Pulse shape effect of delayed pulse on non-adiabatic rotational excitation

Arya, Urvashi; Dahiya, Brijender; Prasad, Vinod

doi:10.1016/j.saa.2012.04.031

Cited by 12 publications

(4 citation statements)

References 43 publications

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“…continuous static field, second HCP with different pulse duraton and a strong field generated by the delayed zero area pulse/ultra-short HCP is [88]:…”

Section: Orientation By Static Electric Field In Combination With Del...mentioning

confidence: 99%

“…Also θ ′ represents zenith angle between molecular axis and zero area pulse/ultra-short HCP. Time evolution of transition probabilities for different states depend on static field strength and also on form of delayed pulse applied figure(3) in reference [88]. Initial pulse is applied with the pulse width of 1.0ps, however delayed pulse is applied at delay time t c /2, where t c denotes the rotational period of the molecule.…”

Section: Orientation By Static Electric Field In Combination With Del...mentioning

confidence: 99%

“…Single pulse approach to stusdy nonadiabatic alignment is practiced by many []. However when we apply laser pulses in different combinations NAREX changes appreciably and gives reasonable field free orientation [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99]133,218,332,335].…”

Section: Orientation By Ramped Pulsesmentioning

confidence: 99%

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Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser Pulses

Nautiyal,

Devi,

Tyagi

et al. 2020

Preprint

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We review on the theoretical status of intense laser orientation and alignment-a field at the interface between intense laser physics and chemical dynamics with the potential applications ranging from high harmonic generation, nano-scale processing and control of chemical reactions. The evolution of the rotational wave packet and its dynamics leading to orientation and alignment is the topic of the present discussion. The major part of the article basically presents an overview on recent theoretical progress in controlling the orientation and alignment dynamics of a molecule by means of shaped laser pulses. The various theoretical approaches that lead to orientation and alignment ranging from static electrostatic field in combination with laser field(s), combination of orienting and aligning field, combination of aligning fields, combination of orienting fields, application of train of pulses etc. are discussed. It is focussed that the train of pulses proves to be quite efficient in increasing the orientation or alignment of a molecule without causing the molecule to ionize. The orientation and alignment both can occur in adiabatic and non-adiabatic conditions with the rotational

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“…continuous static field, second HCP with different pulse duraton and a strong field generated by the delayed zero area pulse/ultra-short HCP is [88]:…”

Section: Orientation By Static Electric Field In Combination With Del...mentioning

confidence: 99%

Section: Orientation By Static Electric Field In Combination With Del...mentioning

confidence: 99%

See 1 more Smart Citation

Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser Pulses

Nautiyal,

Devi,

Tyagi

et al. 2020

Preprint

Self Cite

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“…When the interaction is shorter than the duration of its rotational period, then non-adiabatic rotational excitation (NAREX) occurs. [12][13][14][15][16][17][18] According to rough estimate for NAREX, pulse duration is (T pulse < h/B), where h is Planck's constant and B is rotational constant of the molecule. The time evolution is said to be non-adiabatic and molecule is supposed to end up in a rotational wave packet.…”

Section: Introductionmentioning

confidence: 99%

Non-adiabatic rotational excitation of dipolar molecule under the influence of delayed pulses

2013

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We suggest a control scheme for choosing populations of molecular rotational states by wave packet interference. The rotational wave packets of LiCl molecule excited non-adiabatically by half cycle pulse (HCP) is controlled using the second ultrashort HCP. By adjusting the time delay between the two laser pulses, constructive or destructive interference among these wave packets enables the population to be enhanced or repressed for the specific rotational state. The role played by the field strength and the pulse duration is also calculated numerically. We have used fourth order Runge-Kutta method to study non-adiabatic rotational excitation (NAREX) dynamics.Keywords. NAREX; delay time; wave packet interference.inserting the equations (8) and (9) into equation (7), one obtains a set of coupled equations for the timedependent expansion coefficients,The selection rules J = J ± 1 and M = M simplify the differential equation (10) asandThe time-dependent rotational wave packet (8) is thusThe matrix elements J M i | cos (θ) |J M i for J = J ±

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Photoionization of confined hydrogen atom by short laser pulses

Lumb

Prasad

2014

Indian J Phys

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Pulse shape effect of delayed pulse on non-adiabatic rotational excitation

Cited by 12 publications

References 43 publications

Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser Pulses

Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser Pulses

Non-adiabatic rotational excitation of dipolar molecule under the influence of delayed pulses

Photoionization of confined hydrogen atom by short laser pulses

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