Abstract

The dephasing of molecular alignment can lead to the deformation of the alignment signal during its periodic revivals. Most studies are concentrated on the first few rotational revival periods of the molecular alignment and neglect the dephasing effect. However, study of the alignment dephasing is still of great significance for both the long-term dynamics of the molecular alignment and the dephasing itself. In this work, we theoretically demonstrate that the dephasing effect is correlated with both the rotational temperature and the rotational revival period of the molecules. The results present that the dephasing is especially significant for those molecules with long rotational revival period at high rotational temperatures. The physics behind it is explored by taking advantage of the coherence of the rotational quantum state population. This work deepens our understanding of rotational dynamics and rotational spectroscopy in molecular alignment.

© 2022 Chinese Laser Press

Rotational echo spectroscopy for accurate measurement of molecular alignment

Pu Wang, Lixin He, Yanqing He, Jianchang Hu, Siqi Sun, Pengfei Lan, and Peixiang Lu
Opt. Lett. 47(5) 1033-1036 (2022)

Beam deflection measurement of bound-electronic and rotational nonlinear refraction in molecular gases

Matthew Reichert, Peng Zhao, Jennifer M. Reed, Trenton R. Ensley, David J. Hagan, and Eric W. Van Stryland
Opt. Express 23(17) 22224-22237 (2015)

Rotated echoes of molecular alignment: fractional, high order and imaginary

Kang Lin, Junyang Ma, Xiaochun Gong, Qiying Song, Qinying Ji, Wenbin Zhang, Hanxiao Li, Peifen Lu, Hui Li, Heping Zeng, Jian Wu, Jean-Michel Hartmann, Olivier Faucher, Erez Gershnabel, Yehiam Prior, and Ilya Sh. Averbukh
Opt. Express 25(21) 24917-24926 (2017)

Measuring the rotational temperature and pump intensity in molecular alignment experiments via high harmonic generation

Yanqing He, Lixin He, Pu Wang, Bincheng Wang, Siqi Sun, Ruxuan Liu, Baoning Wang, Pengfei Lan, and Peixiang Lu
Opt. Express 28(14) 21182-21191 (2020)

Probing nonadiabatic molecular alignment by spectral modulation

N. Kaya, G. Kaya, M. Sayrac, Y. Boran, S. Anumula, J. Strohaber, A. A. Kolomenskii, and H. A. Schuessler
Opt. Express 24(3) 2562-2576 (2016)