Rapid, accurate and precise terahertz polarization modulation and ellipsometry with multi-pixel interdigitated photoconductive emitters

We demonstrate that multi-element interdigitated photoconductive emitters can rapidly and precisely modulate broadband terahertz radiation between linear (horizontal or vertical) and circular polarization states. The rapid electrical modulation between polarization states is beneficial for THz time-...

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Bibliographic Details
Main Authors: Mosley, C.D.W., Staniforth, M., Serrano, A. Hernandez, Pickwell-MacPherson, E., Lloyd-Hughes, J.
Format: Conference Proceeding
Language:English
Subjects:
Anisotropic magnetoresistance
Broadband antennas
Broadband communication
Ellipsometry
Modulation
Polarization
Spectroscopy
Online Access:Request full text
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Description
Summary:We demonstrate that multi-element interdigitated photoconductive emitters can rapidly and precisely modulate broadband terahertz radiation between linear (horizontal or vertical) and circular polarization states. The rapid electrical modulation between polarization states is beneficial for THz time-domain spectroscopic ellipsometry: it eliminates mechanical rotation and enhances the relevant figures of merit.
ISSN:2162-2035
DOI:10.1109/IRMMW-THz.2019.8874485