ErAs:In(Al)GaAs Terahertz Transceivers for Compact Pulsed Free Space Photonic Vector Network Analyzer
Year: 2025
Type: article
Abstract: We present ErAs:In(Al)GaAs-based terahertz transceiver modules, comprising transmitter and receiver components integrated on a single chip. The transceiver module is employed in a two-port single-path (TxRx-Rx) or 1.5-port pulsed free space photonic vector network analyzer setup, wherein the second receiver is an individual ErAs:InGaAs photoconductor. This configuration allows for simultaneous extraction of transmission and reflection coefficients or scattering parameters $$S_{21}$$ S 21 and $$S_{11}$$ S 11 . The system achieves a peak dynamic range of $$\sim $$ ∼ 59 dB for $$S_{21}$$ S 21 and $$\sim $$ ∼ 43 dB for $$S_{11}$$ S 11 at a bandwidth reaching $$\sim $$ ∼ 3.5 THz for the transmission and $$\sim $$ ∼ 2.5 THz for the reflection path. These values are obtained by averaging over 500 traces at a scan rate of 4 Hz. The system exhibits superior frequency coverage compared to commercially available electronic vector network analyzers, thus offering a compact, cost-effective, broadband characterization solution for the benchmarking of terahertz devices and components.
Authors: Fahd R. Faridi, Julian Otto, Sascha Preu
Institution: Technische Universität Darmstadt
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,990
OpenAlex ID: W4409318730