Routing properties of the T-structure based on Au/SiO2 nanorings in optical nanophotonic devices

• Autorzy: Ahmadivand A.
• Języki publikacji: EN

Abstrakty

EN

In the present paper, we have utilized Au nanoring arrays in an SiO2 host to provide a T-structure for the purpose of routing and switching optical energy in optical integrated devices to operate at optical communication band (? ? 1550 nm). To employ this router at spectral region considered, localized surface plasmons resonance (LSPR) must be red-shifted around 1550 nm. This T-shaped router includes Au nanorings with a 175 nm inner diameter, a 35 nm thickness and a 35 nm height, and the intercenter distance between two nanorings is 330 nm. To demonstrate the routing properties, we utilized the finite-difference time-domain (FDTD) method. It is shown that the non-straight chain can transport and route the optical energy with certain velocity of light and transmission coefficient. In addition, the percentage of transmitted or power ratio for this structure has been calculated as almost 90%. The optical energy transport can take place at group velocity of approximately 25% of the velocity of light (0.25c0, where c0 is the velocity of light in the vacuum). The router based on nanoring chains shows better performance in switching and transporting the optical energy in comparison to other nanoparticles (nanospheres, nanodisks and nanorods).

Słowa kluczowe

EN

nanoring; optical communication band; finite-difference time-domain; FDTD; method; localized surface plasmons resonance (LSPR); routing and switching

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2012
• Tom: Vol. 42, nr 3
• Strony: 659--666
• Opis fizyczny: Bibliogr. 12 poz., rys., tab.

Twórcy

autor

Ahmadivand A.

• Department of Electrical Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran,

Bibliografia

• [1] KREIBIG U., VOLLMER M., Optical Properties of Metal Clusters, Springer-Verlag, Berlin, 1995.
• [2] RAETHER H., Surface Plasmons on Smooth and Rough Surfaces and on Gratings, 1st Ed., Springer--Verlag, Berlin, 1988.
• [3] MAIER S.A., Plasmonics: Fundamentals and Applications, Springer, 2007.
• [4] MAIER S.A., BRONGERSMA M.L., KIK P.G., MELTZER S., REQUICHA A.A.G., ATWATER H.A.,Plasmonics – A route to nanoscale optical devices, Advanced Materials 13(19), 2001, pp. 1501–1505.
• [5] KYUNG-YOUNG JUNG, TEIXEIRA F.L., REANO R.M., Au/SiO2 nanoring plasmon waveguides at optical communication band, IEEE Journal of Lightwave Technology 25(9), 2007, pp. 2757–2764.
• [6] RAYFORD C.E., SCHATZ G., SHUFORD K., Optical properties of gold nanospheres, Nanoscape:The Journal for Undergraduate Research in Nanoscience 2(1), 2005, pp. 27–33.
• [7] TAFLOVE A., HAGNESS S.C., Computational Electrodynamics: The Finite-Difference Time-Domain Method, 2nd Ed., Norwood, 2000.
• [8] SALEH B.E.A., TEICH M.C., Fundamentals of Photonics, Wiley and Sons, New York, 1991.
• [9] MAIER S.A., KIK P.G., ATWATER H.A., Optical pulse propagation in metal nanoparticle chain waveguides, Physical Review B 67(20), 2003, article 205402.
• [10] JACKSON J.D., Classical Electrodynamics, 3rd Ed., Wiley and Sons, 1998.
• [11] BOHREN C.F., HUFFMAN D.R., Absorption and Scattering of Light by Small Particles, Wiley and Sons, New York, 1983.
• [12] BRONGERSMA M.L., HARTMAN J.W., ATWATER H.A., Electromagnetic energy transfer and switching in nanoparticle chain arrays below the diffraction limit, Physical Review B 62(24), 2000, pp. R16356–R16359.