Improving the performance of THz delivery from a quantum cascade laser within a dry 3He dilution refrigerator
- Resource Type
- Conference
- Authors
- Vaughan, M.; Michailow, W.; Tan, M.; Salih, M.; Li, L.; Beere, H.; Ritchie, D. A.; Linfield, E. H.; Davies, A.G.; Cunningham, J. E.
- Source
- 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2023 48th International Conference on. :1-2 Sep, 2023
- Subject
- Aerospace
Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Signal Processing and Analysis
Low-pass filters
Waveguide lasers
HEMTs
Quantum cascade lasers
MODFETs
Cyclotrons
- Language
- ISSN
- 2162-2035
We demonstrate a substantial enhancement to the integration of a quantum cascade laser into a dilution refrigerator via waveguides by the inclusion of a multi-mesh 6THz low-pass filter to block IR radiation, and a Winston cone to focus light output from the waveguide. These alterations allow us to lower the base temperatures to $\sim 114$ mK, and the sample temperature to $\sim 160$ mK while detecting a cyclotron resonance (CR) response in a 2DEG illuminated within the refrigerator. For comparison, before these changes we achieve a base temperature of 206mK and an effective sample temperature of 430mK while detecting CR [1].