23 August 2017 Compact solutions for spectroscopic solid-state-based terahertz imaging systems
Author Affiliations +
Convenience in use of room-temperature terahertz (THz) imaging systems, reduction of their dimensions and presence of on-chip solutions remains one of prime interests for direct implementation aims. Solid-state-based solutions in miniaturization of spectroscopic THz imaging systems including novel semiconductor nanostructures bias-free emitters, diffractive THz optics components and their on-chip integration with THz detectors are discussed. In particular, pulsed optoelectronic terahertz emitter based on a δ-doped p-i-n-i GaAs/AlxGa1−xAs heterostructure was studied and it is demonstrated that the heterostructure can serve as efficient antenna- and bias-free surface emitter. Diffractive optics elements – Fresnel zone plates –with integrated band-pass filters were simulated employing Finite-difference time domain method. Structures were fabricated using the laser direct writing and investigated using electronic THz sources and an optically pumped terahertz laser. Advantages of on-chip integration of diffractive optics and bow-tie-shaped InGaAs-based terahertz detectors are revealed via detection enhancement. Bow-tie diodes properties in frequency scale and detection sensitivity are considered and compared for different materials. Homodyne detection and imaging of low-absorbing objects at 0.6 THz are demonstrated and discussed.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rimvydas Venckevičius, Rimvydas Venckevičius, Linas Minkevičius, Linas Minkevičius, Antanas Reklaitis, Antanas Reklaitis, Vincas Tamošiūnas, Vincas Tamošiūnas, Irmantas Kašalynas, Irmantas Kašalynas, Domas Jokubauskis, Domas Jokubauskis, Dalius Seliuta, Dalius Seliuta, Bogdan Voisiat, Bogdan Voisiat, Gediminas Račiukaitis, Gediminas Račiukaitis, Gintaras Valušis, Gintaras Valušis, } "Compact solutions for spectroscopic solid-state-based terahertz imaging systems", Proc. SPIE 10383, Terahertz Emitters, Receivers, and Applications VIII, 103830S (23 August 2017); doi: 10.1117/12.2273353; https://doi.org/10.1117/12.2273353

Back to Top