A Compact Nanoplasmonics Filter and Intersection Structure Based on Utilizing a Slot Cavity and a Fabry–Perot Resonator

Afshari-Bavil, Mehdi; Gao, Li; Sun, Xingming

doi:10.1007/s11468-012-9448-z

Cited by 26 publications

(13 citation statements)

References 18 publications

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“…Plasmonics that is based on exploiting coupling between light and collective electronic excitations within conducting materials known as surface plasmons (SP) paves a confident way beyond the diffraction limit for future optical integrated circuits. So far, a large diversity of plasmonic nanodevices has been theoretically proposed and experimentally demonstrated [1][2][3][4][5]. A key device is a SP generator that may efficiently convert the exciting field into surface plasmon polaritons (SPPs).…”

Section: Introductionmentioning

confidence: 99%

Active unidirectional propagation of surface plasmons at subwavelength slits

Afshari-Bavil¹,

Zhou²,

Deng³

2013

Opt. Express

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Highly efficient, active and compact, unidirectional surface plasmon (SP) propagator composed of double subwavelength slits; filled with organic electro-optic (EO) material is proposed and investigated. By selecting appropriate structure parameters, obtained by solving phase relations between slits, the relative phase of SP generated at the slit exit aperture can be tailored. Simulation results show under normal illumination and external voltage of 8.7 V, SP launching efficiency of 55% and unidirectional SP extinction ratio about 47dB at wavelength of 632.8 nm is achieved. The power consumption of the structure is on the order of 9 fJ/bit which meet the power consumption limitation for optical devices. Moreover, the structure is very compact with effective total length of 1.2 µm and thickness of 0.6 µm.

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Section: Introductionmentioning

confidence: 99%

Active unidirectional propagation of surface plasmons at subwavelength slits

Afshari-Bavil¹,

Zhou²,

Deng³

2013

Opt. Express

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“…The rectangular resonator acts as a Fabry-Perot (F-P) resonator, only resonant wavelength can be coupled into this resonator from the input waveguide, and released to the output waveguide. The resonant condition is as follows [43]:…”

Section: Resultsmentioning

confidence: 99%

Chipscale plasmonic modulators and switches based on metal–insulator–metal waveguides with Ge2Sb2Te5

et al. 2019

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We introduce phase-change material Ge2Sb2Te5 (GST) into metal-insulator-metal (MIM) waveguide systems to realize chipscale plasmonic modulators and switches in the telecommunication band. Benefitting from the high contrast of optical properties between amorphous and crystalline GST, the three proposed structures can act as reconfigurable and non-volatile modulators and switches with excellent modulation depth 14 dB and fast response time in nanosecond, meanwhile possessing small footprints, simple frameworks and easy fabrication. This work provides new solutions to design active devices in MIM waveguide systems, and can find potential applications in more compact all-optical circuits for information processing and storage. Keywords: metal-insulator-metal, phase-change material, plasmonic modulator, plasmoninduced transpareny 1. Introduction Facing the increasing demand for information quantity and transmission rate, today's electronic integrated devices will be unable to afford roles in future chipscale systems due to the fundamental limits [1]. As a promising solution, photonic integrated devices can break the blocks by using light as the carrier of information. To construct basic photonic circuits, dielectric waveguides (such as silicon waveguide) have been widely studied for decades [2,3]. However, the scale of a dielectric waveguide cannot go smaller than the working wavelength due to the diffraction limit, which restricts the integration and compactness of photonic integrated chips [1]. Recently, surface plasmon polariton (SPPs), which are the surface electromagnetic waves supported at the interface between metal and dielectric, have attracted more attention due to the capacity to break the diffraction limit [1]. SPPs also introduce plasmonic waveguides, which can deliver light in sub-wavelength scale [4,5]. Especially, plasmonic metal-insulator-metal (MIM) waveguides possess good confinement of light, low bending loss, easy fabrication and acceptable propagation length, therefore can be potential platforms for future more compact all-optical integrated circuits [6][7][8][9]. As the promising next-generation on-chip photonic system, MIM system has supported various chipscale passive devices such as filters [10,11], demultiplexers [12,13], sensors [14,15] and spacers [16,17]. However, active devices are also required in such system. Therefore, optical materials with tunable properties have been utilized to realize dynamically tunable functionalities. For example, nonlinear materials have been used to realize all-optical tunable filters, logic gates and diodes [18][19][20]. Lasers, switches and slow light enhancement can be

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“…This target can be achieved by exploiting surface plasmon polaritons (SPPs), which are propagating transverse magnetic waves at the interface of a dielectric-metallic layer [1], [2]. To fully develop plasmonic chips, various phenomena associated with excitation, propagation, and scattering of SPPs should carefully be addressed [3]- [6]. Considering mismatch in light and SPPs wave vectors, normal illumination cannot excite SPPs, unless gratings, slits, holes, or any symmetry broken configurations are implemented [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

Afshari-Bavil

Dong

et al. 2019

IEEE Photonics J.

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We present the realization of a high-efficiency, compact, and thermally tunable unidirectional launcher of surface plasmon polaritons (SPPs) in a double-slit structure filled with phase change materials (PCMs). PCMs such as VO 2 provide a feasible way for tailoring optical properties, particularly refractive index as a function of heat. By introducing a narrow hybrid dielectric layer beneath the slits, SPPs couple efficiently into waveguide mode and propagate within the slot waveguide with considerably high intensity. Our simulation results revealed up to 80% coupling efficiency into the slot waveguide with extinction ratio of 1:800 between the left and the right slots can be achieved at telecommunication wavelength for normally incident P-polarized light. By heating the coupler above the VO 2 phase transition temperature, the coupling and consequently the crosstalk approaches zero. Propagation length and other properties of the structure are characterized to confirm the feasibility of the coupler. This approach of unidirectional coupling into slot waveguides may lead to the development of integrated plasmonic circuits and on-chip applications.

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A Compact Nanoplasmonics Filter and Intersection Structure Based on Utilizing a Slot Cavity and a Fabry–Perot Resonator

Cited by 26 publications

References 18 publications

Active unidirectional propagation of surface plasmons at subwavelength slits

Active unidirectional propagation of surface plasmons at subwavelength slits

Chipscale plasmonic modulators and switches based on metal–insulator–metal waveguides with Ge2Sb2Te5

Thermally Controllable High-Efficiency Unidirectional Coupling in a Double-Slit Structure Filled With Phase Change Material

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