Electrical Conductivity and Optical Properties of Nanoscale Titanium Films on Sapphire for Localized Plasmon Resonance-Based Sensors

Korotkova, Klavdiya; Bainov, Dashi D.; Smirnov, S. V.; Yunusov, Igor; Zhidik, Yury

doi:10.3390/coatings10121165

Cited by 7 publications

(5 citation statements)

References 18 publications

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“…The results of the experiments are shown in Figure 7. Analysis of the reflection spectra of optical radiation from the studied prism/ITO film/analyte system showed the presence of minima related to the SPR excitation [18]. The Analysis of the reflection spectra of optical radiation from the studied prism/ITO film/analyte system showed the presence of minima related to the SPR excitation [18].…”

Section: Study Of Optical Mode Excitation and Plasmon Resonancementioning

confidence: 85%

“…The main plasmonic materials used in modern SPR sensors are noble metals, which have minimal losses and high chemical stability. SPR sensors operate by generating and registering surface electromagnetic waves after the light hits the conductor-insulator interface [18]. The contacting media (the conducting film and the layer of the analyzed substance) must have permittivities of opposite signs.…”

Section: Methodsmentioning

confidence: 99%

“…Analysis of the reflection spectra of optical radiation from the studied prism/ITO film/analyte system showed the presence of minima related to the SPR excitation [18]. The Analysis of the reflection spectra of optical radiation from the studied prism/ITO film/analyte system showed the presence of minima related to the SPR excitation [18]. The large resonance width of the spectra is apparently due to the presence of an amorphous phase in the studied ITO films, as a direct consequence of incomplete crystallization.…”

Section: Study Of Optical Mode Excitation and Plasmon Resonancementioning

confidence: 97%

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Nanoscale ITO Films for Plasmon Resonance-Based Optical Sensors

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The developing field of plasmonics has led to the possibility of creating a new type of high-speed, highly sensitive optical sensors for the analysis of chemical and biological media. The functional conducting layers of surface plasmon resonance (SPR) optical sensors are almost always nanoscale thin films of noble metals. To enhance the plasmon resonance, nanostructured films of transparent conductive oxides are introduced into the optical sensors. However, such modified optical sensors operate in the infrared region of the spectrum. In this work, we demonstrate that the use of indium tin oxide (ITO) films with a high concentration of charge carriers makes it possible to shift the surface plasmon resonance into the visible radiation region. The work presents the results of the development of magnetron deposition technology for ITO thin films, with optimal parameters for optical sensors based on surface plasmon resonance operating in the visible range of the spectrum. Their optical and electrical characteristics are investigated. Excitation of the surface and volume plasmon resonance at the dielectric-ITO film interface, using the Kretschman configuration, is studied. It is shown that SPR is excited in the investigated ITO films with a concentration of free charge carriers of the order of 1021–1022 cm−3, when irradiated with a beam of light with TM polarization in the wavelength range of 350–950 nm. At the same time, the addition of various analytes to the surface of an ITO film changes the excitation wavelength of the SPR.

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Section: Study Of Optical Mode Excitation and Plasmon Resonancementioning

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Study Of Optical Mode Excitation and Plasmon Resonancementioning

confidence: 97%

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Nanoscale ITO Films for Plasmon Resonance-Based Optical Sensors

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“…Они имеют химическую стойкость, достаточно высокий показатель преломления в видимом диапазоне, обладают фотокаталитическими и антикоррозионными свойствами. Такое сочетание свойств пленок оксида титана способствует их использованию в устройствах оптики, интегральной фотоники, газочувствительных сенсорах, а также применению в устройствах очистки воздуха и воды от вредных органических соединений [1][2][3][4][5]. Целью настоящей работы является исследование влияния технологического режима нанесения пленок оксида титана методом вакуумно-дугового осаждения на их оптические и фотокаталитические свойства.…”

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Исследование Оптических И Фотокаталитических Свойств Пленок Оксида Титана Разной Степени Окисления

Ручкин¹,

Жидик²,

Юрьев³

et al. 2022

Письма В Журнал Технической Физики

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The results of studies of the optical and photocatalytic properties of titanium oxide films deposited by vacuum-arc evaporation in an oxygen-containing atmosphere are presented. It was experimentally shown that films of different degrees of oxidation are formed during deposition, depending on the amount of oxygen flow entering the working chamber. The results of studies of the obtained films showed that the films obtained in a transitional mode between the deposition of metallic Ti films and dielectric TiO2 films have the maximum photocatalytic activity. This deposition mode is observed at the oxygen flow into the working chamber from 9 to 12 cm3/min.

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“…Titanium oxide thin films have a number of unique properties: chemical resistance, a sufficiently high refractive index in the visible range, the have photo-catalytic and anticorrosive properties This combination of properties have drawn a great application prospect for their use in optical devices, integrated photonics, gas-sensitive sensors as well as their use in air and water purification devices from harmful organic compounds [1][2][3][4][5]. The purpose of this article is to study the effect of the technological regime of titanium oxide thin films deposition by the means of cathodic arc deposition on their optical and photocatalytic properties.…”

mentioning

confidence: 99%