492 citations · 2k across the 26 of their papers we have counts for
26 papers
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.…
Report of Snowmass 21 Accelerator Frontier Topical Group 6 on Advanced Accelerators
C. Geddes, M. Hogan, P. Musumeci +1
The Snowmass 2021 Accelerator Frontier topical group \# 6 on Advanced Accelerator Concepts, covers new R\&D concepts for particle acceleration, generation, and focusing. Based on c…
Atmospheric aerosol clearing by femtosecond filaments
A. Goffin, J. Griff-McMahon, I. Larkin +1
Atmospheric aerosols, such as water droplets in fog, interfere with laser propagation through scattering and absorption. Femtosecond optical filaments have been shown to clear fogg…
Phase front retrieval and correction of Bessel beams
B. Miao, L. Feder, J. E. Shrock +1
Bessel beams generated with non-ideal axicons are affected by aberrations. We introduce a method to retrieve the complex amplitude of a Bessel beam from intensity measurements alon…
Multi-GeV electron bunches from an all-optical laser wakefield accelerator
B. Miao, J. E. Shrock, L. Feder +8
We present the first demonstration of multi-GeV laser wakefield acceleration in a fully optically formed plasma waveguide, with an acceleration gradient as high as 25 GeV/m. The gu…
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…
Laser-accelerated, low divergence 15 MeV quasi-monoenergetic electron bunches at 1 kHz
F. Salehi, M. Le, L. Railing +1
We demonstrate laser wakefield acceleration of quasi-monoenergetic electron bunches up to 15 MeV at 1 kHz repetition rate with 2.5 pC charge per bunch and a core with < 7 mrad beam…
Meter-Scale, Conditioned Hydrodynamic Optical-Field-Ionized Plasma Channels
A. Picksley, A. Alejo, R. J. Shalloo +9
We demonstrate through experiments and numerical simulations that low-density, low-loss, meter-scale plasma channels can be generated by employing a conditioning laser pulse to ion…
Optical guiding in meter-scale plasma waveguides
B. Miao, L. Feder, J. E. Shrock +2
We demonstrate a new highly tunable technique for generating meter-scale low density plasma waveguides. Such guides can enable electron acceleration to tens of GeV in a single stag…
Air hydrodynamics of the ultrafast laser-triggered spark gap
E. W. Rosenthal, I. Larkin, A. Goffin +4
We present space and time resolved measurements of the air hydrodynamics induced by ultrafast laser pulse excitation of the air gap between two electrodes at high potential differe…
Molecular Quantum Wakes for Clearing Fog
Malte C. Schroeder, Ilia Larkin, Thomas Produit +3
High intensity laser filamentation in air has recently demonstrated that, through plasma generation and its associated shockwave, fog can be cleared around the beam, leaving an opt…
Self-guiding of long-wave infrared laser pulses mediated by avalanche ionization
D. Woodbury, A. Goffin, R. M. Schwartz +2
Nonlinear self-guided propagation of intense long-wave infrared (LWIR) laser pulses is of significant recent interest owing to the high critical power for self-focusing collapse at…
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…
Workshop Report: Workshop on Opportunities, Challenges, and Best Practices for Basic Plasma Science User Facilities (May 20-21, 2019, University of Maryland, College Park MD)
H. M. Milchberg, E. E. Scime
This is the report on the Workshop on Opportunities, Challenges, and Best Practices for Basic Plasma Science User Facilities, held at the University of Maryland, College Park, MD,…
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…
Low-Density Hydrodynamic Optical-Field-Ionized Plasma Channels Generated With An Axicon Lens
R. J. Shalloo, C. Arran, A. Picksley +9
We demonstrate optical guiding of high-intensity laser pulses in long, low density hydrodynamic optical-field-ionized (HOFI) plasma channels. An axicon lens is used to generate HOF…
Bound electron nonlinearity beyond the ionization threshold
J. K. Wahlstrand, S. Zahedpour, A. Bahl +2
Although high field laser-induced ionization is a fundamental process underlying many applications, there have been no absolute measurements of the nonlinear polarizability of atom…
Laser wakefield acceleration with mid-IR laser pulses
D. Woodbury, L. Feder, V. Shumakova +8
We report on the first results of laser plasma wakefield acceleration driven by ultrashort mid-infrared laser pulses (λ= 3.9 μm, 100 fs, 0.25 TW), which enable near- and above-crit…
Hydrodynamic, Optically-Field-Ionized (HOFI) Plasma Channels
Robert Shalloo, Christopher Arran, Laura Corner +5
We present experiments and numerical simulations which demonstrate that fully-ionized, low-density plasma channels could be formed by hydrodynamic expansion of plasma columns produ…
Two-photon vibrational excitation of air by long-wave infrared laser pulses
J. P. Palastro, J. Penano, L. A. Johnson +3
Ultrashort long-wave infrared (LWIR) laser pulses can resonantly excite vibrations in N2 and O2 through a two-photon transition. The absorptive, vibrational component of the ultraf…
Spatio-temporal optical vortices
N. Jhajj, I. Larkin, E. W. Rosenthal +3
We present the first experimental evidence, supported by theory and simulation, of spatiotemporal optical vortices (STOVs). Quantized STOVs are a fundamental element of the nonline…
Quasi-phasematched laser wakefield acceleration
S. J. Yoon, J. P. Palastro, H. M. Milchberg
The energy gain in laser wakefield acceleration (LWFA) is ultimately limited by dephasing, occurring when accelerated electrons outrun the accelerating phase of the wakefield. We a…
Comment on "Saturation of the All-Optical Kerr Effect"
J. K. Wahlstrand, H. M. Milchberg
Brée, Demircan, and Steinmeyer [Phys. Rev. Lett. 106, 183902 (2011)] recently calculated higher-order Kerr effect (HOKE) coefficients using the nonlinear Kramers-Kronig relations.…
Dual-gated bilayer graphene hot electron bolometer
J. Yan, M. -H. Kim, J. A. Elle +5
Detection of infrared light is central to diverse applications in security, medicine, astronomy, materials science, and biology. Often different materials and detection mechanisms…