as is used in current prototype LC-OPA devices, the use of high conductivity commercial IT0 would require using a very thin, - 1 nm thick, IT0 layer. However, the conventionally worse TCO Zn-Sn-0 has good mobility but with a much lower carrier concentration than IT0 which allows for a more robust layer thickness of 20 nm while still keeping the absorption minimal

AB - Transparent conducting oxides are used as a contacting layer to liquid crystal (LC) based single wavelength optical phased array (OPA) infrared beam steerers. To investigate TCO optimization for this application, a numerical model based on the Drude (heelectron) theory is used to calculate the optical absorption at 1550 nm for layers with a fixed sheet resistance, Rs, as a function of conducting electron concentration and carrier mobility. For fixed Rs, carrier mobility is found to be the critical parameter. In short, increased mobility allows for reduced carrier concentration and hence less absorption for a given sheet resistance. For Rs = 3000 QISq., as is used in current prototype LC-OPA devices, the use of high conductivity commercial IT0 would require using a very thin, - 1 nm thick, IT0 layer. However, the conventionally worse TCO Zn-Sn-0 has good mobility but with a much lower carrier concentration than IT0 which allows for a more robust layer thickness of 20 nm while still keeping the absorption minimal

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ER -

Optimization of Transparent Conducting Oxides for Liquid Crystal Based Optical Phased Arrays

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