Source abstract
Abstract
Herein, a simple terahertz (THz) receiver that uses subwavelength focusing of the THz beam on the detector area is proposed. As a proof of concept, a THz detection system with an original optical coupling scheme is implemented, where the signal to be detected is coupled to a THz detector through a mesoscale dielectric particle lens. Coherent detection is successfully demonstrated with an enhancement of the detector sensitivity of about 4.3 dB, compared with that of a direct detection system with the slight decreasing (≈1.67 times) of noise equivalent power value. The results show that the proposed method can reduce the size and increase the sensitivity of various THz systems, including imaging, sensing, and ranging, which would enable significant progress in different fields such as physics, medicine, biology, astronomy, security, etc.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Terahertz technology and applications · Millimeter-Wave Propagation and Modeling · Superconducting and THz Device Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Nondestructive Testing Tomsk Polytechnic University 30 Lenin Avenue Tomsk 634050 Russia
Department of Radiophysics Tomsk State University 36 Lenin Avenue Tomsk 634050 Russia
Research Institute of Electrical Communication Tohoku University Sendai Japan
Departamento de Física Aplicada Universidad de Salamanca Salamanca Spain
Departamento de Informática y Automática Universidad de Salamanca Salamanca Spain
Departamento de Comunicaciones Escuela Técnica Superior de Ingenieros de Telecomunicación Universitat Politècnica de València Valencia Spain
Funding
Agencia Estatal de Investigación · Consejería de Educación, Junta de Castilla y León · Conselleria d'Educació, Investigació, Cultura i Esport
References (29)
Show source-provided references
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