Electrical control of terahertz frequency conversion from time-varying surfaces

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We investigate the electrical control of frequency conversion from a time-varying interdigitated photo-conductive antenna (IPCA) and time-varying metasurface in the terahertz (THz) frequency range. Ultrafast near-infrared (NIR) optical pulses rapidly modify the conductivities of the IPCA and metasurface; however, external voltages can retard this conductivity transition. Thus, external voltages can be used to control the frequency conversion process based on the interaction between the THz waves and the time-varying surfaces. In the IPCA, both frequency up- and down-conversion processes are suppressed by external voltages. However, in the metasurface, the down-conversion is dramatically suppressed by external voltages, whereas the suppression on the up-conversion is less effective. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Publisher
OPTICAL SOC AMER
Issue Date
2019-04
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.27, no.9, pp.12762 - 12773

ISSN
1094-4087
DOI
10.1364/OE.27.012762
URI
http://hdl.handle.net/10203/262694
Appears in Collection
ME-Journal Papers(저널논문)PH-Journal Papers(저널논문)
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