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Core size and axial offset dependent extinction characteristics for silver nanotube and its application to directional sensing
Isro S.D.a, Iskandar A.A.a, Tjia M.-O.a
a Physics of Magnetism and Photonics Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, 40132, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2019 Optical Society of America.We report the results of a study using the classical Mie theory and available experimental data of Johnson and Christy [Phys. Rev. B 6, 4370 (1972)] on the extinction spectra resulting from a transverse electric (TE) polarized wave incident upon a silver nanotube with a dielectric core. It is shown that the spectral changes separately induced by varied core radius (Rin) and the axial offset (d) are consistent with those reported for a gold spherical nanoshell calculated by the celebrated plasmon hybridization model, including the core offset induced symmetry breaking effect. This is followed by an analysis of the combined influences of Rin and d on the extinction efficiency Qext , which results in the optimal geometrical parameters of Rin = 31.5 nm, d = 16 nm, and Ag minimum shell thickness δ = 2.5 nm for the maximum Qext at the resonance wavelength of λ = 756 nm. The different axial offsets are further shown to exhibit interesting variations of the angular distribution of the corresponding scattered wave intensity, which reveals significantly sensitive variations to different incident wave directions. The result has thus led to the following study for the exploration and demonstration of its potential development for sensing the direction of incoming TE polarized waves.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Directional sensing,Extinction characteristics,Extinction efficiency,Extinction spectra,Plasmon hybridization,Resonance wavelengths,Symmetry-breaking,Transverse electrics[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]Acknowledgment. This work was supported by Program Penelitian Dasar Unggulan Perguruan Tinggi DIKTI 2018 from the Indonesian Ministry of Research, Technology, and Higher Education under Contract No. 532m/I1.CO1/PL/2018.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1364/JOSAB.36.001637[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]