On-chip integration solutions of compact optics and detectors in room-temperature terahertz imaging systems

Linas Minkevičius; Vincas Tamošiūnas; Irmantas Kašalynas; Rimvydas Venckevičius; Karolis Madeikis; Bogdan Voisiat; Dalius Seliuta; Gediminas Račiukaitis; Gintaras Valušis

doi:10.1117/12.2187921

31 August 2015 On-chip integration solutions of compact optics and detectors in room-temperature terahertz imaging systems

Linas Minkevičius, Vincas Tamošiūnas, Irmantas Kašalynas, Rimvydas Venckevičius, Karolis Madeikis, Bogdan Voisiat, Dalius Seliuta, Gediminas Račiukaitis, Gintaras Valušis

Author Affiliations +

Proceedings Volume 9585, Terahertz Emitters, Receivers, and Applications VI; 95850M (2015) https://doi.org/10.1117/12.2187921
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

On-chip integrated solutions employing properties of Fresnel zone plates with integrated band-pass filters for the room temperature terahertz imaging systems are discussed. Finite-difference time-domain simulations were used to predict properties of conventional zone plates and ones with resonant filter areas as flat optics components. They are produced employing the laser direct writing and characterized by electronic THz sources and an optically pumped terahertz laser. It was shown that more than one order of magnitude detection enhancement can be observed of bow-tie-shaped InGaAs-based terahertz detectors by on-chip incorporation of the secondary diffractive optics.

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Linas Minkevičius, Vincas Tamošiūnas, Irmantas Kašalynas, Rimvydas Venckevičius, Karolis Madeikis, Bogdan Voisiat, Dalius Seliuta, Gediminas Račiukaitis, and Gintaras Valušis "On-chip integration solutions of compact optics and detectors in room-temperature terahertz imaging systems", Proc. SPIE 9585, Terahertz Emitters, Receivers, and Applications VI, 95850M (31 August 2015); https://doi.org/10.1117/12.2187921

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