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您的检索式：作者名="Nicholas Rivera"
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| 1 | Metasurface-based multi-harmonic freeelectron light source显示文摘Metasurfaces are subwavelength spatial variations in geometry and material where the structures are of negligible thickness compared to the wavelength of light and are optimized for far-field applications,such as controlling the wavefronts of electromagnetic waves.Here,we investigate the potential of the metasurface near-field profile,generated by an incident few-cycle pulse laser,to facilitate the generation of high-frequency light from free electrons.In particular,the metasurface near-field contains higher-order spatial harmonics that can be leveraged to generate multiple higher-harmonic X-ray frequency peaks.We show that the X-ray spectral profile can be arbitrarily shaped by controlling the metasurface geometry,the electron energy,and the incidence angle of the laser input.Using ab initio simulations,we predict bright and monoenergetic X-rays,achieving energies of 30 keV(with harmonics spaced by 3 keV)from 5-MeV electrons using 3.4-eV plasmon polaritons on a metasurface with a period of 85 nm.As an example,we present the design of a four-color X-ray source,a potential candidate for tabletop multicolor hard X-ray spectroscopy.Our developments could help pave the way for compact multi-harmonic sources of high-energy photons,which have potential applications in industry,medicine,and the fundamental sciences. | Gilles Rosolen Liang Jie Wong Nicholas Rivera Bjorn Maes Marin Soljačić Ido Kaminer | 2018 | Light(Science & Applications)2018，7，1： | 2 |
| 2 | Schottky diodes based on electrospun polyaniline nanofibers: Effects of varying fiber diameter and doping level on device performance显示文摘 | Rut Rivera Nicholas J. Pinto | 2008 | Physica E: Low-dimensional Systems and Nanostructures2008，，3： | 1 |
| 3 | Creating heralded hyper-entangled photons using Rydberg atoms显示文摘Entangled photon pairs are a fundamental component for testing the foundations of quantum mechanics,and for modern quantum technologies such as teleportation and secured communication.Current state-of-the-art sources are based on nonlinear processes that are limited in their efficiency and wavelength tunability.This motivates the exploration of physical mechanisms for entangled photon generation,with a special interest in mechanisms that can be heralded,preferably at telecommunications wavelengths.Here we present a mechanism for the generation of heralded entangled photons from Rydberg atom cavity quantum electrodynamics(cavity QED).We propose a scheme to demonstrate the mechanism and quantify its expected performance.The heralding of the process enables non-destructive detection of the photon pairs.The entangled photons are produced by exciting a rubidium atom to a Rydberg state,from where the atom decays via two-photon emission(TPE).A Rydberg blockade helps to excite a single Rydberg excitation while the input light field is more efficiently collectively absorbed by all the atoms.The TPE rate is significantly enhanced by a designed photonic cavity,whose many resonances also translate into high-dimensional entanglement.The resulting high-dimensionally entangled photons are entangled in more than one degree of freedom:in all of their spectral components,in addition to the polarization—forming a hyperentangled state,which is particularly interesting in high information capacity quantum communication.We characterize the photon comb states by analyzing the Hong-Ou-Mandel interference and propose proof-of-concept experiments. | Sutapa Ghosh Nicholas Rivera Gadi Eisenstein Ido Kaminer | 2021 | Light(Science & Applications)2021，10，7： | 0 |
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