High extinction ratio terahertz wire-grid polarizers with connecting bridges on quartz substrates | Zendy

John S. Cetnar | Zendy; Shivashankar Vangala | Zendy; Weidong Zhang | Zendy; Carl Pfeiffer | Zendy; E. R. Brown | Zendy; Junpeng Guo | Zendy

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High extinction ratio terahertz wire-grid polarizers with connecting bridges on quartz substrates

Author(s) -

John S. Cetnar,

Shivashankar Vangala,

Weidong Zhang,

Carl Pfeiffer,

E. R. Brown,

Junpeng Guo

Publication year - 2017

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.42.000955

Subject(s) - polarizer , optics , extinction ratio , terahertz radiation , materials science , quartz , terahertz spectroscopy and technology , extinction (optical mineralogy) , optoelectronics , physics , birefringence , wavelength , composite material

A terahertz (THz) wire-grid polarizer with metallic bridges on a quartz substrate was simulated, fabricated, and tested. The device functions as a wide-band polarizer to incident THz radiation. In addition, the metallic bridges permit the device to function as a transparent electrode when a DC bias is applied to it. Three design variations of the polarizer with bridges and a polarizer without bridges were studied. Results show the devices with bridges have average s-polarization transmittance of less than -3 dB and average extinction ratios of approximately 40 dB across a frequency range of 220-990 GHz and thus are comparable to a polarizer without bridges.

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