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Title: Parity-selective enhancement of field-free molecular orientation in an intense two-color laser field

Abstract

We investigated the characteristics of molecular orientation induced by a nonresonant two-color femtosecond laser field. By analyzing the rotational dynamics of asymmetric linear molecules, we revealed that the critical parameter in characterizing the molecular orientation was the hyperpolarizability of molecules that selected the excitation paths of rotational states between parity-changing and parity-conserving transitions. Especially, in the case of molecules with small hyperpolarizability, a significant enhancement of orientation was achieved at the half-rotational period, instead of the full-rotational period. This deeper understanding of the hyperpolarizability-dependent characteristics of molecular orientation in a two-color scheme can provide an effective method to achieve significantly enhanced field-free orientation for various polar molecules.

Authors:
;  [1]; ; ;  [2]
  1. Department of Physics and Coherent X-ray Research Center, KAIST, Yusong-gu, Daejon 305-701 (Korea, Republic of)
  2. Advanced Photonics Research Institute, GIST, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22095747
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ASYMMETRY; COLOR; EXCITATION; LASER RADIATION; MOLECULES; ORIENTATION; P INVARIANCE; PARITY; POLARIZABILITY; ROTATIONAL STATES

Citation Formats

Yun, Hyeok, Nam, Chang Hee, Kim, Hyung Taek, Kim, Chul Min, and Lee, Jongmin. Parity-selective enhancement of field-free molecular orientation in an intense two-color laser field. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.065401.
Yun, Hyeok, Nam, Chang Hee, Kim, Hyung Taek, Kim, Chul Min, & Lee, Jongmin. Parity-selective enhancement of field-free molecular orientation in an intense two-color laser field. United States. https://doi.org/10.1103/PHYSREVA.84.065401
Yun, Hyeok, Nam, Chang Hee, Kim, Hyung Taek, Kim, Chul Min, and Lee, Jongmin. Thu . "Parity-selective enhancement of field-free molecular orientation in an intense two-color laser field". United States. https://doi.org/10.1103/PHYSREVA.84.065401.
@article{osti_22095747,
title = {Parity-selective enhancement of field-free molecular orientation in an intense two-color laser field},
author = {Yun, Hyeok and Nam, Chang Hee and Kim, Hyung Taek and Kim, Chul Min and Lee, Jongmin},
abstractNote = {We investigated the characteristics of molecular orientation induced by a nonresonant two-color femtosecond laser field. By analyzing the rotational dynamics of asymmetric linear molecules, we revealed that the critical parameter in characterizing the molecular orientation was the hyperpolarizability of molecules that selected the excitation paths of rotational states between parity-changing and parity-conserving transitions. Especially, in the case of molecules with small hyperpolarizability, a significant enhancement of orientation was achieved at the half-rotational period, instead of the full-rotational period. This deeper understanding of the hyperpolarizability-dependent characteristics of molecular orientation in a two-color scheme can provide an effective method to achieve significantly enhanced field-free orientation for various polar molecules.},
doi = {10.1103/PHYSREVA.84.065401},
url = {https://www.osti.gov/biblio/22095747}, journal = {Physical Review. A},
issn = {1050-2947},
number = 6,
volume = 84,
place = {United States},
year = {2011},
month = {12}
}