49 citations · 167 across the 10 of their papers we have counts for
10 papers
Laser-Induced Graphitisation of Diamond Under 30 fs Laser Pulse Irradiation
Bakhtiar Ali, Han Xu, Dashavir Chetty +3
The degree of laser-induced graphitisation from a sp3-bonded to a sp2-bonded carbon fraction in a single crystal chemical vapour deposited (CVD) diamond under a varying fluence of…
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,…
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…
Relativistic non-dipole effects in strong-field atomic ionization at moderate intensities
Nida Haram, Igor Ivanov, Han Xu +7
We present a detailed experimental and theoretical study on the relativistic non-dipole effects in strong-field atomic ionisation by near-infrared linearly-polarised few-cycle lase…
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…
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…
Experimental observation of the elusive double-peak structure in R-dependent strong-field ionization rate of H2+
Han Xu, Feng He, D. Kielpinski +2
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 maxi…
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…
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…