On the observation of field-free orientation of a symmetric top molecule by terahertz laser pulses at high temperature

TL;DR

This paper demonstrates the experimental and numerical observation of field-free orientation of methyl-iodide molecules at high temperature using terahertz laser pulses, with results matching simulations.

Contribution

It introduces a method to achieve and measure field-free molecular orientation at high temperatures using terahertz pulses and plasma generation.

Findings

Successful experimental observation of field-free orientation.

Numerical simulations accurately reproduce experimental results.

Effective use of terahertz pulses for molecular control.

Abstract

We investigate experimentally and numerically the field-free orientation of the symmetric top molecule of methyl-iodide at high temperature using a terahertz radiation generated by a plasma induced by a two-color laser beam. The degree of orientation is measured from the free-induction decay emitted by the sample. The observed experimental signal is reproduced with a good accuracy by numerical simulations.