Discrete spectrum terahertz imaging using bow-tie diodes: optimized antenna designs and arrays

Linas Minkevičius; Karolis Madeikis; Irmantas Kašalynas; Rimvydas Venckevičius; Dalius Seliuta; Vincas Tamošiūnas; Gintaras Valušis

doi:10.1117/12.2023887

24 September 2013 Discrete spectrum terahertz imaging using bow-tie diodes: optimized antenna designs and arrays

Linas Minkevičius, Karolis Madeikis, Irmantas Kašalynas, Rimvydas Venckevičius, Dalius Seliuta, Vincas Tamošiūnas, Gintaras Valušis

Author Affiliations +

Proceedings Volume 8846, Terahertz Emitters, Receivers, and Applications IV; 88460P (2013) https://doi.org/10.1117/12.2023887
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Optimization routes to optimize the operation of InGaAs bow-tie diodes were demonstrated using simulations based on 3D finite-difference time-domain method. Calculations of the electromagnetic field amplitude distribution in a detector plane were performed. Three types of designs – bow-tie diode itself, log-periodic antenna and log-periodic antenna coupled with the bow-tie diode were analyzed; it was determined that frequency properties of such antennacoupled device can be tuned via variation of antenna shape and size. Multi-pixel InGaAs bow-tie diodes arrays of different designs – narrow band and broadband operation – were designed and fabricated. They were demonstrated to be well suited for continuous wave room temperature spectroscopic terahertz imaging at 0.58 THz and at 1.63 THz.

Citation Download Citation

Linas Minkevičius, Karolis Madeikis, Irmantas Kašalynas, Rimvydas Venckevičius, Dalius Seliuta, Vincas Tamošiūnas, and Gintaras Valušis "Discrete spectrum terahertz imaging using bow-tie diodes: optimized antenna designs and arrays", Proc. SPIE 8846, Terahertz Emitters, Receivers, and Applications IV, 88460P (24 September 2013); https://doi.org/10.1117/12.2023887

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