Enhancement of Terahertz Photoconductive Antennas and Photomixers Operation by Optical Nanoantennas

Abstract

Photoconductive antennas and photomixers are very promising sources of terahertz radiation that is widely used for spectroscopy, characterisation and imaging of biological objects, deep space studies, scanning of surfaces and detection of potentially hazardous substances. These antennas are compact and allow generation of both ultrabroadband pulse and tunable continuous wave terahertz signal at room temperatures, without a need of high-power optical sources. However, such antennas have relatively low energy conversion efficiency of femtosecond laser pulses or two close pump wavelengths (photomixer) into the pulsed and continuous terahertz radiation, correspondingly. Recently, an approach to solving this problem has been proposed, that involves known methods of nanophotonics applied to terahertz photoconductive antennas and photomixers. This approach comprises the use of optical nanoantennas for enhancing the efficiency of pump laser radiation absorption in the antenna gap, reducing the lifetime of photoexcited carriers, and improving antenna thermal efficiency. This Review is intended to systematise all the results obtained by researchers in this promising field of hybrid optical-to-terahertz photoconductive antennas and photomixers.

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Cited by in corpus (11)

• Nonlinear optics at all-dielectric nanoantennas and metasurfaces
• HBN-encapsulated, graphene-based room-temperature terahertz receivers with high speed and low noise
• Boosting the Terahertz Photoconductive Antenna Performance with Optimized Plasmonic Nanostructures
• Hybrid Nanophotonics
• Direct evidence of terahertz emission arising from anomalous Hall effect
• Multiphysics Simulation of Plasmonic Photoconductive Devices using Discontinuous Galerkin Methods
• Transfer Matrix description of heterostructured spintronics Terahertz emission
• Efficient 3-dimensional photonic-plasmonic photo-conductive switches for picosecond THz pulses
• Analysis of Screening Effects on Terahertz Photoconductive Devices using a Fully-Coupled Multiphysics Approach
• Efficient Discontinuous Galerkin Scheme for Analyzing Nanostructured Photoconductive Devices
• Semiconductor-based electron flying qubits: Review on recent progress accelerated by numerical modelling