Demonstration of an Integrated Terahertz Band-Stop Filter Using an Apodized Bragg Grating

TL;DR

This paper demonstrates an integrated Terahertz band-stop filter using an apodized Bragg grating, achieving significant signal rejection and integration into a THz system-on-chip for wideband characterization.

Contribution

The work introduces an on-chip integrated THz band-stop filter based on an apodized Bragg grating, with experimental validation aligning with theoretical predictions.

Findings

Achieved 20 dB rejection across the stop-band.

Successfully integrated the filter into a THz system-on-chip.

Validated experimental results with simulations and theory.

Abstract

This paper presents the demonstration of an on-chip integrated Terahertz (THz) Apodized Bragg grating (TABG) which functions as band-stop filter with a center frequency of 0.8 THz and a bandwidth of 200 GHz. For experimentation, we integrate the TABG into our THz System-on-Chip to enable wideband (DC - 1.5 THz) device characterization. Using this methodology, we measure the signal transmission through the TABG and find the experimental results align with simulation and theory provides a rejection of approximately 20 dB across the stop-band.