Optical Design of Laser Beam Expansion System for Explosive Laser Detection Device

Lecture notes in electrical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 285 - 296

Published: Jan. 1, 2025

Language: Английский

Research of ultra-narrow band filters based on silicon nitride subwavelength grating used in terahertz detection techniques

Physica Scripta, Journal Year: 2024, Volume and Issue: 99(7), P. 075509 - 075509

Published: June 6, 2024

Abstract As narrow-band pass filters are essential in terahertz(THz) applications, we present a ultra-narrow band based on silicon nitride subwavelength grating this paper. Through rigorous coupled wave analysis, it can be seen that the main role of each structural factor or its influence spectral response characteristics significantly different.Then, according to these laws, get design scheme by adjusting structure purposefully and pertinently. It from results theoretical reflectance at 0.55 THz reaches 99.741%, half-peak frequency range is between −171MHz +53 MHz. At same time, low sideband wide 0.2–0.8 indicates used well for signal related detection technology.

Language: Английский

Terahertz tomography for testing wrapped scintillating crystals

Radiation Physics and Chemistry, Journal Year: 2024, Volume and Issue: 226, P. 112176 - 112176

Published: Sept. 7, 2024

Language: Английский