301 citations · 614 across the 13 of their papers we have counts for
10 papers · 1 filter
Transverse orbital angular momentum: setting the record straight
N. Tripathi, S. W. Hancock, H. M. Milchberg
The nature of the transverse orbital angular momentum (tOAM) associated with spatiotemporal optical vortex (STOV) pulses has been the subject of recent debate. We demonstrate that…
Transverse orbital angular momentum of amplitude-perturbed fields
S. W. Hancock, N. Tripathi, M. S. Le +2
We measure the change in transverse orbital angular momentum (tOAM) per photon, delta L_y, applied to an optical pulse by a pure amplitude perturbation. The results are in excellen…
Spatiotemporal torquing of light
S. W. Hancock, S. Zahedpour, A. Goffin +1
We demonstrate the controlled spatiotemporal transfer of transverse orbital angular momentum (OAM) to electromagnetic waves: the spatiotemporal torquing of light. This is a radical…
Roadmap on structured waves
K. Y. Bliokh, E. Karimi, M. J. Padgett +47
Structured waves are ubiquitous for all areas of wave physics, both classical and quantum, where the wavefields are inhomogeneous and cannot be approximated by a single plane wave.…
Mode structure and orbital angular momentum of spatiotemporal optical vortex (STOV) pulses
S. W. Hancock, S. Zahedpour, H. M. Milchberg
We identify a class of modal solutions for spatio-temporal optical vortex (STOV) electromagnetic pulses propagating in dispersive media with orbital angular momentum (OAM) orthogon…
Second harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum
S. W. Hancock, S. Zahedpour, H. M. Milchberg
Spatiotemporal optical vortices (STOVs) are a new type of intrinsic optical orbital angular momentum (OAM) structure in which the OAM vector is orthogonal to the propagation direct…
Transient-grating single-shot supercontinuum spectral interferometry (TG-SSSI)
S. W. Hancock, S. Zahedpour, H. M. Milchberg
We present a technique for the single-shot measurement of the space- and time-resolved spatiotemporal amplitude and phase of an ultrashort laser pulse. The method, transient-gratin…
Simplified single-shot supercontinuum spectral interferometry
Dhruvit Patel, Dogeun Jang, Scott W. Hancock +2
We have experimentally demonstrated a simplified method for performing single-shot supercontinuum spectral interferometry (SSSI) that does not require pre-characterization of the p…
Free-space propagation of spatio-temporal optical vortices (STOVs)
S. W. Hancock, S. Zahedpour, A. Goffin +1
Spatio-temporal optical vortices (STOVs) are a new type of optical orbital angular momentum (OAM) with optical phase circulation in space-time. In prior work [N. Jhajj et al., Phys…
Ultrashort infrared 2.5-11μm pulses: spatiotemporal profiles and absolute nonlinear response of air constituents
S. Zahedpour, S. W. Hancock, H. M. Milchberg
We measure the detailed spatiotemporal profiles of femtosecond laser pulses in the infrared wavelength range λ=2.5-11μm, and the absolute nonlinear response of major air constituen…