Novel photoconductive antennas based on rhodium doped InGaAs with 637 µW emitted THz power

Robert B. Kohlhaas; Steffen Breuer; Lars Liebermeister; Simon Nellen; Milan Deumer; Martin Schell; Björn Globisch

doi:10.1117/12.2582964

5 March 2021 Novel photoconductive antennas based on rhodium doped InGaAs with 637 μW emitted THz power

Robert B. Kohlhaas, Steffen Breuer, Lars Liebermeister, Simon Nellen, Milan Deumer, Martin Schell, Björn Globisch

Proceedings Volume 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV; 116851K (2021) https://doi.org/10.1117/12.2582964
Event: SPIE OPTO, 2021, Online Only

Abstract

We present novel photoconductive antennas (PCAs) compatible with 1550 nm excitation for terahertz (THz) time-domain spectroscopy (TDS). Rhodium (Rh) doped InGaAs grown by molecular beam epitaxy is used as the underlying photoconductor. Due to the advantageous combination of sub-picosecond carrier lifetime and excellent electronic properties, InGaAs:Rh based emitters feature an unprecedented emitted THz power of 637 µW. A record peak dynamic range of 110 dB is demonstrated with a THz TDS system using InGaAs:Rh based PCAs only. This sets a new benchmark for THz TDS systems operating at 1550 nm.

Conference Presentation

Citation Download Citation

Robert B. Kohlhaas, Steffen Breuer, Lars Liebermeister, Simon Nellen, Milan Deumer, Martin Schell, and Björn Globisch "Novel photoconductive antennas based on rhodium doped InGaAs with 637 μW emitted THz power", Proc. SPIE 11685, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XIV, 116851K (5 March 2021); https://doi.org/10.1117/12.2582964

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