Abstract
We describe the current status of coherent radiative control, a quantum-interference based approach to controlling molecular processes by the use of coherent radiation. In addition to providing an overview of proposed laboratory scenarios, ongoing experimental studies and recent theoretical developments, we call attention to recent theoretical results on symmetry breaking in achiral systems.
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References
P. Brumer and M. Shapiro, “Control of Unimolecular Reactions Using Coherent Light”, Chem. Phys. Lett. 126:541 (1986).
P. Brumer and M. Shapiro, “Coherent Radiative Control of Unimolecular Reactions: Three Dimensional Results”, Faraday Disc. Chem. Soc. 82:177 (1987).
M. Shapiro and P. Brumer, “Laser Control of Product Quantum State Populations in Unimolecular Reactions”, J. Chem. Phys. 84:4103 (1986).
C. Asaro, P. Brumer and M. Shapiro, “Polarization Control of Branching Ratios in Photodissociation”, Phys. Rev. Lett. 60:1634 (1988).
M. Shapiro, J.W. Hepburn and P. Brumer, “Simplified Laser Control of Unimolecular Reactions: Simultaneous (ω1ω3) Excitation”, Chem. Phys. Lett. 149:451 (1988).
G. Kurizki, M. Shapiro and P. Brumer, “Phase Coherent Control of Photocurrent Directionality in Semiconductors”, Phys. Rev. B39:3435 (1989).
M. Shapiro and P. Brumer, “Laser Control of Unimolecular Decay Yields in the Presence of Collisions”, J. Chem. Phys. 90:6179 (1989).
T. Seideman, M. Shapiro and P.Brumer, “Coherent Radiative Control of Unimolecular Reactions: Selective Bond Breaking with Picosecond Pulses”, J. Chem. Phys. 90:7132 (1989).
For an introductory discussion see P. Brumer and M. Shapiro, “Coherence Chemistry: Controlling Chemical Reactions With Lasers”, Accounts Chem. Res. 22:407 (1989).
P. Brumer and M. Shapiro, “One Photon Mode Selective Control of Reactions by Rapid or Shaped Laser Pulses: An Emperor Without Clothes?”, Chem. Phys. 139:221 (1989).
I. Levy, M. Shapiro and P. Brumer, “Two-Pulse Coherent Control of Electronic States in the Photodissociation of IBr: Theory and Proposed Experiment”, J. Chem. Phys. 93:2493 (1990).
M. Shapiro and P. Brumer (to be published).
C.K. Chan, P. Brumer and M. Shapiro, “Coherent Radiative Control of IBr Photodissociation via Simultaneous (ω1, ω3) Excitation”, J. Chem. Phys. 94: 2688 (1991).
J. Krause, M. Shapiro and P. Brumer, “Coherent Control of Bimolecular Reactions”, J. Chem. Phys. 92:1126 (1990).
M. Shapiro and P. Brumer (to be published).
P. Brumer, X-P. Jiang and M. Shapiro (to be published).
See, e.g., S.H. Tersegni, P. Gaspard and S.A. Rice, “ On Using Shaped Laser Pulses to Control the Selectivity of Product Formation in a Chemical Reaction”, J. Chem. Phys. 93:1670 (1990) and references therein.
See, e.g., S. Shi and H. Rabitz, “Optimal Control of Selective Vibrational Excitation of Harmonic Molecules: Analytic Solution and Restricted Forms for the Optimal Field”, J. Chem. Phys. 92:2927 (1990) and references therein.
S.M. Park, S-P. Lu and R.J. Gordon, “Coherent Laser Control of the Resonant Enhanced Multiphoton Ionization of HC1”, J. Chem. Phys. (in press).
C. Chen, Y-Y. Yin and D.S. Elliott, “Interference Betweeen Optical Transitions”, Phys. Rev. Lett. 64:507 (1990).
As another interesting case consider the use of two components of laser polarization to excite a bound state |E i 〉 to the continuum[4]. These two components will interfere constructively and destructively and allow control over product ratios in the differential cross section. However, the interference contribution to the total cross section vanishes since these two routes reach different values of M J .
X-P. Jiang, P. Brumer, and M. Shapiro (to be published).
An example, although requiring a slight extension of the BAB’ notation, is the Norrish type II reaction: D(CH2)3CO(CH2)3D’ dissociating to DCHCH2 + D’(CH2)3COCH3 and D’CHCH2 + D(CH2)3COCH3 where D and D’ are enantiomers.
M. Shapiro and P. Brumer, “Controlled Photon Induced Symmetry Breaking: Chiral Molecular Products from Achiral Precursors”, J. Chem. Phys. (in press).
J.M. Hollas, “High Resolution Spectroscopy”, (Butterworths, London, 1982).
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© 1992 Springer Science+Business Media New York
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Brumer, P., Shapiro, M. (1992). Coherence in the Control of Molecular Processes. In: Bandrauk, A.D., Wallace, S.C. (eds) Coherence Phenomena in Atoms and Molecules in Laser Fields. NATO ASI Series, vol 287. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3364-1_27
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DOI: https://doi.org/10.1007/978-1-4615-3364-1_27
Publisher Name: Springer, Boston, MA
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