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One‐ and Two‐Photon Absorption: Physical Principle and Applications
Author(s) -
Kang Dawei,
Zhu Siyuan,
Liu Dian,
Cao Shuo,
Sun Mengtao
Publication year - 2020
Publication title -
the chemical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.61
H-Index - 78
eISSN - 1528-0691
pISSN - 1527-8999
DOI - 10.1002/tcr.202000038
Subject(s) - electric field , absorption (acoustics) , excited state , charge (physics) , photon , two photon absorption , field (mathematics) , atomic physics , physics , quantum mechanics , optics , mathematics , laser , pure mathematics
We introduce the principle and applications of one‐photon absorption (OPA) and two‐photon absorption (TPA) controlled by external electric fields. The physical mechanism of OPA and TPA are firstly introduced, which can visually promote thoroughly understanding of principle and physical analysis. Secondly, the applications of different molecules in OPA and TPA with and without external electric field are introduced in detail. The effect of the external electric field on the charge transfer during the absorption process is also exemplified. Furthermore, the external electric field on the molecular orbital wave function is visualized through the charge transfer process in the excited state transitions. The purpose of this review is to deepen the understanding of the types of charge transfer under linear and non‐linear absorption in different systems.