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Eliptyczna nanoantena dipolowa z eliptycznym gniazdem dla zwiększenia wydajności plazmonicznej
Języki publikacji
Abstrakty
The increasing interests in plasmonic nanoantennas focus on changing the resonance wavelength or field localization by changing the shape and size of the nanoantenna. A hollow elliptical dipole nanoantenna (HEDNA) is proposed by adding a slot in the two elliptical arms of the dipole nanoantenna. The plasmonic resonance wavelength and the localized field in the gap zone are increased. Moreover, the slot can be designed to enhance the overall absorption and reduce scattering. The simulations revealed that the antenna with the slot HEDNA scatters just 43% of the incident power and absorbs the remaining 57%, while the parent solid dipole scatters 90% of coupled power and absorbs the residual 10%. This represents switching from a scatterer to an absorber nanoantenna. Moreover, the achieved field enhancement in the gap region of the HEDA is more than three folds that without a slot. The proposed structure is easily applicable in sensing, thermoplasmonics, solar cells, and energy harvesting.
Rosnące zainteresowanie nanoantenami plazmonicznymi koncentruje się na zmianie długości fali rezonansu lub lokalizacji pola poprzez zmianę kształtu i rozmiaru nanoanteny. Zaproponowano wydrążoną eliptyczną nanoantenę dipolową (HEDNA) poprzez dodanie szczeliny w dwóch eliptycznych ramionach nanoanteny dipolowej. Zwiększa się długość fali rezonansu plazmonowego i zlokalizowane pole w strefie szczeliny. Ponadto szczelinę można zaprojektować tak, aby zwiększyć ogólną absorpcję i zmniejszyć rozpraszanie. Symulacje wykazały, że antena ze szczeliną HEDNA rozprasza zaledwie 43% padającej mocy i pochłania pozostałe 57%, podczas gdy macierzysty stały dipol rozprasza 90% sprzężonej mocy i pochłania pozostałe 10%. Oznacza to przejście z nanoanteny rozpraszającej na nanoantenę pochłaniającą. Co więcej, osiągnięte wzmocnienie pola w obszarze szczeliny HEDA jest ponad trzykrotnie większe niż bez szczeliny. Proponowana struktura jest łatwa do zastosowania w wykrywaniu, termoplazmonice, ogniwach słonecznych i pozyskiwaniu energii.
Wydawca
Czasopismo
Rocznik
Tom
Strony
160--164
Opis fizyczny
Bibliogr. 29 poz.,rys.
Twórcy
autor
- University of Mosul
autor
- Ninevah University
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikator YADDA
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