Isotopic gas analysis through Purcell cavity enhanced Raman scattering
Abstract
Purcell enhanced Raman scattering (PERS) by means of a doubly resonant Fabry-Perot microcavity (mode volume ≈ 100 μm3 and finesse ≈ 30 000) has been investigated as a technique for isotopic ratio gas analysis. At the pump frequency, the resonant cavity supports a buildup of circulating power while simultaneously enabling Purcell spontaneous emission rate enhancement at the resonant Stokes frequency. The three most common isotopologues of CO2 gas were quantified, and a signal was obtained from 13C16O2 down to a partial pressure of 2 Torr. Due to its small size and low pump power needed (∼10 mW) PERS lends itself to miniaturization. Furthermore, since the cavity is resonant with the emission frequency, future improvements could allow it to serve as its own spectral analyzer and no separate spectroscopic device would be needed.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 29, 2016
- Source ID
- 10.1063/1.4943146
Entities
People
- A. J. Hopkins
- Albert Müller
- Benjamin Petrak
- Justin T. Cooper
- Kumarasiri Konthasinghe
- M. Peiris
- N. Djeu
Organizations
- Defense Threat Reduction Agency
- University of South Florida