Pre-resonant Raman scattering in antracene crystals |
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Authors: | VL Broude AA Maksimov II Tartakovskii |
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Institution: | Solid State Physics Institute, Academy of Sciences of the USSR, 142432 Chernogolovka, USSR |
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Abstract: | The pre-resonant Raman scattering (PRRS) of anthracene crystals (T = 4.2?30 K) has been studied. A tunable dye laser (vexc = 25000?25100 cm-1 was used to produce an excitation close to the lowest exciton band bottom (v0 = 25097 cm-1). A sharp increase of the PRRS intensity when approaching the excitation light frequency vexc to v0 and then the not less sharp drop of the PRRS intensity close to resonance (v0 ? vexc ≈ 35?15 cm-1) where observed. An extremely high PRRS sensitivity to temperature and the excitation light intensity was found. The results are explained within the framework of stimulated PRRS in anthracene crystals. |
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