Theory Of Intracavity Near-resonant Two-photon Absorption

Lehmann, Kevin

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https://hdl.handle.net/2142/111035 Copy

Description

Title

Theory Of Intracavity Near-resonant Two-photon Absorption

Author(s)

Lehmann, Kevin

Issue Date

2021-06-22

Keyword(s)

Comparing theory and experiment

Abstract

I recently published a paper$^1$ that analyzed near-resonant two-photon absorption (TPA) spectra of polyatomic molecules excited in the vibrational fundamentals. For each molecule, a very small number of TPA lines are greatly enhanced due to near resonance. It is well known that TPA in a standing wave is dominated by a Doppler Free absorption. In this talk, the theory will be summarised and extensions to the published paper will be presented, including: (1) Theory of high finesse optical cavities with TPA loss, including the peak transmission and spectral shape of cavity modes (which are not Lorenztian with TPA).$^2$ (2) Extension of the theory of saturation that includes the consequences of slow vibrational relaxation, which invalidates the traditional optical Bloch equations. (3) Theory of the TPA lineshape in the limit of low pressure such that the transition width is limited by the finite time of flight of the absorbers through the TEM$_{00}$ mode of the cavity.$^3$ 1. K.K. Lehmann, J. Chem. Phys. {\bf 151}, 144201 (2019) 2. K.K. Lehmann, J. Opt. Soc. Am. A {\bf 37}, 3055 (2020). 3. K.K. Lehmann, to be published in J. Chem. Phys.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111035

DOI

10.15278/isms.2021.TE08

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