Terahertz spatial light modulator with more than 1 THz working range

J. Kappa; D. Sokoluk; S. Klingel; C. Shemelya; E. Oesterschulze; M. Rahm

doi:10.1117/12.2529205

6 September 2019 Terahertz spatial light modulator with more than 1 THz working range

J. Kappa, D. Sokoluk, S. Klingel, C. Shemelya, E. Oesterschulze, M. Rahm

Proceedings Volume 11124, Terahertz Emitters, Receivers, and Applications X; 111240W (2019) https://doi.org/10.1117/12.2529205
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

We present a terahertz-SLM with a frequency working range from 1.0 THz to 2.3 THz. Over the complete frequency range, the spatial modulation contrast exceeds 50% with a peak modulation contrast of 87% at 1.38 THz. The pixels of the SLM consist of mirror arrays that can be selectively actuated by a bias voltage of 35 V. Each individual pixel can either work as a grating, that diffracts terahertz radiation away from the detector, or as a flat mirror, that reflects all terahertz radiation into the detector. The mirrors have a size of 220 μm x 100 μm. Due to the wide frequency working bandwidth of more than 1 THz, such modulators can be used as spatial light modulators in terahertz coded aperture imaging spectroscopes with single-pixel detectors.

Citation Download Citation

J. Kappa, D. Sokoluk, S. Klingel, C. Shemelya, E. Oesterschulze, and M. Rahm "Terahertz spatial light modulator with more than 1 THz working range", Proc. SPIE 11124, Terahertz Emitters, Receivers, and Applications X, 111240W (6 September 2019); https://doi.org/10.1117/12.2529205

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