Fabrication and laser-assisted modification of the Ag particles ensembles supporting quadrupole plasmon oscillations

Toropov, N. A.; Gladskikh, I. A.; Parfenov, Peter S.; Vartanyan, T. A.

doi:10.1007/s11082-017-0996-5

Cited by 16 publications

(15 citation statements)

References 19 publications

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“…The position of the plasmon band dependence on the amount of deposited material was studied in the case of quartz substrate in ref. 44 and in the case of GaAs substrate in 41 . Based on the vast experience in silver nanoparticles fabrication and investigation of their plasmonic properties 41 – 44 , 48 we chose the particular set of control parameters that led to the successful approximation of the optimal film morphology suggested by the numerical simulations.…”

Section: Methodsmentioning

confidence: 99%

“… 44 and in the case of GaAs substrate in 41 . Based on the vast experience in silver nanoparticles fabrication and investigation of their plasmonic properties 41 – 44 , 48 we chose the particular set of control parameters that led to the successful approximation of the optimal film morphology suggested by the numerical simulations. The equivalent thickness of the silver film as measured in situ by the quartz crystal microbalance was equivalent to 20 nm, while the deposition rate was set to 2 nm/min.…”

Section: Methodsmentioning

confidence: 99%

“…Additional thermal treatment of the obtained film may be employed for further adjustment of the film morphology. Based on our previous experience 41 – 44 , we chose the equivalent thickness of the initially deposited silver film to be 20 nm and the deposition rate 2 nm/min. The temperature of the substrate during the deposition process was kept at 250 °C.…”

Section: Hybrid Pca Design and Fabricationmentioning

confidence: 99%

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Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

Lepeshov

Gorodetsky

Krasnok

et al. 2018

Sci Rep

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Advanced nanophotonics penetrates into other areas of science and technology, ranging from applied physics to biology, which results in many fascinating cross-disciplinary applications. It has been recently demonstrated that suitably engineered light-matter interactions at the nanoscale can overcome the limitations of today’s terahertz (THz) photoconductive antennas, making them one step closer to many practical implications. Here, we push forward this concept by comprehensive numerical optimization and experimental investigation of a log-periodic THz photoconductive antenna coupled to a silver nanoantenna array. We shed light on the operation principles of the resulting hybrid THz antenna, providing an approach to boost its performance. By tailoring the size of silver nanoantennas and their arrangement, we obtain an enhancement of optical-to-THz conversion efficiency 2-fold larger compared with previously reported results for similar structures, and the strongest enhancement is around 1 THz, a frequency range barely achievable by other compact THz sources. We also propose a cost-effective fabrication procedure to realize such hybrid THz antennas with optimized plasmonic nanostructures via thermal dewetting process, which does not require any post processing and makes the proposed solution very attractive for applications.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Hybrid Pca Design and Fabricationmentioning

confidence: 99%

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Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

Lepeshov

Gorodetsky

Krasnok

et al. 2018

Sci Rep

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“…Отметим, что дипольные плазмонные осцилляции в частицах серебра и золота возбуждаются при взаимодействии со светом, половина длины волны которого больше размера частиц. Если длина волны становится сопоставимой с размером частицы, то могут наблюдаться квадрупольные осцилляции [1,13], а также, потенциально, осцилляции более высоких порядков.…”

Section: теоретические предпосылки материалы и методыunclassified

Химически Синтезированные Частицы Золота И Серебра, Поглощающие В Ближней ИК Области Спектра

Разумова¹,

Торопов²,

Вартанян³

2018

Журнал Технической Физики

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Предложены методики создания частиц золота в виде сфер субмикронного размера и частиц серебра в виде стержней с поперечными размерами ∼ 10 nm и аспектным отношением 1 : 10. Рассмотрены факторы, определяющие частоту плазмонных резонансов, подобраны реагенты и определены их соотношения для получения вытянутых серебряных частиц. Определена оптимальная концентрация поверхностно-активного вещества для создания наиболее вытянутых частиц серебра. Получено смещение плазмонного поглощения в ближнюю ИК область спектра.

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“…Это позволяет уменьшать разброс частиц по размерам и более точно подстраивать их оптические свойства. К таким методам можно отнести температурную и лазерную обработку [8,9]. Отличительной особенностью лазерной обработки является селективность воздействия лазерного излучения на ансамбли металлических наночастиц с широким распределением по форме и размеру.…”

Section: Introductionunclassified

Абляция И Фрагментация Золотых Наночастиц Под Действием Интенсивного Лазерного Облучения В Спектральных Областях Дипольного И Квадрупольного Плазмонных Резонансов

Гладских¹,

Гладских²,

Баранов³

et al. 2020

Журнал Технической Физики

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Methods of vacuum deposition and subsequent heat treatment of thin gold films are proposed, which allow one to obtain both extremely small gold nanoparticles with spectrally narrow dipole plasmon resonances and larger nanoparticles that support quadrupole vibrations. The effect of high-power laser radiation on both small and large metal nanoparticles in the regions of dipole and quadrupole resonances, respectively, was experimentally studied. Powerful laser irradiation leads to the ablation of small particles, while large particles decay into smaller particles during irradiation.

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Fabrication and laser-assisted modification of the Ag particles ensembles supporting quadrupole plasmon oscillations

Cited by 16 publications

References 19 publications

Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

Boosting Terahertz Photoconductive Antenna Performance with Optimised Plasmonic Nanostructures

Химически Синтезированные Частицы Золота И Серебра, Поглощающие В Ближней ИК Области Спектра

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