Using Two-Dimensional Distributed Feedback for Synchronization of Radiation from Two Parallel-Sheet Electron Beams in a Free-Electron Maser

Аржанников, А. В.; Ginzburg, N. S.; Kalinin, P. V.; Kuznetsov, S. А.; Malkin, A. M.; Peskov, N. Yu.; Sergeev, A. S.; Sinitsky, S. L.; Степанов, В. Д.; Thumm, M.; Zaslavsky, V. Yu.

doi:10.1103/physrevlett.117.114801

Cited by 64 publications

(26 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Originally, the labyrinth metasurfaces were developed for using without the GP‐layer and were intended for filtering applications in diagnostic systems of millimeter‐wave radiation generated in schemes with free‐electron masing and electron‐beam‐induced emission from hot magnetized plasmas . The metasurface pattern was designed to fix the passband near 75 GHz and achieve at the same time strong suppression around 150 GHz combined with the requirement of maintaining a super‐stable spectral characteristic under oblique illumination (Figure ).…”

Section: Sensitivity and Fom For Each Analyte Thickness For The Samplmentioning

confidence: 99%

Labyrinth Metasurface Absorber for Ultra‐High‐Sensitivity Terahertz Thin Film Sensing

Jáuregui-López

Rodríguez-Ulibarri

Urrutia

et al. 2018

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

In this work, a labyrinth metasurface sensor operating at the low-frequency edge of the THz band is presented. Its intricate shape leads to a high electric field confinement on the surface of the structure, resulting in ultrasensitive performance, able to detect samples of the order of tens of nanometers at a wavelength of the order of millimeters (i.e., five orders of magnitude larger). The sensing capabilities of the labyrinth metasurface are evaluated numerically and experimentally by covering the metallic face with tin dioxide (SnO 2 ) thin films with thicknesses ranging from 24 to 345 nm. A redshift of the resonant frequency is observed as the analyte thickness increases, until reaching a thickness of 20 μm, where the response saturates. A maximum sensitivity of more than 800 and a figure of merit near 4500 nm À1 are achieved, allowing discriminating differences in the SnO 2 thickness of less than 25 nm, and improving previous works by a factor of 35. This result can open a new paradigm of ultrasensitive devices based on intricate metageometries overcoming the limitations of classical metasurface sensor designs based on periodic metaatoms.The THz band (ranging from 0.1 to 10 THz) has been historically known as the "THz gap" [1] due to the lack of efficient emitters and receivers operating in this regime at ambient temperature. However, a series of recent breakthroughs have helped to bridge this gap, to the point that nowadays it is a field of intense and multidisciplinary research with many applications coming into reality in numerous sectors, like medicine, security, communications, space, or sensing, among others. [2] Sensing at THz is of special relevance, because many substances exhibit molecular vibrations opening new routes for high performance detection platforms, allowing the identification of certain gases or solids that show absorption lines in this frequency range. Moreover, due to a larger wavelength and deeper penetration into many materials versus the visible or infrared ranges, THz waves are promising for examining optically opaque coatings. To date, several strategies have been followed to develop THz sensing devices such as plasmonic structures, [3] metamaterials, [4] and frequency selective surfaces, [5] among others.

show abstract

Section: Sensitivity and Fom For Each Analyte Thickness For The Samplmentioning

confidence: 99%

Labyrinth Metasurface Absorber for Ultra‐High‐Sensitivity Terahertz Thin Film Sensing

Jáuregui-López

Rodríguez-Ulibarri

Urrutia

et al. 2018

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

show abstract

“…which provides coupling and mutual scattering of the four wavebeams (Fig.4b) Experimental studies of free electron masers (FEMs) based on the novel feedback mechanism have been performed in Ka-band and in W-band in collaboration with the Institute of Applied Physics RAS [4]. As a result, narrow-band generation with an output power of 50 -100 MW, which is a record for millimeter wavelength FEMs, was obtained.…”

Section: Ka-band Surface-wave Oscillator Based On 2d Periodical Corrumentioning

confidence: 99%

Generation of Sub-Terahertz Surface Waves by Relativistic Electron Beams: Quasioptical Theory, Simulations and Experiments

et al. 2018

View full text Add to dashboard Cite

“…Теоретическое и экспериментальное исследования планарных схем МСЭ с брэгговскими резонаторами активно ведутся в настоящее время в сотрудничестве ИЯФ СО РАН (Новосибирск) и ИПФ РАН (Н. Новгород) [13][14][15][16]. Указанная геометрия позволяет также использовать брэгговские структуры с так называемой " наклонной" гофрировкой для управления направлением распространения рассеянной парциальной волны по отношению к падающей.…”

Section: Introductionunclassified

Брэгговские Дефлекторы Волновых Потоков Для Мощных Релятивистских Мазеров

Аржанников¹,

Гинзбург²,

Заславский³

et al. 2019

Журнал Технической Физики

View full text Add to dashboard Cite

Quasi-optical Bragg structures that represent sections of planar waveguides with tilted (with respect to the beam propagation direction) corrugation are studied. It is shown that such structures may serve as efficient deflectors for high-power wave fluxes and, hence, can be used for separation of microwave radiation and electron beam in relativistic masers. The corrugation configuration is optimized to increase the efficiency of transformation of wave fluxes to the transverse direction and improve uniformity of the spatial distribution of scattered radiation. The simulated results are verified using cold electrodynamic tests.

show abstract

Using Two-Dimensional Distributed Feedback for Synchronization of Radiation from Two Parallel-Sheet Electron Beams in a Free-Electron Maser

Cited by 64 publications

References 20 publications

Labyrinth Metasurface Absorber for Ultra‐High‐Sensitivity Terahertz Thin Film Sensing

Labyrinth Metasurface Absorber for Ultra‐High‐Sensitivity Terahertz Thin Film Sensing

Generation of Sub-Terahertz Surface Waves by Relativistic Electron Beams: Quasioptical Theory, Simulations and Experiments

Брэгговские Дефлекторы Волновых Потоков Для Мощных Релятивистских Мазеров

Contact Info

Product

Resources

About