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arXiv · 1909.08976

Analysis of a single-mode waveguide at sub-terahertz frequencies as a communication channel

Marc Westig·Holger Thierschmann·Allard Katan·Matvey Finkel·Teun M. Klapwijk
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Abstract

We study experimentally the transmission of an electro-magnetic waveguide in the frequency range from 160 to 300 GHz. Photo-mixing is used to excite and detect the fundamental TE10 mode in a rectangular waveguide with two orders-of-magnitude lower impedance. The large impedance mismatch leads to a strong frequency dependence of the transmission, which we measure with a high-dynamic range of up to 80 dB, and with high frequency-resolution. The modified transmission function is directly related to the information rate of the waveguide, which we estimate to be about 1 bit per photon. We suggest that the results are applicable to a Josephson junction employed as a single-photon source and coupled to a superconducting waveguide to achieve a simple on-demand narrow-bandwidth free-space number-state channel.

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Marc Westig, Holger Thierschmann, Allard Katan, Matvey Finkel, Teun M. Klapwijk. 2019-09-19. Analysis of a single-mode waveguide at sub-terahertz frequencies as a communication channel. https://doi.org/10.1063/1.5128451

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