Selective spectral detection of continuum terahertz radiation

P. Kaufmann; R. Marcon; A. Marun; A. S. Kudaka; E. Bortolucci; M. Beny Zakia; J. A. Diniz; M. M. Cassiano; P. Pereyra; R. Godoy; A. V. Timofeevsky; V. A. Nikolaev; A. M. Pereira Alves da Silva; L. O. T. Fernandes

doi:10.1117/12.856930

15 July 2010 Selective spectral detection of continuum terahertz radiation

P. Kaufmann, R. Marcon, A. Marun, A. S. Kudaka, E. Bortolucci, M. Beny Zakia, J. A. Diniz, M. M. Cassiano, P. Pereyra, R. Godoy, A. V. Timofeevsky, V. A. Nikolaev, A. M. Pereira Alves da Silva, L. O. T. Fernandes

Author Affiliations +

Proceedings Volume 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V; 774125 (2010) https://doi.org/10.1117/12.856930
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The knowledge of THz continuum spectra is essential to investigate the emission mechanisms by high energy particle acceleration processes. Technical challenges appear for obtaining selective spectral sensing in the far infrared range to diagnose radiation produced by solar flare burst emissions measured from space as well as radiation produced by high energy electrons in laboratory accelerators. Efforts are been carried out intended for the development of solar flare high cadence radiometers at two THz frequencies to operate outside the terrestrial atmosphere (i.e. at 3 and 7 THz). One essential requirement is the efficient suppression of radiation in the visible and near infrared. Experimental setups have been assembled for testing (a) THz transmission of "low-pass" filters: rough surface mirrors; membranes Zitex G110G and TydexBlack; (b) a fabricated 2.4 THz resonant grid band-pass filter transmission response for polarization and angle of incidence; (c) radiation response from distinct detectors: adapted commercial microbolometer array using HRFZ-Si window, pyroelectric module and Golay cell; qualitative detection of solar radiation at a sub-THz frequency has been tested with a microbolometer array placed at the focus of the 1.5 m reflector for submillimeter waves (SST) at El Leoncito, Argentina Andes.

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P. Kaufmann, R. Marcon, A. Marun, A. S. Kudaka, E. Bortolucci, M. Beny Zakia, J. A. Diniz, M. M. Cassiano, P. Pereyra, R. Godoy, A. V. Timofeevsky, V. A. Nikolaev, A. M. Pereira Alves da Silva, and L. O. T. Fernandes "Selective spectral detection of continuum terahertz radiation", Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774125 (15 July 2010); https://doi.org/10.1117/12.856930

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