The potential of using high-Tc superconductors as intensity modulators for far-infrared radiation is investigated in this work. Reflectance and transmittance for several design structures are computed using the published optical constants of the superconductor YBa2Cu3O7 and substrate materials. Notable differences in the reflectance and transmittance between the superconducting state and the normal state are illustrated. The best results are obtained based on the reflectance of thin films (10 nm–50 nm thick) on thin substrates (less than 100 μm thick) and for radiation incident on the substrate. This study demonstrates that high-Tc superconductive thin films can be used to build far-infrared radiation modulators. Future experimental study is recommended in order to materialize this promising thermo-optical device.
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Far-Infrared Radiation Modulators Using High-Tc Superconductors
Z. M. Zhang
Z. M. Zhang
Department of Mechanical Engineering, University of Florida, P.O. Box 116300, Gainesville, FL 32611-6300
e-mail: zzhang@cimar.me.ufl.edu
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Z. M. Zhang
Department of Mechanical Engineering, University of Florida, P.O. Box 116300, Gainesville, FL 32611-6300
e-mail: zzhang@cimar.me.ufl.edu
J. Heat Transfer. Feb 1998, 120(1): 24-29 (6 pages)
Published Online: February 1, 1998
Article history
Received:
September 17, 1996
Revised:
October 31, 1997
Online:
January 7, 2008
Citation
Zhang, Z. M. (February 1, 1998). "Far-Infrared Radiation Modulators Using High-Tc Superconductors." ASME. J. Heat Transfer. February 1998; 120(1): 24–29. https://doi.org/10.1115/1.2830049
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