Nanoantenna Structure with Mid-Infrared Plasmonic Niobium-Doped Titanium Oxide

Ngo, Hai Dang; Chen, Kai; Handegård, Ørjan Sele; Doan, Anh Tung; Ngo, Thien Duc; Dao, Thang Duy; Ikeda, Naoki; Ohi, Akihiko; Nabatame, Toshihide; Nagao, Tadaaki

doi:10.3390/mi11010023

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…It is worth noting that the proposed process is generic and might be very efficient for the production of nanostructures of a wide variety of alternative nonmetallic conductors, which are usually grown by sputter deposition, such as molybdenum nitride (MoN), tantalum nitride (TaN), ,, niobium nitride (NbN), In-doped tin oxide (ITO), ,, aluminum- or gallium-doped zinc oxide (AZO, GZO), ,,, niobium-doped titanium oxide (NTO), partly reduced molybdenum oxides MoO x ( x < 3), , and vanadium dioxide (VO 2 ), which exhibits a metal–insulator transition. , All these conductors have been proposed as alternative plasmonic materials, whose plasmonic activity spans the far-ultraviolet to medium-infrared range. ,,,,,− …”

Section: Resultsmentioning

confidence: 99%

Self-Assembled Dichroic Plasmonic Nitride Nanostructures with Broken Centrosymmetry for Second-Harmonic Generation

Babonneau

Camelio

Abadias

et al. 2021

ACS Appl. Nano Mater.

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TiN and ZrN are emerging as important alternative plasmonic materials. In addition to their well-known assets, they can incorporate point defects that break the centrosymmetry of their cubic crystal structure, making them promising candidates as non-linear optical materials and especially for second harmonic generation (SHG). Their refractory character and chemical stability were obstacles for the bottom-up fabrication of TiN and ZrN nanostructures so far. In this work, it is shown that highly directional dichroic nanostructures of TiN and ZrN may be indeed grown by self-assembly using glancing angle deposition on periodic rippled dielectric surfaces. The produced nitride nanostructures exhibit point defects and exceptional photothermal durability. These nanostructures exhibit strong SHG response when probed by a near-infrared laser. It is shown that SHG is strongly associated with the near-field enhancement due to the localized surface plasmon resonance of the nanostructures. Given that such nanostructures can endure extremely high electric fields, they are expected to be able to emit massive SHG signals and be applied in laser technology as optical components such as polarizers and SHG emitters.

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Section: Resultsmentioning

confidence: 99%

Self-Assembled Dichroic Plasmonic Nitride Nanostructures with Broken Centrosymmetry for Second-Harmonic Generation

Babonneau

Camelio

Abadias

et al. 2021

ACS Appl. Nano Mater.

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“…The operating principle is the same as that of the Seebeck effect, wherein we excite the nanoantenna designs with various laser wavelengths (650 nm, 940 nm, and 1550 nm) that detect voltages produced by the properties of intersecting materials. Compared to the state of the art, to our knowledge, this is the first time that peak percentage voltage hike detection is attained when utilizing infrared energy [26][27][28][29].…”

Section: Introductionmentioning

confidence: 97%

Thermoelectric Sensor Coupled Yagi–Uda Nanoantenna for Infrared Detection

et al. 2021

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We present an experimental demonstration of a thermoelectric sensor coupled with a nanoantenna as an alternative option for detecting infrared energy. Two nanoantenna design (single element and an array) variations based on Yagi-Uda technology and one separate nano-thermoelectric junction array were fabricated and tested. The nanoantennas were tuned to operate and respond at a center wavelength of 1550 nm (193.5 THz) optical C-band window, but they also exhibited a resonance response when excited by lasers of various wavelengths (650 nm and 940 nm). The radiation-induced electric currents in the nanoantennas, coupled with a nano-thermoelectric sensor, produced a potential difference as per the Seebeck effect. With respect to the uniform thermal measurements of the reference nanoantenna, the experiments confirmed the detection properties of the proposed nanoantennas; the single element detected a peak percentage voltage hike of 28%, whereas the array detected a peak percentage voltage hike of 80% at the center wavelength. Compared to state-of-the-art thermoelectric designs, this was the first time that such peak percentage voltages were experimentally reported following a planar design based on the Seebeck principle.

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“…Ngo et al reported the synthesis and demonstration of niobium-doped titanium dioxide for the application in plasmonic antenna and surface-enhanced infrared absorption [ 6 ]. The nanopatterns prepared by electron beam lithography, plasma etching/ashing processes showed well-defined antenna resonance as well as clear polarization/size dependence, which confirms that these materials are suitable for infrared plasmonic applications.…”

mentioning

confidence: 99%