248 citations · 994 across the 19 of their papers we have counts for
21 papers
Megabar Shocks on a Benchtop
Yun Kai, Min Kim, Senpeng Lin +9
Techniques to generate megabar (100 GPa) pressure are critical for the study of materials under extreme conditions. However, kJ-class lasers are typically needed to generate such e…
Nanophotonic control of spatial information in scintillation detectors
Joshua Chen, Simo Pajovic, Seou Choi +9
X-rays enable non-invasive imaging across medicine, security, materials science, and beyond, yet modern systems remain constrained by the need to resolve finer structures at lower…
Nanophotonic thermal management in X-ray tubes
Simo Pajovic, Charles Roques-Carmes, Seou Choi +5
In X-ray tubes, more than 99% of the kilowatts of power supplied to generate X-rays via bremsstrahlung are lost in the form of heat generation in the anode. Therefore, thermal mana…
Large-scale self-assembled nanophotonic scintillators for X-ray imaging
Louis Martin-Monier, Simo Pajovic, Muluneh G. Abebe +9
Scintillators are essential for converting X-ray energy into visible light in imaging technologies. Their widespread application in imaging technologies has been enabled by scalabl…
Biasing the quantum vacuum to control macroscopic probability distributions
Charles Roques-Carmes, Yannick Salamin, Jamison Sloan +7
One of the most important insights of quantum field theory is that electromagnetic fields must fluctuate. Even in the vacuum state, the electric and magnetic fields have a nonzero…
High-power laser beam shaping using a metasurface for shock excitation and focusing at the microscale
Yun Kai, Jet Lem, Marcus Ossiander +6
Achieving high repeatability and efficiency in laser-induced strong shock wave excitation remains a significant technical challenge, as evidenced by the extensive efforts undertake…
Additive Laser Excitation of Giant Nonlinear Surface Acoustic Wave Pulses
Jude Deschamps, Yun Kai, Jet Lem +6
The laser ultrasonics technique perfectly fits the needs for non-contact, non-invasive, non-destructive mechanical probing of samples of mm to nm sizes. This technique is however l…
Free-electron-light interactions in nanophotonics
Charles Roques-Carmes, Steven E. Kooi, Yi Yang +7
When impinging on optical structures or passing in their vicinity, free electrons can spontaneously emit electromagnetic radiation, a phenomenon generally known as cathodoluminesce…
Nonlinear optical absorption in nanoscale films revealed through ultrafast acoustics
Ievgeniia Chaban, Radoslaw Deska, Gael Privault +7
Herein we describe a novel spinning pump-probe photoacoustic technique developed to study nonlinear absorption in thin films. As a test case, an organic polycrystalline thin film o…
A general framework for scintillation in nanophotonics
Charles Roques-Carmes, Nicholas Rivera, Ali Ghorashi +12
Bombardment of materials by high-energy particles (e.g., electrons, nuclei, X- and -ray photons) often leads to light emission, known generally as scintillation. Scintillation i…
Observation of enhanced free-electron radiation from photonic flatband resonances
Yi Yang, Charles Roques-Carmes, Steven E. Kooi +6
Flatbands emerge from a myriad of structures such as Landau levels, Lieb and Kagome lattices, linegraphs, and more recently moire superlattices. They enable unique properties inclu…
Towards 3D-Printed Inverse-Designed Metaoptics
Charles Roques-Carmes, Zin Lin, Rasmus E. Christiansen +5
Optical metasurfaces have been heralded as the platform to integrate multiple functionalities in a compact form-factor, potentially replacing bulky components. A central stepping s…
High-velocity micro-projectile impact testing
David Veysset, Jae-Hwang Lee, Mostafa Hassani +3
High-velocity microparticle impacts are relevant to many fields from space exploration to additive manufacturing and can be used to help understand the physical and chemical behavi…
Fullwave Maxwell inverse design of axisymmetric, tunable, and multi-scale multi-wavelength metalenses
Rasmus E. Christiansen, Zin Lin, Charles Roques Carmes +5
We demonstrate new axisymmetric inverse-design techniques that can solve problems radically different from traditional lenses, including \emph{reconfigurable} lenses (that shift a…
Laser-Driven High-Velocity Microparticle Launcher In Atmosphere And Under Vacuum
David Veysset, Yuchen Sun, Steven E. Kooi +2
This paper presents a novel approach to launch single microparticles at high velocities under low vacuum conditions. In an all-optical table-top method, microparticles with sizes r…
Multi-frame Interferometric Imaging with a Femtosecond Stroboscopic Pulse Train for Observing Irreversible Phenomena
Dmitro Martynowych, David Veysset, Alexei A. Maznev +3
We describe a high-speed single-shot multi-frame interferometric imaging technique enabling multiple interferometric images with femtosecond exposure time over a 50 ns event window…
Maximal Spontaneous Photon Emission and Energy Loss from Free Electrons
Yi Yang, Aviram Massuda, Charles Roques-Carmes +7
Free electron radiation such as Cerenkov, Smith--Purcell, and transition radiation can be greatly affected by structured optical environments, as has been demonstrated in a variety…
Smith-Purcell Radiation from Low-Energy Electrons
Aviram Massuda, Charles Roques-Carmes, Yujia Yang +6
Recent advances in the fabrication of nanostructures and nanoscale features in metasurfaces offer a new prospect for generating visible, light emission from low energy electrons. I…
Single-bubble and multi-bubble cavitation in water triggered by laser-driven focusing shock waves
D. Veysset, U. Gutiérrez-Hernández, L. Dresselhaus-Cooper +5
In this study a single laser pulse spatially shaped into a ring is focused into a thin water layer, creating an annular cavitation bubble and cylindrical shock waves: an outer shoc…
Development of Single-Shot Multi-Frame Imaging of Cylindrical Shock Waves in a Multi-Layered Assembly
Leora Dresselhaus-Cooper, Joshua E. Gorfain, Chris T. Key +6
We demonstrate single-shot multi-frame imaging of quasi-2D cylindrically converging shock waves as they propagate through a multi-layer target sample assembly. We visualize the sho…
Direct Visualization of Laser-Driven Focusing Shock Waves
Thomas Pezeril, Gagan Saini, David Veysset +4
Cylindrically or spherically focusing shock waves have been of keen interest for the past several decades. In addition to fundamental study of materials under extreme conditions, c…