Nanoplasmonic couplers and splitters

Wahsheh, Rami A.; Lu, Zhaolin; Abushagur, Mustafa A. G.

doi:10.1364/oe.17.019033

Cited by 109 publications

(47 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Light is propagating along an Si slab waveguide with a width w d =300 nm. It is coupled into the MIM waveguide by an air gap coupler with w c =292 nm and l c =28 nm [33]. The coupling efficiency is around 90%.…”

mentioning

confidence: 99%

Plasmonic Tamm states: dual enhancement of light inside the plasmonic waveguide

et al. 2014

View full text Add to dashboard Cite

A type of Tamm states inside metal-insulator-metal (MIM) waveguides is proposed. An impedance based transfer matrix method is adopted to study and optimize it. With the participation of the plasmonic Tamm states, fields could be enhanced twice: the first is due to the coupling between a normal waveguide and a nanoscaled plasmonic waveguide and the second is due to the strong localization and field enhancement of Tamm states. As shown in our 2D coupling configuration, |E| 2 is enhanced up to 1050 times when 1550 nm light is coupled from an 300 nm Si slab waveguide into an 40 nm MIM waveguide. Optical Tamm states (OTSs, also known as Tamm plasmons), was recently discovered at the interface between a metal film and an 1D photonic crystal (PC) [21,22]. Unlike the only TM-polarized SPPs, OTSs can be excited directly by normal incidence for both TM and TE-polarized waves. The light frequency lies in the band gap of the PC. Fields are confined and amplified at the metal/PC interface due to the interference of light reflected from both sides. Owing to the strong field enhancement, applications such as lasers [23,24], all-optical switches [25], solar cells [26], Faraday rotation [27,28] and electromagnetically induced transparency (EIT) [29] have been proposed.In this letter, we introduce and demonstrate a type of Tamm states in plasmonic metal-insulator-metal (MIM) waveguides. In analogy with OTSs in an optical system, such states exist in a plasmonic system, as which we call plasmonic Tamm states (PTSs). We form Bragg reflectors (BR) by periodically change the dielectric materials in MIM [30]. Only if the phase matching condition r left r right = 1 is fulfilled, PTSs can be generated in accompany with fields enhancement at the interface between the MIM BR and the MIM end [21]. Hence, fields can be enlarged twice during the focusing process: the first enhancement is due to the coupling between a normal dielectric waveguide and a nanoscaled MIM waveguide and the second enhancement is due to the strong localization and amplification of PTSs. Fig. 1. Sketch of the plasmonic Tamm states generation configuration. In order to fulfill the phase matching condition, ε 2 should be larger than ε 1 .The scheme of the PTSs generation configuration is illustrated in Fig. 1. SPPs are excited at the left side. The operation wavelength is 1550 nm. The dielectric core has a width of w = 40 nm. In this regime, the odd TM mode (E x is odd, E y and H z are even) is the only mode of this MIM structure with a dispersion relation [4]where ε m and ε d are the dielectric constants of the metal and the dielectric, respectively. k m and k d denote the re-1 arXiv:1401.5230v1 [physics.optics]

show abstract

mentioning

confidence: 99%

Plasmonic Tamm states: dual enhancement of light inside the plasmonic waveguide

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Among various types of plasmonic waveguides, the metal-dielectric-metal (MDM) waveguide is considered to be a key element in the fields of waveguide couplers [34,35], sub-wavelength scale light confinement [36,37], wavelength filters [38] and integrated optical devices [39,40]. The remarkable advantages of the MDM waveguide, including the strong confinement of optical field in nano-scale gaps, the high sensitivity of its transmission characteristics to the waveguide structures, and the facility of its fabrication, attracted a great deal of effort to be devoted to develop the MDM based nano-plasmonic devices.…”

Section: Mdm Nano-waveguidesmentioning

confidence: 99%

Numerical Simulations of Surface Plasmons Super-Resolution Focusing and Nano-Waveguiding

Gao¹

2012

Plasmonics - Principles and Applications

View full text Add to dashboard Cite

“…Surface plasmon polaritons (SPPs) have been considered as one of the most confident ways to overcome the diffraction limits of optical waves [1], and thus have attracted lots of attention in various areas, such as wavelength waveguides [2], combiners or couplers [3,4], semiconductor device [5][6][7], and so on. Usually, subwavelength slits or gratings in a metal film are employed to reduce the momentum mismatch between the SPP modes and the p-polarized light, so that SPPs will propagate along both directions on the metal/insulator interfaces for all those symmetrical structures, such as rectangle grooves, slot cavities, and so on [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%