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Channel interference in multiphoton absorption
Md Mehboob Alam1, Maarten T P Beerepoot1, Kenneth Ruud1
1Centre for Theoretical and Computational Chemistry, Department of Chemistry, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway.
Abstract:
We extend the theory of channel interference to higher-order multiphoton absorption processes. We derive an explicit expression for channel interference in a three-photon absorption process and propose a general scheme for deriving such expressions for multiphoton absorption processes of any order. Based on this general scheme, we derive and analyze the simplest few-state models for multiphoton absorption in centrosymmetric molecules and discuss the criteria for maximizing the corresponding multiphoton absorption strengths.
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