title: A study of local heating of molecules under surface enhanced Raman scattering (SERS) conditions using the anti-Stokes/Stokes ratio.
abstract: We make systematic measurements of the anti-Stokes/Stokes (aS/S) ratios using low power lasers (0.5 mW at 514 and 633 nm) of rhodamine 6G (RH6G) on dried silver colloids over a wide range of temperatures from 140 to 350 K. We show that a scan in temperature allows the extraction of the contributions to the anti-Stokes/Stokes ratio from resonance effects and heating independently, thus decoupling the two aspects of the problem.
authors.affiliation: The Blackett Laboratory, Imperial College London, Prince Consort Road, London, UK. Robert.Maher@imperial.ac.uk
authors.forename: R C
authors.initials: RC
authors.lastname: Maher
authors.forename: L F
authors.initials: LF
authors.lastname: Cohen
authors.forename: E C
authors.initials: EC
authors.lastname: Le Ru
authors.forename: P G
authors.initials: PG
authors.lastname: Etchegoin