Free-space detection of terahertz radiation using crystalline and polycrystalline ZnSe electro-optic sensors

We present an experimental investigation demonstrating the use of single-crystal and polycrystalline ZnSe for the detection of freely propagating terahertz (THz) radiation. It is found that polycrystalline ZnSe electro-optic sensors exhibit preferred crystallographic orientations and can provide hig...

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Bibliographic Details
Published in:Applied physics letters 2002-09, Vol.81 (12), p.2294-2296
Main Authors: Holzman, J. F., Vermeulen, F. E., Irvine, S. E., Elezzabi, A. Y.
Format: Article
Language:English
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Summary:We present an experimental investigation demonstrating the use of single-crystal and polycrystalline ZnSe for the detection of freely propagating terahertz (THz) radiation. It is found that polycrystalline ZnSe electro-optic sensors exhibit preferred crystallographic orientations and can provide high bandwidth detection capabilities. The polycrystalline grain size and orientation are shown to be important in detecting distortion-free THz wave forms. By proper choice of the polycrystalline sensor thickness, a THz detection bandwidth comparable to that obtained with a single-crystal sensor is demonstrated. The application of polycrystalline material for free-space electro-optic sampling (FS–EOS) permits the possibility of utilizing nonlattice-matched thin-film integrated THz FS–EOS sensors and generators.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1508435