127 citations · 680 across the 36 of their papers we have counts for
36 papers
Nonlinear Compton scattering in a quantized pump field
Kenan Qu
We develop a fully quantized theory of nonlinear Compton scattering driven by a single-mode quantum field. Exact quantum-Volkov states retain pump depletion, back-action, and final…
Single-Shot Intensity-Correlation Diffractive X-ray Imaging of ICF Plasmas
Kenan Qu, Daniel Bhatti, Nathaniel J. Fisch
X-ray radiography of inertial confinement fusion plasmas is currently limited to several-micron resolution by geometric blur, diffraction, and photon-throughput tradeoffs. We propo…
Nonlinear Compton scattering in a frequency-modulated field
Antonino Di Piazza, Kenan Qu
When an electron is accelerated, it emits radiation. In the relativistic quantum realm the elementary radiation process is the emission of a single photon, a process known as nonli…
Detecting Solenoidal Plasma Turbulence via Laser Polarization Rotation
Kenan Qu, Nathaniel J. Fisch
Recent theoretical studies suggest that solenoidal turbulence can significantly enhance fusion reactivity, yet no standard diagnostic exists to directly measure these solenoidal fl…
Control of nonlinear Compton scattering in a squeezed vacuum
A. Di Piazza, K. Qu
Electromagnetic radiation by accelerated charges is a fundamental process in physics. Here, we introduce a quantum-optical framework for controlling the emission of radiation of an…
Ultra-strong Quantum Squeezing Mediated by Plasma Waves
Kenan Qu, Nathaniel J. Fisch
Quantum squeezed states enable precision measurements beyond the standard quantum limit, but conventional solid-state media fundamentally limit pump intensities to the ionization t…
Producing entangled photon pairs and quantum squeezed states in plasmas
Kenan Qu, Nathaniel J. Fisch
Plasma is capable of mediating the conversion of two pump photons into two different photons through a relativistic four-wave mixing nonlinearity. Spontaneously created photon pair…
Creating pair plasmas with observable collective effects
Kenan Qu, Sebastian Meuren, Nathaniel J. Fisch
Although existing technology cannot yet directly produce fields at the Schwinger level, experimental facilities can already explore strong-field QED phenomena by taking advantage o…
On parallel laser beam merger in plasmas
K. V. Lezhnin, Kenan Qu, N. J. Fisch +1
Self-focusing instability is a well-known phenomenon of nonlinear optics, which is of great importance in the field of laser-plasma interactions. Self-focusing instability leads to…
Radiation Reaction Kinetics and Collective QED Signatures
Alec Griffith, Kenan Qu, Nathaniel J. Fisch
Observing collective effects originating from the interplay between quantum electrodynamics and plasma physics might be achieved in upcoming experiments. In particular, the generat…
Simulations of Non-Integer Upconversion in Resonant Six-Wave Scattering
Alec Griffith, Kenan Qu, Nathaniel J. Fisch
Resonant upconversion through a sixth order relativistic nonlinearity resulting in a unique resonance was recently proposed [V. M. Malkin and N. J. Fisch, Physical Review E 108, 04…
Pair filamentation and laser scattering in beam-driven QED cascades
Kenan Qu, Alec Griffith, Nathaniel J. Fisch
We report the observation of longitudinal filamentation of an electron-positron pair plasma in a beam-driven QED cascade. The filaments are created in the "pair-reflection" regime,…
Focusability in the multi-pump Raman amplification of short laser pulses
K. V. Lezhnin, K. Qu, N. J. Fisch
Spatially combining multiple strong laser beams is a promising concept for achieving ultrahigh laser intensities. Proof-of-principle experiments have been conducted at the National…
Particle Deceleration for Collective QED Signatures
Alec Griffith, Kenan Qu, Nathaniel J. Fisch
Frequency upshifts have been proposed as a first experimental signature of collective effects in QED cascade generated electron-positron pair plasmas. Since the high effective mass…
Collective plasma effects of electron-positron pairs in beam-driven QED cascades
Kenan Qu, Sebastian Meuren, Nathaniel J. Fisch
Understanding the interplay of strong-field QED and collective plasma effects is important for explaining extreme astrophysical environments like magnetars. It has been shown that…
MP3 White Paper 2021 -- Research Opportunities Enabled by Co-locating Multi-Petawatt Lasers with Dense Ultra-Relativistic Electron Beams
Sebastian Meuren, David A. Reis, Roger Blandford +11
Novel emergent phenomena are expected to occur under conditions exceeding the QED critical electric field, where the vacuum becomes unstable to electron-positron pair production. T…
Generating optical supercontinuum and frequency comb in tenuous plasmas
Kenan Qu, Nathaniel J. Fisch
There are several mechanisms by which the frequency spectrum of a laser broadens when it propagates at near-relativistic-intensity in tenuous plasma. Focusing on one dimensional ef…
Modulation-Slippage Tradeoff in Resonant Four-Wave Upconversion
Alec Griffith, Kenan Qu, Nathaniel J. Fisch
Following up on a proposal to use four-wave mixing in an underdense plasma at mildly relativistic laser intensities to produce vastly more energetic x-ray pulses [V. M. Malkin and…
Suppression of power losses during laser pulse propagation in underdense plasma slab
K. V. Lezhnin, K. Qu, N. J. Fisch
For current state-of-the-art terawatt lasers, the primary laser scattering mechanisms in plasma include Forward Raman Scattering (FRS), excitation of plasma waves, and the self-mod…
Optical phase conjugation in backward Raman amplification
Qing Jia, Kenan Qu, Nathaniel J. Fisch
Compression of an intense laser pulse using backward Raman amplification (BRA) in plasma, followed by vacuum focusing to a small spot size, can produce unprecedented ultrarelativis…
On Seminal HEDP Research Opportunities Enabled by Colocating Multi-Petawatt Laser with High-Density Electron Beams
Sebastian Meuren, Phil H. Bucksbaum, Nathaniel J. Fisch +7
The scientific community is currently witnessing an expensive and worldwide race to achieve the highest possible light intensity. Within the next decade this effort is expected to…
Signature of Collective Plasma Effects in Beam-Driven QED Cascades
Kenan Qu, Sebastian Meuren, Nathaniel J. Fisch
QED cascades play an important role in extreme astrophysical environments like magnetars. They can also be produced by passing a relativistic electron beam through an intense laser…
Laser frequency upconversion in plasmas with finite ionization rates
Kenan Qu, Nathaniel J. Fisch
Laser frequency can be upconverted in a plasma undergoing ionization. For finite ionization rates, the laser pulse energy is partitioned into a pair of counter-propagating waves an…
Creating localized plasma wave by ionization of doped semiconductors
Kenan Qu, Nathaniel J. Fisch
Localized plasma waves can be generated by suddenly ionizing extrinsic semiconductors with spatially periodic dopant densities. The built-in electrostatic potentials at the metallu…