Rapid Scanning Terahertz Time-Domain Magnetospectroscopy with a Table-Top Repetitive Pulsed Magnet

TL;DR

This paper introduces a rapid scanning terahertz time-domain magnetospectroscopy system that combines a compact pulsed magnet with a high-speed spectrometer, enabling detailed studies of high-field magneto-optical phenomena.

Contribution

It presents a novel, integrated setup that allows quick, high-resolution terahertz magnetospectroscopy using a table-top pulsed magnet and electronically coupled optical sampling.

Findings

Measured coherent cyclotron resonance oscillations in GaAs 2DEG

Observed terahertz transmittance changes in n-InSb magnetoplasma

Demonstrated high-field magneto-optical measurement capabilities

Abstract

We have performed terahertz time-domain magnetospectroscopy by combining a rapid scanning terahertz time-domain spectrometer based on the electronically coupled optical sampling method with a table-top mini-coil pulsed magnet capable of producing magnetic fields up to 30 T. We demonstrate the capability of this system by measuring coherent cyclotron resonance oscillations in a high-mobility two-dimensional electron gas in GaAs and interference-induced terahertz transmittance modifications in a magnetoplasma in lightly doped n-InSb.