28 citations · 191 across the 15 of their papers we have counts for
15 papers
Nonclassical Cutoff Fluctuations in Squeezed-Light-Driven High-Harmonic Generation
Tsendsuren Khurelbaatar, R. T. Sang, Igor Litvinyuk
Strong-field high-harmonic generation (HHG) is conventionally described semiclassically, with the driving laser treated as a classical field. This approximation becomes insufficien…
Attosecond delays of high harmonic emissions from isotopes of molecular hydrogen measured by Gouy phase XUV interferometer
Mumta Hena Mustary, Liang Xu, Wanyang Wu +6
High harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in amplitude and phase of high harmonic generation (HHG) signals4. However,…
Carrier-Envelope-Phase Dependent Strong-Field Excitation
D. Chetty, R. D. Glover, X. M. Tong +9
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 excitatio…
Strong field ionisation of Argon: Electron momentum spectra and nondipole effects
Nida Haram, Han Xu, Igor Ivanov +3
We investigate the influence of relativistic nondipole effects on the photoelectron spectra of argon, particularly in the low kinetic energy region (0 eV - 5 eV). In our experiment…
Observation of Dynamic Stark Resonances in Strong-Field Excitation
Dashavir Chetty, Rohan D. Glover, Bruno A. deHarak +12
We investigate AC Stark-shifted resonances in argon with ultrashort near-infrared pulses. Using 30 fs pulses we observe periodic enhancements of the excitation yield in the intensi…
Plasma plumes produced by laser ablation of Al with single and double pulse schemes
N Smijesh, Kavya H. Rao, D. Chetty +2
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 sch…
Attosecond angular streaking and tunnelling time in atomic hydrogen
U. Satya Sainadh, Han Xu, Xiaoshan Wang +9
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…
Precise and accurate measurements of strong-field photoionisation and a transferrable laser intensity calibration standard
W. C. Wallace, O. Ghafur, C. Khurmi +12
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, demons…
The interaction of excited atoms and few-cycle laser pulses
J. E. Calvert, Han Xu, A. J. Palmer +9
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 th…
Measuring laser carrier-envelope phase effects in the noble gases with an atomic hydrogen calibration standard
Champak Khurmi, W. C. Wallace, Satya Sainadh U +6
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 a…
Isotope effect in tunnelling ionization of neutral hydrogen molecules
X. Wang, H. Xu, A. Atia-Tul-Noor +4
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 t…
Transverse electron momentum distribution in tunneling and over the barrier ionization by laser pulses with varying ellipticity
I. A. Ivanov, A. S. Kheifets, J. E. Calvert +7
We study transverse electron momentum distribution (TEMD) in strong field atomic ionization driven by laser pulses with varying ellipticity. We show, both experimentally and theore…
Benchmarking strong-field ionisation with atomic hydrogen
D. Kielpinski, R. T. Sang, I. V. Litvinyuk
As the simplest atomic system, the hydrogen atom plays a key benchmarking role in laser and quantum physics. Atomic hydrogen is a widely used atomic test system for theoretical cal…
Carrier-Envelope-Phase Dependent Dissociation of Hydrogen
Han Xu, J - P Maclean, D E Laban +4
We studied dependence of dissociative ionization in H2 on carrier-envelope phase (CEP) of few-cycle (6fs) near-infrared (NIR) laser pulses. For low-energy channels, we present the…
Experimental ionization of atomic hydrogen with few-cycle pulses
M. G. Pullen, W. C. Wallace, D. E. Laban +12
We present the first experimental data on strong-field ionization of atomic hydrogen by few-cycle laser pulses. We obtain quantitative agreement at the 10% level between the data a…