Abstract
Spectral and transient behaviors of resonant secondary emission in NaNO 2 are studied with exciting light ν i around the zero-phonon absorption line at ν 00=25975±2 cm −1. In the region ν i≲ν 00, the emission spectrum consists of multiple-order scattering lines due to the bending vibration of NO 2 −. Each line shifts in parallel with the change in ν i. Time response of each emission line can be resolved into short-lived and long-lived components which correspond to Raman scattering and luminescence, respectively. The intensity ratio of the long-lived component to the short-lived one is found to decrease with increase in the detuning frequency Δν indicating the non-motional-narrowing effect in the second order optical process. In the region ν i≳ν 00, each emission line splits into Raman-like and luminescence-like components spectrally. The latter has the property of ordinary luminescence, while the former shows the characteristics of hot luminescence.
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