罗丹明溶液中双光子荧光猝灭及受激反斯托克斯发射

Quenching of two-photon fluorescence and stimulated anti-Stokes emission in rhodamine solutions.

作者信息

Eichler H J, Langhans D, Klein U

出版信息

Appl Opt. 1979 May 1;18(9):1383-6. doi: 10.1364/AO.18.001383.

DOI:10.1364/AO.18.001383

PMID:20212855

Abstract

Two-photon fluorescence (TPF) has been excited in different solutions of rhodamine 6G and rhodamine B with single 30-psec pulses from a Nd:YAG laser at 1.06 microm. Up to incident intensities of 6 x 10(28)photons cm(-2) sec(-1) the TPF intensity showed a quadratic dependence on the photon flux. At higher photon fluxes the TPF intensity increased less than quadratically with the incident intensity. A possible mechanism, not considered previously, for this quenching is stimulated Raman scattering. It was observed that TPFquenching and stimulated anti-Stokes emission had thresholds in the same power range.

摘要

用波长为1.06微米的Nd:YAG激光器发出的单个30皮秒脉冲，在罗丹明6G和罗丹明B的不同溶液中激发了双光子荧光（TPF）。在高达6×10²⁸光子·厘米⁻²·秒⁻¹的入射强度下，TPF强度与光子通量呈二次方依赖关系。在更高的光子通量下，TPF强度随入射强度的增加小于二次方。一种此前未被考虑的导致这种猝灭的可能机制是受激拉曼散射。据观察，TPF猝灭和受激反斯托克斯发射在相同的功率范围内存在阈值。