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Title: Phase-only laser control in the weak-field limit: Two-pulse control of IBr photofragmentation revisited

We demonstrate theoretically that laser-induced coherent quantum interference control of asymptotic states of dissociating molecules is possible, starting from a single vibrational eigenstate, after the interaction with two laser pulses—at a fixed time delay—both operating in the weak-field limit. Thus, phase dependence in the interaction with the second fixed-energy phase-modulated pulse persists after the pulse is over. This is illustrated for the nonadiabatic process: I + Br{sup *}←IBr → I + Br, where the relative yield of excited Br{sup *} can be changed by pure phase modulation. Furthermore, a strong frequency dependence of the branching ratio is observed and related to the re-crossing dynamics of the avoided crossing in the above-mentioned process.
Authors:
 [1] ;  [2]
  1. Indian Institute of Science Education and Research Kolkata, Mohanpur 741 246 (India)
  2. Department of Chemistry, Technical University of Denmark, Building 207, DK-2800 Kongens Lyngby (Denmark)
Publication Date:
OSTI Identifier:
22493617
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 144; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BROMINE; DISSOCIATION; FREQUENCY DEPENDENCE; INTERFERENCE; IODINE; IODINE BROMIDES; LASER RADIATION; MOLECULES; PULSED IRRADIATION; TIME DELAY; YIELDS