Broadband terahertz metamaterial absorber based on tantalum nitride

Deng, Guangsheng; Yang, Jun; Yin, Zhiping

doi:10.1364/ao.56.002449

Cited by 73 publications

(20 citation statements)

References 29 publications

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“…Ag [24,26] Au [6,9,10,21,29,40,62,63] Cu [38,64,65] Al [66] Mo [36] W [67] Ti [68] Pd [69] Cr [70,71] Ni [72] Ta [72] ITO [73] TiN [16] AZO [72] Ta 2 N 3 [74] [71]…”

Section: Metal Dielectricmentioning

confidence: 99%

Broadband Metamaterial Absorbers

Besteiro

Huang

et al. 2018

Advanced Optical Materials

465

269

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The recent rise of metamaterials opens new opportunities for absorbers due to their designed electrodynamic properties and effects, allowing the creation of materials with effective values of permittivity and permeability that are not available in naturally occurring materials. Since their first experimental demonstration in 2008, recent literature has offered great advances in metamaterial This article is protected by copyright. All rights reserved. 2 perfect absorber (MMPA) operating at frequencies from radio to optical. Broadband absorbers are indispensable in thermophotovoltaics, photodetection, bolometry and manipulation of mechanical resonances. Although it is easy to obtain MMPA with single band or above, achieving broadband MMPA (BMMPA) remains a challenge due to the intrinsically narrow bandwidth of surface plasmon polaritons, localized surface plasmon resonances generated on metallic surfaces at nanoscale or high Q-factor in GHz region. To guide future development of BMMPA, recent progress is reviewed here: the methods to create broadband absorption and their potential applications. The four mainstream methods to achieve BMMPA are introduced, including planar and vertical element arrangements, their welding with lumped elements and the use of plasmonic nanocomposites, accompanied by the description of other, less common approaches. Following this, applications of BMMPA in solar photovoltaics, photodetection, bolometry and manipulation of mechanical resonances are reviewed. Finally, challenges and prospects are discussed.

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“…Ag [24,26] Au [6,9,10,21,29,40,62,63] Cu [38,64,65] Al [66] Mo [36] W [67] Ti [68] Pd [69] Cr [70,71] Ni [72] Ta [72] ITO [73] TiN [16] AZO [72] Ta 2 N 3 [74] [71]…”

Section: Metal Dielectricmentioning

confidence: 99%

Broadband Metamaterial Absorbers

Besteiro

Huang

et al. 2018

Advanced Optical Materials

465

269

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“…Such advances in THz applications have been stimulated by the improvement in functional THz devices such as filters [23][24][25][26][27][28], switches [29][30][31][32][33][34], and sensors [35][36][37][38][39][40]. Artificially structured metamaterials in subwavelength scale, especially, provide us with the ability to control THz responses over the broad bandwidths [41][42][43][44][45][46], determined by key parameters: length scale [47,48], geometry [49], and surrounding materials [50,51]. The dielectric properties of these metamaterials, changeable by optical [24,[52][53][54], electrical [55,56], thermal [57][58][59], or other mechanical [60][61][62] means, with or without lateral patterns, are in turn used to control transmission or reflection behavior over entire THz frequencies, further extending device performance.…”

Section: Introductionmentioning

confidence: 99%

Terahertz wave interaction with metallic nanostructures

2018

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Understanding light interaction with metallic structures provides opportunities of manipulation of light, and is at the core of various research areas including terahertz (THz) optics from which diverse applications are now emerging. For instance, THz waves take full advantage of the interaction to have strong field enhancement that compensates their relatively low photon energy. As the THz field enhancement have boosted THz nonlinear studies and relevant applications, further understanding of light interaction with metallic structures is essential for advanced manipulation of light that will bring about subsequent development of THz optics. In this review, we discuss THz wave interaction with deep sub-wavelength nano structures. With focusing on the THz field enhancement by nano structures, we review fundamentals of giant field enhancement that emerges from non-resonant and resonant interactions of THz waves with nano structures in both sub- and super- skin-depth thicknesses. From that, we introduce surprisingly simple description of the field enhancement valid over many orders of magnitudes of conductivity of metal as well as many orders of magnitudes of the metal thickness. We also discuss THz interaction with structures in angstrom scale, by reviewing plasmonic quantum effect and electron tunneling with consequent nonlinear behaviors. Finally, as applications of THz interaction with nano structures, we introduce new types of THz molecule sensors, exhibiting ultrasensitive and highly selective functionalities.

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“…These applications greatly benefit from extra functionalities and extraordinary properties of metamaterial structures. Various shapes of conventional MAs may be designed based on two different mechanisms, that is, metamaterial resonator structure and metal‐dielectric‐metal structure . The electric and magnetic fields of the incident field may separately couple to the metamaterial resonator structure.…”

Section: Introductionmentioning

confidence: 99%

Optically transparent and single-band metamaterial absorber based on indium-tin-oxide

Yin

Gao

et al. 2018

Int J RF Microw Comput Aided Eng

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This article proposes and experimentally demonstrates an optically transparent and polarization‐insensitive metamaterial absorber in the terahertz (THz) frequencies. The absorber is formed by indium‐tin‐oxide (ITO) resistive films, providing efficient absorption with absorptivity of 94.1% at the peak absorption frequency of 120.8 GHz. We systematically investigate the surface current distribution and the power loss analysis, and explain the architecture of the absorber. Moreover, the absorber exhibits unique absorption properties at resonant frequencies, that is, featuring single‐band or dual‐band operation by changing the surface resistance of the ITO patterns. In addition, the experimental demonstration and measurement results are in good agreement with the simulated results. Most importantly, the fabricated absorber exhibits an optical transparency above 70% over the entire visible waveband, thereby enabling a wide range of applications such as optically transparent THz absorbers and detectors.

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Broadband terahertz metamaterial absorber based on tantalum nitride

Cited by 73 publications

References 29 publications

Broadband Metamaterial Absorbers

Broadband Metamaterial Absorbers

Terahertz wave interaction with metallic nanostructures

Optically transparent and single-band metamaterial absorber based on indium-tin-oxide

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