Sub-THz 시간축 분광 시스템을 이용한 D-band 대역 분광연구

Abstract

Sub-THz (terahertz, 10(12) Hz) time-domain spectroscopy (TDS) system was developed to analyze the optical properties of materials within the D-band (110-170 GHz) frequency range. By directly measuring both the amplitude and phase of the electric field in the time domain, the complex refractive indices and absorption coefficients of polytetrafluoroethylene, crystalline quartz, and sapphire samples were extracted. The TDS system provides several advantages, including broad bandwidth, fast acquisition, and the capability to determine complex dielectric properties without the need for reference samples. These features highlight its potential for applications in telecommunications, biosensing, and semiconductor inspection.