Identification and Role of Two-Photon Excited States in a π -Conjugated Polymer
作者： B. Lawrence , W. E. Torruellas , M. Cha , M. L. Sundheimer , G. I. Stegeman
DOI: 10.1103/PHYSREVLETT.73.597
关键词:
摘要: We have measured the full two-photon absorption (TPA) spectrum in transparency range of single-crystal polydiacetylene paratoluene-sulfonate (PTS) using $z$ scan. The consists three well-defined excited states superimposed on a continuum even-parity states. Comparison TPA and one-photon spectra identifies accessible state as lowest PTS. accompanying dispersion intensity-dependent refractive index coefficient ${n}_{2}$ is also reported.
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