Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Newell, W. R."'
Publikováno v:
Faraday Discussions v153 p343-360 (2011)
The use of strong-field (i.e. intensities in excess of 10^13 Wcm-2) few-cycle ultrafast (durations of 10 femtoseconds or less) laser pulses to create, manipulate and image vibrational wavepackets is investigated. Quasi-classical modelling of the init
Externí odkaz:
http://arxiv.org/abs/1208.1882
Autor:
Bryan, W. A., Stebbings, S. L., McKenna, J., English, E. M. L., Suresh, M., Wood, J., Srigengan, B, Turcu, I. C. E., Smith, J. M., Divall, E. J., Hooker, C. J., Langley, A. J., Collier, J. L., Williams, I. D., Newell, W. R.
Publikováno v:
W A Bryan et al, Nature Physics 2 p379-383 (2006)
Modern intense ultrafast pulsed lasers generate an electric field of sufficient strength to permit tunnel ionization of the valence electrons in atoms. This process is usually treated as a rapid succession of isolated events, in which the states of t
Externí odkaz:
http://arxiv.org/abs/1003.0821
Autor:
Bryan, W A, Calvert, C R, King, R B, Nemeth, G R A J, Greenwood, J B, Williams, I D, Newell, W R
Publikováno v:
W A Bryan et al 2010 New J. Phys. 12 073019
A quasi-classical model (QCM) of molecular dynamics in intense femtosecond laser fields has been developed, and applied to a study of the effect of an ultrashort `control' pulse on the vibrational motion of a deuterium molecular ion in its ground ele
Externí odkaz:
http://arxiv.org/abs/1001.1138
Autor:
Bryan, W. A., McKenna, J., English, E. M. L., Wood, J., Calvert, C. R., Torres, R., Murphy, D. S., Turcu, I. C. E., Collier, J. L., McCann, J. F., Williams, I. D., Newell, W. R.
Publikováno v:
Phys. Rev. A 76, 053402 (2007)
Tunnel ionization of room-temperature D$_2$ in an ultrashort (12 femtosecond) near infra-red (800 nm) pump laser pulse excites a vibrational wavepacket in the D2+ ions; a rotational wavepacket is also excited in residual D2 molecules. Both wavepacket
Externí odkaz:
http://arxiv.org/abs/0711.0953
Autor:
Bryan, W. A., English, E. M. L., McKenna, J., Wood, J., Calvert, C. R., Torres, R., Turcu, I. C. E., Collier, J. L., Williams, I. D., Newell, W. R.
Publikováno v:
Phys. Rev. A 76, 023414 (2007)
A coherent superposition of rotational states in D$_2$ has been excited by nonresonant ultrafast (12 femtosecond) intense (2 $\times$ 10$^{14}$ Wcm$^{-2}$) 800 nm laser pulses leading to impulsive dynamic alignment. Field-free evolution of this rotat
Externí odkaz:
http://arxiv.org/abs/0706.4077
Publikováno v:
Phys. Rev. A, vol 74, art 053409 (2006)
The two- and three-body Coulomb explosion of carbonyl sulfide (OCS) by 790 nm, 50 fs laser pulses focussed to $\approx $ 10$^{16}$ Wcm$^{-2}$ has been investigated by three-dimensional covariance mapping technique. For the first time in a triatomic m
Externí odkaz:
http://arxiv.org/abs/physics/0610058
Autor:
Bryan, W A, Stebbings, S L, McKenna, J, English, E M L, Suresh, M, Wood, J, Srigengan, B, Turcu, I C E, Williams, I D, Newell, W R
Publikováno v:
J. Phys. B/ vol 39 pS349 (2006)
The probability of multiple ionization of krypton by 50 femtosecond circularly polarized laser pulses, independent of the optical focal geometry, has been obtained for the first time. The excellent agreement over the intensity range 10 TWcm-2 to 10 P
Externí odkaz:
http://arxiv.org/abs/physics/0512152
Publikováno v:
J. Phys. B: At. Mol. Opt. Phys. vol.38 p.3083 (2005)
Application of a parallel-projection inversion technique to z-scan spectra of multiply charged xenon and krypton ions, obtained by non-resonant field ionization of neutral targets, has for the first time permitted the direct observation of intensity-
Externí odkaz:
http://arxiv.org/abs/physics/0509204
Autor:
Bryan, W. A., Stebbings, S. L., English, E. M. L., Goodworth, T. R. J., Newell, W. R., McKenna, J., Suresh, M., Srigengan, B., Williams, I. D., Turcu, I. C. E., Smith, J. M., Divall, E. J., Hooker, C. J., Langley, A. J.
Publikováno v:
Phys. Rev. A, vol 73, art 013407 (2006)
We report a novel experimental technique for the comparison of ionization processes in ultrafast laser pulses irrespective of pulse ellipticity. Multiple ionization of xenon by 50 fs 790 nm, linearly and circularly polarized laser pulses is observed
Externí odkaz:
http://arxiv.org/abs/physics/0509121
Autor:
Williams, I. D., Newell, W. R.
Publikováno v:
Philosophical Transactions: Mathematical, Physical and Engineering Sciences, 1999 May . 357(1755), 1297-1308.
Externí odkaz:
https://www.jstor.org/stable/55160