Monolithic Multi-parameter Terahertz Nano-micro Detector Based on Plasmon Polariton Atomic Cavity

TL;DR

This paper introduces a monolithic, miniaturized terahertz detector based on plasmon polariton atomic cavities made from graphene, capable of multi-parameter detection with high resolution and rapid response at room temperature.

Contribution

It presents the design and demonstration of a novel graphene-based plasmon polariton atomic cavity detector with multi-parameter sensing capabilities at terahertz frequencies.

Findings

Achieves detection across 0.22 to 4.24 THz at room temperature.

Footprint is only one-tenth of the incident wavelength.

Enables applications in THz communication and stealth imaging.

Abstract

Terahertz signals hold significant potential for ultra-wideband communication and high-resolution radar, necessitating miniaturized detectors capable of multi-parameter detection of intensity, frequency, polarization, and phase. Conventional detectors cannot meet these requirements. Here, we propose plasmon polariton atomic cavities (PPAC) made from single-atom-thick graphene, demonstrating the monolithic multifunctional miniaturized detector. With a footprint one-tenth the incident wavelength, the detector offers benchmarking intensity-, frequency-, and polarization-sensitive detection, rapid response, and sub-diffraction spatial resolution, all operating at room temperature across 0.22 to 4.24 THz. We present the monolithic detection applications for free-space THz polarization-coded communication and stealth imaging of physical properties. These results showcase the PPAC's unique ability to achieve strong absorption and weak signal detection with a thickness of only 10^-5 of the excitation wavelength, which is inaccessible with other approaches.