Analysis of a single-mode waveguide at sub-terahertz frequencies as a communication channel
MP Westig (Freie Universität Berlin, Kavli institute of nanoscience Delft, TU Delft - QN/Klapwijk Lab)
Holger Thierschmann (TU Delft - QN/Klapwijk Lab, Kavli institute of nanoscience Delft)
Allard Katan (Kavli institute of nanoscience Delft, TU Delft - QN/Afdelingsbureau)
M. Finkel (Kavli institute of nanoscience Delft, TU Delft - QN/Klapwijk Lab)
TM Klapwijk (Kavli institute of nanoscience Delft, TU Delft - QN/Klapwijk Lab)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
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.
help_outline