Cylindrical periodic surface lattice as a metadielectric: Concept of a surface-field Cherenkov source of coherent radiation

Konoplev, I. V.; MacLachlan, A. J.; Robertson, C. W.; Cross, A. W.; Phelps, A. D. R.

doi:10.1103/physreva.84.013826

Cited by 70 publications

(56 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7,8 Until now it has only been demonstrated that coupling between a wave at normal incidence and a surface field has been possible, 4 thus effectively denying the possibility of applying such structures to design an amplifier. In this paper we can now demonstrate that coupling between a "near grazing," obliquely incident wave and a surface field is possible if a high-contrast structure 6 (corrugation amplitude is larger than a quarter of the operating wavelength) is used. We are studying both low and high contrast Periodic Surface Lattice (PSLs), with the ultimate goal of designing a lattice exhibiting the properties that can enable it to support broadband amplification in the THz frequency range, demonstrating the possibility of tailoring artificial structures for a specific need.…”

mentioning

confidence: 99%

“…Such devices are required for weather radar applications, for tracking nano-satellites and space debris, as well as for plasma diagnostics, volcano monitoring, and quality control of pharmaceutical products, and for the study of historical artefacts. [1][2][3] In recent work, [4][5][6] it has been suggested that periodic patterns machined on the inner surface of a cylindrical conductor exhibit properties of a thin dielectric layer allowing such phenomena as Cherenkov instabilities to be observed. In particular this is an attractive possibility for creating high-intensity sources of THz radiation driven by mildly relativistic electron beams, as such structures should allow very effective heat, stress, and electric charge management via their quick dissipation into the main body "sink" of the material.…”

mentioning

confidence: 99%

“…In particular this is an attractive possibility for creating high-intensity sources of THz radiation driven by mildly relativistic electron beams, as such structures should allow very effective heat, stress, and electric charge management via their quick dissipation into the main body "sink" of the material. Conventionally the surface periodic structures previously considered [4][5][6][7][8] were low contrast (the corrugation amplitude is less than a quarter of the operating wavelength) and were used as distributed mirrors and high-Q cavities or low contrast interaction regions to mediate a Cherenkov instability. 7,8 Until now it has only been demonstrated that coupling between a wave at normal incidence and a surface field has been possible, 4 thus effectively denying the possibility of applying such structures to design an amplifier.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Surface field excitation by an obliquely incident wave

Konoplev

Phipps

Phelps

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Surface field excitation by an obliquely incident wave

Konoplev

Phipps

Phelps

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Smart dispersion engineering is having a positive impact on mm-wave source research, leading to improved high-power coherent sources [1][2][3][4][5][6]. Two dimensional periodic surface lattices (PSLs) [3,4] can be created by manufacturing shallow periodic perturbations on the inner surface of a hollow electrically conducting cylinder.…”

Section: Introductionmentioning

confidence: 99%

Measurement of 30kW output from a W-band source constructed by additive manufacturing

Phipps

MacLachlan

Robertson

et al. 2017

2017 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT)

Self Cite

View full text Add to dashboard Cite

This version is available at https://strathprints.strath.ac.uk/62835/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.Author Accepted Manuscript: Paper accepted by IEEE 10th UK-Europe-China Workshop on Millimetre Waves and Terahertz Technologies (UCMMT), 11-13 September 2016, Liverpool, UK. Published online by IEEE Xplore, 16 October 2017.1 Abstract-Experimental results from the operation of an electron beam driven, mm-wave, vacuum electronic source are reported. The aim of this work is to create improved electronbeam-driven, vacuum electronic mm-wave and sub-THz sources by exploiting dispersion-engineering. Dispersion-engineered structures can be manufactured by several techniques and in this work additive manufacturing has proven to be quick, reliable and cost-effective.

show abstract

“…The main research themes include gyro-devices with particular emphasis on gyro-TWAs [1,2] and gyro-BWOs, and natural sources of radiation such as auroral kilometric radiation (AKR) [3][4][5][6], novel Cherenkov mm-wave sources [7,8] and pseudospark-driven sub-THz sources [9][10][11].…”

mentioning

confidence: 99%

Progress in microwave to sub-THz sources at Strathclyde

Phelps

2017

EPJ Web Conf.

Self Cite

View full text Add to dashboard Cite

Research progress during recent years at the University of Strathclyde is presented. The main research themes include gyro-devices with particular emphasis on gyro-TWAs [1,2] and gyro-BWOs, and natural sources of radiation such as auroral kilometric radiation (AKR) [3][4][5][6], novel Cherenkov mm-wave sources [7,8] and pseudospark-driven sub-THz sources [9][10][11].While there has been some theoretical work, the majority of the research has involved either laboratory experiments, or numerical simulations. Gyro-devicesMost of the work on gyro-devices has involved helical waveguide interaction structures [1,2]. This interest began in the 1990's stimulated by collaborative research with IAP. The early experiments were in the 10GHz frequency range, whereas our more recent experiments have been in the 90 to 100 GHz range. The applications for these mm-wave amplifiers include DNP-NMR, cloud radar and communications, etc. Fig. 1. Gyro-TWA, 90 -100 GHzThe gyro-TWA shown in Fig. 1 has produced 3.4kW output power. The limit on the output power is presently the maximum power that is available at the input to the amplifier. Natural sources of EM radiationPrevious research on laboratory gyro-devices and electron cyclotron masers has provided the background for investigations of the mechanism of some naturally occurring sources of electromagnetic radiation. A research programme stretching over more than 10 years has explored the detailed mechanism of auroral kilometric radiation (AKR) and similar emissions emanating from other astrophysical bodies. Laboratory experiments to simulate the natural phenomena, combined with theoretical analysis and numerical modelling have been compared with natural observations. Using all four approaches it has been possible to understand how AKR arises and the mechanism by which the energy in electron streams can be converted with 1% or 2% efficiency into AKR. The mechanism depends upon the existence of an anisotropy in velocity space. This anisotropy is created when electrons are spiralling down the magnetospheric field lines. The magnetic moment is an adiabatic invariant of the electron motion and as the electrons penetrate further into the increasing magnetic field the electrons increase the perpendicular component of their velocity and decrease the component of their velocity parallel to the magnetic field lines. This results in a horseshoe shaped particle distribution in velocity space. The positive value of the gradient with respect to the perpendicular velocity component of the distribution function drives this kinetic instability that is now known as the "horseshoe instability". The theoretical analysis, the PiC simulations, the laboratory experiment and the space observations all agree. Fig. 2. Cylindrical over-sized Cherenkov structure Cherenkov sourcesOne of the aims of the research on Cherenkov sources is to retain reasonably high output power levels as the frequency increases. Traditionally Cherenkov sources have followed the trend that as the frequency increases and the wavelength...

show abstract

Cylindrical periodic surface lattice as a metadielectric: Concept of a surface-field Cherenkov source of coherent radiation

Cited by 70 publications

References 51 publications

Surface field excitation by an obliquely incident wave

Surface field excitation by an obliquely incident wave

Measurement of 30kW output from a W-band source constructed by additive manufacturing

Progress in microwave to sub-THz sources at Strathclyde

Contact Info

Product

Resources

About