Development and Characterization of Quasi-Optical Mesh Filters and Metastructures for Subterahertz and Terahertz Applications

Kuznetsov, S. А.; Arzhannikov, A. V.; Kubarev, V. V.; Kalinin, P. V.; Sorolla, M.; Navarro‐Cía, Miguel; Aznabet, M.; Beruete, Miguel; Falcone, Francisco; Goncharov, Yu. G.; Gorshunov, B.; Gelfand, Alexander V.; Fedorinina, N.I.

doi:10.4028/www.scientific.net/kem.437.276

Cited by 39 publications

(11 citation statements)

References 10 publications

(11 reference statements)

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“…The experimental characterization was carried out with an ABmm Vector Network Analyser (VNA) MVNA‐8‐350‐4 equipped with a quasioptical bench working in the reflection configuration. More information about the experimental methodology, preparation of samples and their fabrication via a contact photolithography technique adapted to flexible PP substrates can be found in the Supporting Information.…”

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

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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.

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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

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“…In accordance to this peculiarity of the selective properties of such filters it is required only two hardware filters instead of four for the 4-channel radiometric system thus reducing the production costs. The filters are implemented on the basis of photolithographically-produced 6 self-resonant metal meshes with topology of anisotropic slots (Fig. 2b).…”

Section: Experimental Set Upmentioning

confidence: 99%

Subterahertz Emission at Strong REB-Plasma Interaction in Multimirror Trap GOL-3

Аржанников

Бурдаков

Kuznetsov

et al. 2011

Fusion Science and Technology

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Investigation results for electromagnetic radiation emission induced by strong Langmuir turbulence driven by a microsecond relativistic electron beam are presented. The radiation is associated with a plasmonplasmon merging process, which generates photons at a double plasma frequency in the range of few hundredsGHz. An original radiometric system for radiation spectrum and power measurements is described.

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“…All the discussed MMS-based components are created in a qualified cycle of sequential stages: Electromagnetic modeling → Lithographic fabrication → Spectral characterization [7][8][9] .…”

Section: Methods and Thechniquesmentioning

confidence: 99%

“…Such a synthesis is proven to be very effective when metallized microstructures (MMSs) of subwavelength topology are employed for frequency selective manipulation of amplitude, phase and polarization properties of quasi-optical THz beams [1][2][3][4][5][6][7][8][9][10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Microstructured frequency selective quasi-optical components for subterahertz and terahertz applications

Kuznetsov

Astafyev²,

Аржанников

et al. 2013

2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

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Development and Characterization of Quasi-Optical Mesh Filters and Metastructures for Subterahertz and Terahertz Applications

Cited by 39 publications

References 10 publications

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

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

Subterahertz Emission at Strong REB-Plasma Interaction in Multimirror Trap GOL-3

Microstructured frequency selective quasi-optical components for subterahertz and terahertz applications

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