Independently Alterable Synthetic Multispectral Metamaterial Filter Based on Etalon Structure

Kang, Heyoung; Jung, Hyunseung; Lee, Ho-Jin

doi:10.1002/adom.201400622

Cited by 8 publications

(6 citation statements)

References 21 publications

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“…The substrate is polyimide (PI) with dielectric constant of 3 and loss tangent of 0.005 33 , which shows high transparency in the THz range 34 . The geometrical parameters of the unit cell are described in Fig.…”

Section: Structure Design and Principlementioning

confidence: 99%

“…Figure 1(a) schematically illustrates the geometry of the MMs structure, in which the unit cell is composed of a corrugated metal stripe perforated by three rectangle grooves periodically arrayed in x and y direction. The substrate is polyimide (PI) with dielectric constant of 3 and loss tangent of 0.005 33 , which shows high transparency in the THz range 34 . The geometrical parameters of the unit cell are described in Fig.…”

Section: Structure Design and Principlementioning

confidence: 99%

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Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

Wang

2017

Sci Rep

117

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A planar terahertz metamaterial sensor consisting of a corrugated metal stripe perforated by three rectangular grooves is proposed and investigated numerically. Due to the formation of Fabry-Perot resonance of the spoof surface plasmons mode on the corrugated metal stripe, the extremely sharp resonance in transmission spectrum associated with strong local field enhancement and high quality factor can be realized and exploited for ultrasensitive sensing. Since the intense interaction between electromagnetic waves and analyte materials, the frequency sensitivity of 1.966 THz per refractive index unit and the figure of merit of 19.86 can be achieved. Meanwhile, the film thickness sensitivity of this metamaterial sensor is higher than 52.5 GHz/μm when the analyte thickness is thinner than 4 μm. More interestingly, we find that the metal thickness has a great effect on the sensor performance. These findings open up opportunities for planar metamaterial structures to be developed into practical sensors in terahertz regime.

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Section: Structure Design and Principlementioning

confidence: 99%

Section: Structure Design and Principlementioning

confidence: 99%

Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

Wang

2017

Sci Rep

117

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“…It has been widely used in various applications, including spectral imaging 31,32 , optical data storage 33 , generation of security images 34 , energy-efficient displays [35][36][37] . The most common approach to design an optical filter is based on the Fabry-Pérot (FP) resonance, in which the properties are defined by adjusting the refractive index and the light path [38][39][40] . Conventionally, filters are designed based on a FP resonator using a pair of broadband high reflective mirrors.…”

Section: Introductionmentioning

confidence: 99%

Planar narrow bandpass filter based on Si resonant metasurface

Zheng

Komar

Kamali

et al. 2021

Journal of Applied Physics

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Optically resonant dielectric metasurfaces offer unique capability to fully control the wavefront, polarisation, intensity or spectral content of light based on the excitation and interference of different electric and magnetic Mie multipolar resonances. Recent advances of the wide accessibility in nanofabrication and nanotechnologies have led to a surge in the research field of high-quality functional optical metasurfaces which can potentially replace or even outperform conventional optical components with ultra-thin features. Replacing conventional optical filtering components with metasurface technology offers remarkable advantages including lower integration cost, ultra-thin compact configuration, easy combination with multiple functions and less restriction on materials. Here we propose and experimentally demonstrate a planar narrow band-pass filter based on the optical dielectric metasurface composed of Si nanoresonators in array. A broadband transmission spectral valley (around 200 nm) has been realised by combining electric and magnetic dipole resonances adjacent to each other. Meanwhile, we obtain a narrow-band transmission peak by exciting a high-quality leaky mode which is formed by partially breaking a bound state in the continuum generated by the collective longitudinal magnetic dipole resonances in the metasurface. Owing to the in-plane inversion symmetry of our nanostructure, the radiation of this antisymmetric mode is inhibited at far field, manifesting itself a sharp Fano-shape peak in the spectrum. Our proposed metasurface-based filter shows a stable performance for oblique light incidence with small angles (within 10 deg). Our work imply many potential applications of nanoscale photonics devices such as displays, spectroscopy, etc.

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“…Alternatively, etalon color filters based on the Fabry–Perot resonance are one of the traditional color filters, − in which the color properties are defined by adjusting the refractive index and the thickness of the dielectric spacer between two mirrors. Although conventional etalon color filters exhibit highly transmissive color properties, they have polarization-independent transmission spectra because they are considered an isotropic medium with respect to incident light.…”

mentioning

confidence: 99%

Polarization Selective Color Filter Based on Plasmonic Nanograting Embedded Etalon Structures

Jung

Choi

et al. 2020

Nano Lett.

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In this paper, we propose a polarization-selective color filter that can generate two different color informations simultaneously depending on the polarization direction. The proposed color filter is mainly composed of the etalon structure to generate the color by the structural resonance properties while the upper layer of the etalon is made of plasmonic nanogratings to promote polarization-dependent color properties. When the duty ratio of the silver nanogratings is fixed, the proposed color filter can maintain identical optical properties for orthogonal polarization, while the etalon structure of the proposed color filter can manipulate different color information depending on the cavity height for the horizontal polarization. Finally, we experimentally confirm that polarization-dependent security images can be generated using the proposed color filters with a fixed duty ratio of various nanograting arrays.

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Independently Alterable Synthetic Multispectral Metamaterial Filter Based on Etalon Structure

Cited by 8 publications

References 21 publications

Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

Ultrasensitive terahertz metamaterial sensor based on spoof surface plasmon

Planar narrow bandpass filter based on Si resonant metasurface

Polarization Selective Color Filter Based on Plasmonic Nanograting Embedded Etalon Structures

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