I(2)-vapor notch filter with optical multichannel detection of low-frequency-shift inelastic scattering from...

An I(2)-vapor cell filter and an optical multichannel analyzer were used to investigate inelastic scattering with low-frequency shifts from a Ag electrode that is surface-enhanced Raman-scattering active. We have extended inelastic scattering measurements to ~0.5 cm(-1) from the excitation frequency and have simultaneously monitored the spectral intensity from +60 to -60 cm(-). Attenuation measurements and the observation of I(2)-vapor absorption lines in the data verify that the observed signal is inelastic scattering and not the leakage of elastically scattered light.