School of Physics and Astronomy

Development of Room-temperature zero-field organic solid-state masers

9 October 2015

Time: 1:30pm
Venue: GO Jones Room 410

Series: 
PPRC Seminars
Speaker: 
Ben Richards (Queen Mary)
Host: 
Teppei Katori
 
Abstract: 

The invention of the laser has resulted in many innovations, and the device has become ubiquitous. However, the maser, which amplifies microwave radiation rather than visible light, has not had as large an impact, despite being instrumental in the laser’s birth. The maser’s relative obscurity has mainly been due to the inconvenience of the operating conditions needed for its various realizations: atomic and free-electron masers require vacuum chambers and pumping; and solid-state masers, although they excel as low-noise amplifiers and are occasionally incorporated in ultrastable oscillators, typically require cryogenic refrigeration. Most realizations of masers also require strong magnets, magnetic shielding or both. Overcoming these various obstacles would pave the way for improvements such as more-sensitive chemical assays, more-precise determinations of biomolecular structure and function, and more-accurate medical diagnostics (including tomography) based on enhanced magnetic resonance spectrometers incorporating maser amplifiers and oscillators. In this seminar i will discuss the steps taken to develop and build the worlds first room-temperature zero-field maser and the current research to improve and perfect its design.

Slides can be found here: https://indico.ph.qmul.ac.uk/indico/conferenceDisplay.py?confId=58