Broadband ultrafast terahertz spectroscopy in the 25 T Split Florida-Helix

Jeremy A Curtis; Ashlyn D Burch; Biplob Barman; A Garrison Linn; Luke M McClintock; Aidan L O'Beirne; Matthew J Stiles; John L Reno; Stephen A McGill; Denis Karaiskaj; David J Hilton

doi:10.1063/1.5023384

Broadband ultrafast terahertz spectroscopy in the 25 T Split Florida-Helix

Rev Sci Instrum. 2018 Jul;89(7):073901. doi: 10.1063/1.5023384.

Affiliations

¹ Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.
² Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
³ National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA.
⁴ Department of Physics, University of South Florida, Tampa, Florida 33620, USA.

PMID: 30068119
DOI: 10.1063/1.5023384

Abstract

We describe the development of a broadband (0.3-10 THz) optical pump-terahertz probe spectrometer with an unprecedented combination of temporal resolution (≤200 fs) operating in external magnetic fields as high as 25 T using the new Split Florida-Helix magnet system. Using this new instrument, we measure the transient dynamics in a gallium arsenide four-quantum well sample after photoexcitation at 800 nm.