Scalable interdigitated photoconductive emitters for the electrical modulation of terahertz beams with arbitrary linear polarization

A multi-element interdigitated photoconductive emitter for broadband THz polarization rotation is proposed and experimentally verified. The device consists of separate pixels for the emission of horizontally and vertically polarized THz radiation. The broadband (0.3–5.0 THz) nature of the device is...

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Bibliographic Details
Published inAIP advances Vol. 9; no. 4; pp. 045323 - 045323-6
Main Authors Mosley, C. D. W., Staniforth, M., Serrano, A. I. Hernandez, Pickwell-MacPherson, E., Lloyd-Hughes, J.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 01.04.2019
AIP Publishing LLC
Subjects
Broadband
Ellipsometry
Emitters
Far fields
Linear polarization
Modulation
Pixels
Rotation
Vertical polarization
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Summary:A multi-element interdigitated photoconductive emitter for broadband THz polarization rotation is proposed and experimentally verified. The device consists of separate pixels for the emission of horizontally and vertically polarized THz radiation. The broadband (0.3–5.0 THz) nature of the device is demonstrated, and the polarization angle of the generated far-field THz radiation is shown to be readily controlled by varying the relative bias voltage applied to the horizontally and vertically emitting pixels. The device is scalable in design, and with its simple method of polarization rotation it allows the modulation of the generated THz polarization at rates significantly faster than those achievable in ellipsometry systems based on mechanically rotating components.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5086428