Abstract-New Ultra-Fast Sub-Terahertz Linear Scanner for Postal Security Screening

A. V. Shchepetilnikov, P. A. Gusikhin, V. M. Muravev, G. E. Tsydynzhapov, Yu. A. Nefyodov, A. A. Dremin.  I. V. Kukushkin

https://link.springer.com/article/10.1007/s10762-020-00692-4

To meet increasingly demanding technological needs in modern security and industrial applications involving rapid close-range screening, we have developed a 100-GHz linear scanner. Having incorporated a novel approach in terahertz sensing and an advanced IMPATT-diode signal generating technique, the proposed system offers an efficient non-destructive testing (NDT) solution that is absolutely safe, fast, highly portable, and cost-effective. The test results demonstrate outstanding capability of the scanner to provide continuous, high-throughput security screening of mail. The system can perform real-time imaging with effective resolution approaching 5 mm at conveyor speeds of up to 15 m/s.

Abstract-Spectroscopy of terahertz radiation using high-Q photonic crystal microcavities

V. M. Muravev, P. A. Gusikhin, G. E. Tsydynzhapov, A. A. Fortunatov, and I. V. Kukushkin 
Institute of Solid State Physics, RAS, Chernogolovka 142432, Russia and Terasense Development Laboratories, Chernogolovka 142432, Russia

We report observation of high-Q resonance in the photoresponse of a detector embedded in the 2D photonic crystal slab (PCS) microcavity illuminated by terahertz radiation. The detector and PCS are fabricated from a single GaAs wafer in a unified process. The influence of the period of PCS lattice, microcavity geometry, and detector location on the resonant photoresponse is studied. The resonance is found to originate from coupling of the fundamental PCS microcavity photon mode to the detector. The phenomenon can be exploited to devise a spectrometer-on-a-chip for terahertz range.

©2012 American Physical Society