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Applied Physics Letters / Volume 100 / Issue 6 / PHOTONICS AND OPTOELECTRONICS

Appl. Phys. Lett. 100, 061105 (2012); http://dx.doi.org/10.1063/1.3682517 (4 pages)

Analysis of Gouy phase shift for optimizing terahertz air-biased-coherent-detection

Huanyu He1 and X.-C. Zhang2

1Center for Terahertz Research, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
2The Institute of Optics, University of Rochester, Rochester, New York 14627-0186, USA

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(Received 17 December 2011; accepted 18 January 2012; published online 6 February 2012)

Terahertz (THz) air-biased-coherent-detection (ABCD) uses a local oscillator to enhance THz-wave detection sensitivity by mixing an optical field, a THz field, and a biased electric field (local oscillator) in air. The width of the electrodes providing the local oscillator, the longitudinal distribution of the optical and THz waves, both play important roles in the overall detection sensitivity. By analyzing the effect of the Gouy phase shift on the electric field distribution at the mixing location, we determine the optimal electrode width and observe an enhancement of the detection efficiency by a factor of two relative to the traditional THz-ABCD system using thin-wire electrodes.

© 2012 American Institute of Physics

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KEYWORDS, PACS, and IPC

Keywords

electrodes, optimisation, oscillators, terahertz wave detectors

PACS

  • 84.40.-x

    Radiowave and microwave (including millimeter wave) technology

  • 07.57.Pt

    Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques

  • 84.30.Ng

    Oscillators, pulse generators, and function generators

International Patent Classification (IPC)

  • H03B

    Generation of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner; Generation of noise by such circuits

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3682517

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    N. Karpowicz, J. Dai, X. Lu, Y. Chen, M. Yamaguchi, H. Zhao, X.-C. Zhang, L. Zhang, C. Zhang, M. Price-Gallagher, C. Fletcher, O. Mamer, A. Lesimple, and K. Johnson, Appl. Phys. Lett. 92(1), 011131 (2008)APPLAB000092000001011131000001.

    A. Nahata, A. S. Weling, and T. F. Heinz, Appl. Phys. Lett. 69(16), 2321 (1996)APPLAB000069000016002321000001.

    J. Dai, X. Xie, and X.-C. Zhang, Phys. Rev. Lett. 97(10), 103903 (2006).

    H. Hamster, A. Sullivan, S. Gordaon, and R. W. Falcone, Phys. Rev. E 49(1), 671 (1994).


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