Zobrazeno 1 - 10
of 194
pro vyhledávání: '"Litvinyuk I"'
Autor:
Chetty, D., Glover, R. D., Tong, X. M., deHarak, B. A., Xu, H., Haram, N., Bartschat, K., Palmer, A. J., Luiten, A. N., Light, P. S., Litvinyuk, I. V., Sang, R. T.
We present a joint experimental-theoretical study on the effect of the carrier-envelope phase (CEP) of a few-cycle pulse on the atomic excitation process. We focus on the excitation rates of argon as a function of CEP in the intensity range from 50-3
Externí odkaz:
http://arxiv.org/abs/2108.06841
We describe the measurements to control the morphology and hence the characteristics of a picosecond laser produced chromium plasma plume upon double-pulse (DP) irradiation compared to its single-pulse (SP) counterpart. DP schemes are realized by emp
Externí odkaz:
http://arxiv.org/abs/1808.08678
Time-resolved optical emission spectroscopic measurements of a plasma generated by irradiating a Cr target using 60 picosecond (ps) and 300 ps laser pulses is carried out to investigate the variation in the linewidth ($\delta\lambda$) of emission fro
Externí odkaz:
http://arxiv.org/abs/1802.07436
We generated and characterized plasma with single and double picosecond laser pulses in order to study the plume dynamics and to control the plasma properties. The double-pulse scheme was found to be superior for the generation of a homogeneous plasm
Externí odkaz:
http://arxiv.org/abs/1711.00633
Autor:
Sainadh, U. Satya, Xu, Han, Wang, Xiaoshan, Atia-Tul-Noor, Wallace, William C., Douguet, Nicolas, Bray, Alexander W., Ivanov, Igor, Bartschat, Klaus, Kheifets, Anatoli, Sang, R. T., Litvinyuk, I. V.
Tunnelling, one of the key features of quantum mechanics, ignited an ongoing debate about the value, meaning and interpretation of 'tunnelling time'. Until recently the debate was purely theoretical, with the process considered to be instantaneous fo
Externí odkaz:
http://arxiv.org/abs/1707.05445
Autor:
Wallace, W. C., Ghafur, O., Khurmi, C., U., Satya Sainadh, Calvert, J. E., Laban, D. E., Pullen, M. G., Bartschat, K., Grum-Grzhimailo, A. N., Wells, D., Quiney, H. M., Tong, X. M., Litvinyuk, I. V., Sang, R. T., Kielpinski, D.
Publikováno v:
Phys. Rev. Lett. 117, 053001 (2016)
Ionization of atoms and molecules in strong laser fields is a fundamental process in many fields of research, especially in the emerging field of attosecond science. So far, demonstrably accurate data have only been acquired for atomic hydrogen (H),
Externí odkaz:
http://arxiv.org/abs/1601.04379
Autor:
Calvert, J. E., Xu, Han, Palmer, A. J., Glover, R. D., Laban, D. E., Tong, X. M., Dolmatov, V. K., Kheifets, A. S., Bartschat, K., Litvinyuk, I. V., Kielpinski, D., Sang, R. T.
This work describes the first observations of the ionisation of neon in a metastable atomic state utilising a strong-field, few-cycle light pulse. We compare the observations to theoretical predictions based on the Ammosov-Delone-Krainov (ADK) theory
Externí odkaz:
http://arxiv.org/abs/1601.03786
Autor:
Khurmi, Champak, Wallace, W. C., U, Satya Sainadh, Ivanov, I. A., Kheifets, A. S., Tong, X. M., Litvinyuk, I. V., Sang, R. T., Kielpinski, D.
Publikováno v:
Phys. Rev. A 96, 013404 (2017)
We present accurate measurements of carrier-envelope phase effects on ionisation of the noble gases with few-cycle laser pulses. The experimental apparatus is calibrated by using atomic hydrogen data to remove any systematic offsets and thereby obtai
Externí odkaz:
http://arxiv.org/abs/1601.02277
Autor:
Wang, X., Xu, H., Atia-Tul-Noor, A., Hu, B. T., Kielpinski, D., Sang, R. T., Litvinyuk, I. V.
Publikováno v:
Phys. Rev. Lett. 117, 083003 (2016)
It has been recently predicted theoretically that due to nuclear motion light and heavy hydrogen molecules exposed to strong electric field should exhibit substantially different tunneling ionization rates (O.I. Tolstikhin, H.J. Worner and T. Morishi
Externí odkaz:
http://arxiv.org/abs/1506.06449
When a diatomic molecule is ionized by an intense laser field, the ionization rate depends very strongly on the inter-nuclear separation. That dependence exhibits a pronounced maximum at the inter-nuclear separation known as the critical distance. Th
Externí odkaz:
http://arxiv.org/abs/1504.04676