نتایج جستجو برای: localized plasmon

تعداد نتایج: 118565  

Journal: :Optics letters 2014
Yen-Kai Chang Chih-Wei Chang

We show that employing localized surface plasmon resonators to probe environmental media will always lead to dissimilar optical sensitivities to permittivity and permeability. We find that while the permittivity sensitivities of diverse plasmonic structures display a geometry-independent universal scaling relation, the permeability sensitivities are highly dependent on the metals' geometries an...

Journal: :Nanoscale 2011
Lei Zhao Tian Ming Huanjun Chen Yao Liang Jianfang Wang

Both the excitation and emission processes of a fluorescent molecule positioned near a noble metal nanocrystal can interact strongly with the localized surface plasmon resonance of the metal nanocrystal. While the effects of this plasmon-fluorophore interaction on the intensity, polarization, and direction of the fluorescence emission have been intensively investigated, the plasmonic effect on ...

Journal: :International Journal of Antennas and Propagation 2012

Journal: :Optics express 2015
R Kekesi D Martín-Becerra D Meneses-Rodríguez F García-Pérez A Cebollada G Armelles

Perforated magnetoplasmonic Au/Co/Au multilayers support both localized and propagating surface plasmon resonances. The presence of holes produces an enhancement of the magnetic field modulation of the propagating surface plasmon wavevector with respect to the isostructural continuous film in the spectral region corresponding to the hole associated localized plasmon resonance. This is due to th...

Journal: :Nano letters 2011
S-F Shi Xiaodong Xu D C Ralph P L McEuen

We achieve direct electrical readout of the wavelength and polarization dependence of the plasmon resonance in individual gold nanogap antennas by positioning a graphene nanoconstriction within the gap as a localized photodetector. The polarization sensitivities can be as large as 99%, while the plasmon-induced photocurrent enhancement is 2-100. The plasmon peak frequency, polarization sensitiv...

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