Two-photon excited coherence gratings in inhomogeneously broadened organic solid

被引:13
作者
Karotki, A [1 ]
Kruk, M
Drobizhev, M
Rebane, A
机构
[1] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA
[2] Natl Acad Sci, Inst Atom & Mol Phys, Minsk 220072, BELARUS
[3] PN Lebedev Phys Inst, Moscow 117924, Russia
关键词
D O I
10.1080/09500340110088605
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
For the first time a frequency-domain grating is observed in the visible region as a result of coherence excited by two-photon absorption of time-delayed near-IR femtosecond pulses in an inhomogeneously broadened organic solid-state system. The grating appears in chlorin (2,3-dihydroporphyrin)doped polymer film at low temperature and is detected in two different ways. First, modulation is observed in the pure electronic fluorescence band upon 'resonant' two-photon excitation with laser carrier frequency equal to one-half of the fluorescence band maximum. Second, upon long exposure time at half of the transition frequency, a persistent spectral hole with periodic structure is observed. The two-photon absorption spectrum of the chlorin molecule in the spectral range 1130-1310 nm is also presented for the first time.
引用
收藏
页码:379 / 390
页数:12
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