Abstract

Abstract A recent study [PRB 100, 075427 (2019)], finally, demonstrated the plasmon-analog of refractive index enhancement in metal nanostructures (MNSs), which has already been studied in atomic clouds for several decades. Here, we simply utilize this phenomenon for achieving continuously-tunable enhanced Cherenkov radiation (CR) in MNSs. Beyond enabling CR from slow-moving particles, or increasing its intensity, the phenomenon can be used in continuous-tuning of the velocity cutoff of particles contributing to CR. More influentially, this allows a continuously-tunable analysis of the contributing particles as if the data is collected from many different detectors, which enables data correction. The phenomenon can also be integrated into lattice MNSs, for continuous medium tuning, where a high density of photonic states is present and the threshold for the CR can even be lifted. Additionally, vanishing absorption can heal radiation angle distortion effects caused by the metallic absorption.

Highlights

  • IntroductionA charged particle, moving with a constant velocity in a dielectric medium, emits the well-known Cherenkov

  • A charged particle, moving with a constant velocity in a dielectric medium, emits the well-known CherenkovRecent developments in the control and manufacturing of nanostructures (NSs) [8,9,10] enabled particle detectors based on metal nanostructures (MNSs) [11,12,13]

  • A recent study [PRB 100, 075427 (2019)], demonstrated the plasmon-analog of refractive index enhancement in metal nanostructures (MNSs), which has already been studied in atomic clouds for several decades

Read more

Summary

Introduction

A charged particle, moving with a constant velocity in a dielectric medium, emits the well-known Cherenkov. In current particle detectors, employing metal nanostructures, CR intensity is already enhanced due to the increased density of states [20] and the velocity threshold can even be lifted [21, 22]. None of these current detectors, can provide a continuous tuning, a continuous spectral analysis, of the particles’ velocities via CR. Particle detector, whether employing the nanoparticles or not, takes (records) the emission spectral data for the fixed parameters of the manufactured detector; even if the CR spectrum is enhanced and the threshold is lifted It analyses the particle velocity distribution, etc.

Index enhancement
Control of the CR
Summary

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.