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

doi:10.1063/1.5128451

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 electromagnetic 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 quantum channel.

Original language	English
Article number	015008
Number of pages	12
Journal	AIP Advances
Volume	10
Issue number	1
DOIs	https://doi.org/10.1063/1.5128451
Publication status	Published - 2020

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abstract = "We study experimentally the transmission of an electromagnetic 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 quantum channel.",

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AU - Katan, Allard

AU - Finkel, Matvey

AU - Klapwijk, Teun M.

PY - 2020

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AB - We study experimentally the transmission of an electromagnetic 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 quantum channel.

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

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