Xinglai Shen
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View article: Design and testing of ultrafast plasmonic lens nanoemitters
Design and testing of ultrafast plasmonic lens nanoemitters Open
Nanoscale electron pulses are increasingly in demand, including as probes of nanoscale ultrafast dynamics and for emerging light source and lithography applications. Using electromagnetic simulations, we show that gold plasmonic lenses as …
View article: Challenges in simulating beam dynamics of dielectric laser acceleration
Challenges in simulating beam dynamics of dielectric laser acceleration Open
Dielectric Laser Acceleration (DLA) achieves the highest gradients among structure-based electron accelerators. The use of dielectrics increases the breakdown field limit, and thus the achievable gradient, by a factor of at least 10 in com…
View article: A THz driven split-ring resonator based ultrafast relativistic electron streak camera
A THz driven split-ring resonator based ultrafast relativistic electron streak camera Open
The use of sub-wavelength metal structures to locally enhance high frequency electromagnetic fields, generally known as plasmonics, enables breakthrough opportunities across diverse fields of research such as nonlinear optics, biosensing, …
View article: High-field nonlinear optical response and phase control in a dielectric laser accelerator
High-field nonlinear optical response and phase control in a dielectric laser accelerator Open
Advances in ultrafast laser technology and nanofabrication have enabled a new class of particle accelerator based upon miniaturized laser-driven photonic structures. However, developing a useful accelerator based on this approach requires …
View article: Optical design for increased interaction length in a high gradient dielectric laser accelerator
Optical design for increased interaction length in a high gradient dielectric laser accelerator Open
We present a methodology for designing and measuring pulse front tilt in an ultrafast laser for use in dielectric laser acceleration. Previous research into dielectric laser accelerating modules has focused on measuring high accelerating g…
View article: Multi-photon Photoemission and Ultrafast Electron Heating in Cu Photocathodes at Threshold
Multi-photon Photoemission and Ultrafast Electron Heating in Cu Photocathodes at Threshold Open
Operating photocathodes near the photoemission threshold holds the promise of yielding small intrinsic emittance, at the cost of significantly reduced quantum efficiency. In modern femtosecond photoemission electron sources, this requires …
View article: Phenomenological model for spectral broadening of incoherent light in fibers via self-phase modulation and dispersion
Phenomenological model for spectral broadening of incoherent light in fibers via self-phase modulation and dispersion Open
A phenomenological model for spectral broadening of incoherent light in\nsilica fibers via self-phase modulation and dispersion is presented, aiming at\nproviding a qualitative and readily accessible description of incoherent light\nspectr…
View article: Self-phase modulation of nanosecond pulses in fiber amplifiers with gain saturation
Self-phase modulation of nanosecond pulses in fiber amplifiers with gain saturation Open
SPM is an important limitation in some fiber lasers and amplifier systems. In this paper, the influence of gain saturation on the SPM-induced spectral broadening for coherent and incoherent nanosecond pulses is discussed. The models of SPM…
View article: Review of fiber superluminescent pulse amplifications
Review of fiber superluminescent pulse amplifications Open
High coherence of the laser is indispensable light sources in modern long or short-distance imaging systems, because the high coherence leads to coherent artifacts such as speckle that corrupt image formation. To deliver low coherence puls…