22 February 2013 Photon absorption in step-wise multi-photon activation fluorescence (SMPAF) of Sepia melanin
Author Affiliations +
Abstract
Previous research has shown that melanin goes through a step-wise three-photon absorption process when the fluorescence is activated with high laser intensity. We have conducted further research using even higher laser intensity for the activation, and have shown the possibility of observing power dependence other than third-order. This article discusses the possible energy states of Sepia melanin by studying the power dependence curves of the step-wise multi-photon activated fluorescence signal. Three different excitation channels are activated. Possible reasons causing the three channels are discussed.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhenhua Lai, Zhenhua Lai, Josef Kerimo, Josef Kerimo, Charles DiMarzio, Charles DiMarzio, } "Photon absorption in step-wise multi-photon activation fluorescence (SMPAF) of Sepia melanin ", Proc. SPIE 8588, Multiphoton Microscopy in the Biomedical Sciences XIII, 85881I (22 February 2013); doi: 10.1117/12.2001384; https://doi.org/10.1117/12.2001384
PROCEEDINGS
6 PAGES


SHARE
Back to Top