<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mtext>HD</mml:mtext></mml:mrow><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:math>in a beam in intense pulsed laser fields: Dissociation and ionization with high-energy resolution of the fragments

Kiess, Andreas; Pavičić, Domagoj; Hänsch, Theodor W.; Figger, H.

doi:10.1103/physreva.77.053401

Cited by 17 publications

(30 citation statements)

References 39 publications

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“…For the homonuclear H + 2 and D + 2 molecules, coupling only occurs between curves differing in odd numbers of dressed photons due to parity considerations. However, for heteronuclear HD + , coupling via absorption of an even number of photons is also possible (Kiess et al 2008).…”

Section: Resultsmentioning

confidence: 99%

“…From the initial electron impact ionization in an ion source, a wide range of vibrational levels are populated in a Franck-Condon distribution. While this ion beam approach provides an H + 2 (or HD + /D + 2 ) target with a well-characterized vibrational distribution, the resulting dissociation signals contain contributions from many vibrational levels which cannot be easily identified (Kiess et al 2008, McKenna et al 2007, Wang et al 2006, Pavičić et al 2005, Williams et al 2000.…”

Section: Introductionmentioning

confidence: 99%

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Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Alexander

Calvert

King

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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An electrostatic trapping scheme for use in the study of light-induced dissociation of molecular ions is outlined. We present a detailed description of the electrostatic reflection storage device and specifically demonstrate its use in the preparation of a vibrationally cold ensemble of deuterium hydride (HD + ) ions. By interacting an intense femtosecond laser with this target and detecting neutral fragmentation products, we are able to elucidate previously inaccessible dissociation dynamics for fundamental diatomics in intense laser fields. In this context, we present new results of intense field dissociation of HD + which are interpreted in terms of recent theoretical calculations.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Alexander

Calvert

King

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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“…The mechanisms have been described in detail in recent review articles [7][8][9] and studies of the fragmentation dynamics and energetics continue to yield interesting developments for both gas phase neutral targets (e.g. [28][29][30][31] and ion beam targets [32][33][34][35][36][37][38][39]. Internuclear separation, R(au)…”

Section: Intense-field Femtosecond Fragmentation and Ionisation Of Dmentioning

confidence: 99%

“…[28][29][30][31]) and ion beams (e.g. [34][35][36][37][38][39]). Beyond this, other exciting advances are now being made in short pulse studies of imaging/controlling molecular dynamics.…”

Section: Future Outlookmentioning

confidence: 99%

Time-resolved studies of ultrafast wavepacket dynamics in hydrogen molecules

et al. 2010

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a b s t r a c tRecent advances in the study of quantum vibrations and rotations in the fundamental hydrogen molecules are reported. Using the deuterium molecules (D + 2 and D 2 ) as exemplars, the application of ultrafast femtosecond pump-probe experiments to study the creation and time-resolved imaging of coherent nuclear wavepackets is discussed. The ability to study the motion of these fundamental molecules in the time-domain is a notable milestone, made possible through the advent of ultrashort intense laser pulses with durations on sub-vibrational (and sub-rotational) timescales. Quantum wavepacket revivals are characterised for both vibrational and rotational degrees of freedom and quantum models are used to provide a detailed discussion of the underlying ultrafast physical dynamics for the specialist and non-specialist alike.

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“…Although HD + is an isotope of H + 2 which has been extensively studied, 9,10,13 it differs from its homonuclear brethren in several aspects and has been investigated experimentally and theoretically by several groups. 1,[14][15][16][17][18][19][20] With long laser pulses, Sheehy et al reported that the fragment distribution in the photodissociation of HD + can be changed by varying the relative phase between the fundamental and the second harmonic of an optical field. 15 Roudnev et al studied the effect of the carrier-envelope phase difference on the dissociation of HD + in intense laser fields.…”

Section: Introductionmentioning

confidence: 98%

THEORETICAL STUDY OF ABOVE THRESHOLD DISSOCIATION OF HD⁺ IN FEMTOSECOND LASER FIELDS

Yuan

Liu

et al. 2009

J. Theor. Comput. Chem.

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The above threshold dissociation (ATD) of the HD + molecular ion in a linearly polarized femtosecond laser field is theoretically studied using three-dimensional time-dependent quantum wave packet method. Based on the Born-Oppenheimer approximation (BOA), calculations are performed on two electronic states, the ground state 1sσ and the excited state 2pσ. The energy-dependent distributions of the dissociated fragments, resulting from the ATD, are calculated by using an asymptotic-flow expression in the momentum space. The numerical results demonstrate that, in the laser field of wavelength λ = 800 nm and full-width at half-maximum (FWHM) τ = 30 fs, only two-photon dissociation is observable at a weaker pulse peak intensity, 5.0 × 10 12 W cm −2 , while at an intense intensity, 1.5 × 10 15 W cm −2 , the dissociated fragments resulting from four-photon absorption dominates over the photodissociation process. These results are consistent with the experimental observation of Orr et al. [Orr PA et al., Phys Rev Lett 98:163001, 2007]. The ac Stark-shift caused by intense laser field will change the kinetic energies of the fragments. The ATD phenomena are quantitatively interpreted in terms of the concept of light-induced potential. The molecular rotation and alignment have some effects on the kinetic energy spectrum of the dissociated fragments. The molecular rotation reduces the ac Stark-shift and broadens the peaks of kinetic energy spectra of the dissociated fragments. However, the intense laser field can effectively align the molecule and is helpful to increase the ATD probability. The ATD spectrum is related to the initial quantum numbers J 0 and M 0 of the molecule. The ATD spectrum of HD + is calculated at a limited thermal temperature.

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HD+in a beam in intense pulsed laser fields: Dissociation and ionization with high-energy resolution of the fragments

Cited by 17 publications

References 39 publications

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Time-resolved studies of ultrafast wavepacket dynamics in hydrogen molecules

THEORETICAL STUDY OF ABOVE THRESHOLD DISSOCIATION OF HD⁺ IN FEMTOSECOND LASER FIELDS

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HD+in a beam in intense pulsed laser fields: Dissociation and ionization with high-energy resolution of the fragments

Cited by 17 publications

References 39 publications

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Short pulse laser-induced dissociation of vibrationally cold, trapped molecular ions

Time-resolved studies of ultrafast wavepacket dynamics in hydrogen molecules

THEORETICAL STUDY OF ABOVE THRESHOLD DISSOCIATION OF HD+ IN FEMTOSECOND LASER FIELDS

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Product

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THEORETICAL STUDY OF ABOVE THRESHOLD DISSOCIATION OF HD⁺ IN FEMTOSECOND LASER FIELDS