Fast Surface-Plasmon-Mediated Electro-Optics of a Liquid Crystal on a Metal Grating

Gorkunov, M. V.; Kasyanova, I. V.; Артемов, В. В.; Barnik, M. I.; Гейвандов, А. Р.; Palto, S. P.

doi:10.1103/physrevapplied.8.054051

Cited by 24 publications

(17 citation statements)

References 36 publications

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“…The development of new tunable structures is the second major field of research. Recently, planar structures utilizing plasmonic or slow wave effects have been presented [53][54][55]. These structures show a huge potential, as they faciitate integration.…”

Section: Discussionmentioning

confidence: 99%

Microwave Liquid Crystal Technology

et al. 2018

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Tunable Liquid Crystal (LC)-based microwave components are of increasing interest in academia and industry. Based on these components, numerous applications can be targeted such as tunable microwave filters and beam-steering antenna systems. With the commercialization of first LC-steered antennas for Ku-band e.g., by Kymeta and Alcan Systems, LC-based microwave components left early research stages behind. With the introduction of terrestrial 5G communications systems, moving to millimeter-wave communication, these systems can benefit from the unique properties of LC in terms of material quality. In this paper, we show recent developments in millimeter wave phase shifters for antenna arrays. The limits of classical high-performance metallic rectangular waveguides are clearly identified. A new implementation with dielectric waveguides is presented and compared to classic approaches.

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Section: Discussionmentioning

confidence: 99%

Microwave Liquid Crystal Technology

et al. 2018

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“…An LC device exhibits compactness, lightweight, low power consumption, and low driving voltage for all application fields in the optics and photonics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Furthermore, some optical control devices, such as variable focusing lenses, beam-steering prisms, and polarization control devices, gained attention in conjunction with conventional LC device applications, such as spatial light modulators and phase shifters [12][13][14][15][16][17][18]. Recently, it became evident that LC materials have a large birefringence in the wider frequency range of the electromagnetic wave spectra, such as microwave, millimeter wave (MMW), and THz regions [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Potential of Liquid-Crystal Materials for Millimeter-Wave Application

2018

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In this study, we reviewed three topics regarding the application of liquid-crystal (LC) materials to millimeter-wave (MMW) devices. It is essential to develop useful measurement methods for refractive indices of LC materials in the MMW region. Herein, a novel measurement method using optical short is demonstrated using a Si semiconductor substrate. There are two approaches to develop MMW LC devices. One is the quasi-optical approach, which involves scaling up the optical components, and the other approach involves integrating the LC materials into high-frequency electric circuits. A three-dimensional (3D) printer is used to fabricate the Fresnel lens, which is a typical quasi-optical device useful in the MMW region, where we can develop the tunable lens by introducing LC materials. A planar-type MMW waveguide is advantageous for integrating the LC materials to develop LC MMW devices using the second approach. We investigated a useful microstrip-line-type LC phase shifter by developing a novel conversion circuit to introduce the LC material onto the dielectric substrate surface. A phase shifter is an important MMW component that is used to attain a phased array antenna system, and a minimal twin antenna array is demonstrated using the microstrip-line-type LC phase shifters.

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“…We argue that the operational principle of LC-based SLMs can be readily extended on the spatial modulation of terahertz wavefronts with the use of metamaterial technology. Metamaterials have revolutionized the way electromagnetic waves can be manipulated and controlled and enabled a substantial improvement in the performance of terahertz devices. − In particular, efficient modulation of THz radiation was achieved by hybridizing metamaterials with chalcogenides, , phase change metal oxides, , semiconductors, , micro electro-mechanical systems, , and graphene. , LC-hybridized metamaterials have contributed significantly to the development of effective modulators, , tunable filters, , switchers, , and SLMs , for a wide spectral range from visible to THz frequencies. A particularly efficient electrically driven mechanism of amplitude and phase modulation of THz radiation has been demonstrated in transmission with a thin low-voltage LC cell combined with a resonant 2D metamaterial and, later, 3D metamaterial .…”

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confidence: 99%

Metasurface-Based Optical Liquid Crystal Cell as an Ultrathin Spatial Phase Modulator for THz Applications

et al. 2020

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A concept of an efficient ultra-thin spatial phase modulator for correcting terahertz wavefronts in transmission with sub-wavelength spatial resolution is experimentally demonstrated.It exploits a combination of spatially addressable resonant planar metamaterials (so-called metasurfaces) and an optically thin (< 0.04 λ) low-voltage (< 20 V) liquid crystal cell. The device allows 'imprinting' 2D phase profile of any spatial complexity with a spatial resolution better than 0.23 λ, and can be readily fabricated using the well-established LC-device technology and highresolution photolithography technique.

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Fast Surface-Plasmon-Mediated Electro-Optics of a Liquid Crystal on a Metal Grating

Cited by 24 publications

References 36 publications

Microwave Liquid Crystal Technology

Microwave Liquid Crystal Technology

Potential of Liquid-Crystal Materials for Millimeter-Wave Application

Metasurface-Based Optical Liquid Crystal Cell as an Ultrathin Spatial Phase Modulator for THz Applications

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