A dual-port THz Time Domain Spectroscopy System optimized for recovery of a sample’s Jones matrix

Abstract

We describe the design, build and characterization of a novel two-output port configuration for a THz-Time Domain Spectroscopy (TDS) system. By introducing a tilted THz ultra-broadband polarizer, we split the THz beam in two orthogonal polarization detector branches. The probe laser is similarly split (with an optical polarizer) replicating the detection chain to obtain two independent orthogonal polarization detection units. We describe the system’s performance highlighting some of the advantages of this system in one of its two modes of operation: optimized polarimetry for Jones matrix measurements. A bi-refringent sapphire standard was measured to confirm its capabilities and assess the performance of the system showing good agreement with existing literature data.

Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology

“…However, the recent technological advancements in optics and electronics, advances in terahertz systems utilizing mode-locked femtosecond fiber lasers, together with advances in emitters and receivers, have led to progress in this field [1]. The use of terahertz transmission mode has a number of significant applications spectroscopy [2], lenses [3], security [5], bio-imaging [6], photonic crystals [7]- [9], high bandwidth communications [10] and biological sensing [11]- [13]. One of the emerging applications of terahertz spectroscopy is to characterize the optical properties of a wide…”

Terahertz Time-Domain Polarimetry for Principal Optical Axes of Anisotropic Crystals

“…One approach relies on detectors that are capable of sensing two orthogonal polarizations simultaneously. This is achieved by using either two separate electro-optic detectors [5][6][7] or three-or four-contact photoconductive antennas (as opposed to conventional two-contact units) [8][9][10][11]. The inherent dependence of electro-optic detection sensitivity on the polarization of terahertz and probe laser radiation can also be employed [12,13].…”

Review on polarimetric terahertz spectroscopy

“…Gong et al developed several kinds of achromatic THz waveplate, 14‐16 they also made lots of investigations relevant to THz polarization with metasurface 17‐21 . Prof. Xi‐cheng Zhang and Capital Normal University demonstrated THz polarization imaging by using CCD 22,23 . RIKEN Japan collaborated with Singapore and also did exploration on the polarimetric THz‐FDS 24,25 .…”