https://doi.org/10.1140/epjd/e2016-60598-6
Regular Article
Enhancement and suppression of field-free molecular orientation with two ultrashort pulses
Department of Applied Physics, National University of
Kaohsiung, 811
Kaohsiung,
Taiwan
a e-mail: yyliao@nuk.edu.tw
Received:
22
October
2015
Received in final form:
16
March
2016
Published online:
21
June
2016
The field-free molecular orientation induced by two half-cycle pulses is investigated systematically. In addition to the structure parameters of the pulses, the polarization direction and the delay time are modulated to influence the rotational dynamics. The degree of orientation is effectively enhanced by tailoring the parameters of the pulses. The enhancement occurs cyclically, depending on the delay time. In particular, the degree of orientation can be greatly suppressed for various initial states when the pulses are polarized in opposite directions. The pronounced effect becomes weak in the case of the two differently shaped pulses. The feature of orientation can also be modulated by altering the field strength of one pulse. Furthermore, the effect of temperature on the orientation is analyzed.
Key words: Molecular Physics and Chemical Physics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2016
