*Corresponding author:
Mehboob Alam, The Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, UiT - The Arctic University of Norway, Tromsø, NorwayReceived: November 07, 2017; Published: November 15, 2017
DOI: 10.26717/BJSTR.2017.01.000532
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In this mini-review, the author discusses a different view of two-photon absorption and in general any multi-photon absorption process in a molecular system in a very didactic way. This novel point of view is termed as “channel interference”. It connects the overall absorption cross section with the orientation of different transition dipole moment vectors that come into existence when a molecule undergoes two- or multiphoton absorption process. Therefore, channel interference provides an in-depth view of the process which can be used to control and fine tune the multi-photon activity in a molecular system for designing an efficient material.
Keywords: Two-photon absorption; Nonlinear optics; Response theory; Optical channels; Transition dipole moments
Abbreviations: TPA: Two-Photon Absorption; TP: Two-Photon; MPA: Multi-Photon Absorption; TDM: Transition Dipole Moment