Enhanced Delivery and Detection of Terahertz Frequency Radiation from a Quantum Cascade Laser Within Dilution Refrigerator

被引：0

作者：

M. Vaughan

W. Michailow

M. Tan

M. Salih

L. Li

H. Beere

D. A. Ritchie

E. H. Linfield

A. G. Davies

J. E. Cunningham

机构：

[1] University of Leeds,School of Electronic and Electrical Engineering

[2] University of Cambridge,Cavendish Laboratory

来源：

Journal of Low Temperature Physics | 2023年 / 213卷

关键词：

Condensed matter; Terahertz; Quantum cascade laser; 2-Dimensional electron gas; milli-Kelvin; Waveguide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We report on significant enhancements to the integration of terahertz (THz) quantum cascade lasers (QCL) and THz detection with a two-dimensional electron gas (2DEG) within a dilution refrigerator obtained by the inclusion of a multi-mesh 6 THz low-pass filter to block IR radiation, a Winston cone to focus light output, and gating the 2DEG for optimised sensitivity. We show that these improvements allow us to obtain a > 2.5 times reduced sample electron temperature (160 mK compared with 430 mK previously), during cyclotron resonance (CR) measurements of a 2DEG under QCL illumination. This opens up a route to performing sub-100 mK experiments using excitation by THz QCLs.

引用

页码：306 / 316

页数：10

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