Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Yu, Zongfu; Veronis, Georgios; Brongersma, Mark L.; Fan, Shanhui

doi:10.1117/12.764052

Cited by 30 publications

(57 citation statements)

References 9 publications

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“…By incorporating appropriate gain into the waveguide to compensate the metal loss, the zero group velocity is obtained and SPP waves could be trapped in such a tapered MIM waveguide. The detailed analysis can be seen in [106]. As shown in Figure 10(b), when the loss is considered, the forward and backward modes diverge and split into two different parts, the group velocity for either forward or backward no longer declines to zero.…”

Section: Slow Light In Mim Plasmonic Waveguidesmentioning

confidence: 99%

“…When the core thickness is larger than the critical thickness, the plasmonic waveguide only supports the decay mode and SPP wave cannot propagate further. By employing gain material such as semiconductors, the loss effect can be perfectly compensated [106]. As shown in Figure 10(c), the gain compensates the metal loss and forces the forward and backward modes to combine together.…”

Section: Slow Light In Mim Plasmonic Waveguidesmentioning

confidence: 99%

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Manipulation of light in MIM plasmonic waveguide systems

2013

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Plasmonic waveguides that allow deeply subwavelength confinement of light provide an effective platform for the design of ultracompact photonic devices. As an important plasmonic waveguide, metal-insulator-metal (MIM) structure supports the propagation of light in the nanoscale regime at the visible and near-infrared ranges. Here, we focus on our work in MIM plasmonic waveguide devices for manipulating light, and review some of the recent development of this topic. We introduce MIM plasmonic wavelength filtering and demultiplexing devices, and present the electromagnetic induced transparency (EIT)-like and Fano resonance effects in MIM waveguide systems. The slow-light and rainbow trapping effects are demonstrated theoretically. These results pave a way toward dynamic control of the special and useful optical responses, which actualize some new plasmonic waveguide-integrated devices such as nanoscale filters, demultiplexers, sensors, slow light waveguides, and buffers. for SPP propagation. The unique features of MIM waveguides can be utilized to realize nanoscale photonic functionality and circuitry [11]. In this review, we mainly focus on our research about the manipulating properties in the MIM plasmonic waveguides. Due to the limit of this small topic, an amount of research in the plasmonic field will be omitted, for example, the important applications of SPPs for the enhancement of nonlinear effects [12], beam focusing [13,14], polarization analyzer [15], optical amplifier [16], and so on. We review some recent development of MIM plasmonic waveguide devices. Especially, plasmonic wavelength filtering and demultiplexing have been introduced. The analogue of electromagnetic induced transparency (EIT) and Fano resonances and their applications are presented in the MIM plasmonic waveguide systems. The slow light and rainbow trapping in the MIM waveguides are demonstrated. These results may provide some useful information for attracting researchers' interests in further investigation of the control of light and its applications in the plasmonic waveguides.

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Section: Slow Light In Mim Plasmonic Waveguidesmentioning

confidence: 99%

Section: Slow Light In Mim Plasmonic Waveguidesmentioning

confidence: 99%

Manipulation of light in MIM plasmonic waveguide systems

2013

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“…The use of gain media in optical waveguides can lead to active optical devices and to material loss compensation [79][80][81][82][83]. Hahn et al investigated the unidirectional reflectionlessness at EPs in PT-symmetric gratings based on active dielectric-loaded long-range SPP (DL-LRSPP) waveguides [84].…”

Section: Unidirectional Reflectionless Propagation In Pt-symmetric Symentioning

confidence: 99%

Unidirectional reflectionless light propagation at exceptional points

et al. 2017

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Abstract:In this paper, we provide a comprehensive review of unidirectional reflectionless light propagation in photonic devices at exceptional points (EPs). EPs, which are branch point singularities of the spectrum, associated with the coalescence of both eigenvalues and corresponding eigenstates, lead to interesting phenomena, such as level repulsion and crossing, bifurcation, chaos, and phase transitions in open quantum systems described by non-Hermitian Hamiltonians. Recently, it was shown that judiciously designed photonic synthetic matters could mimic the complex non-Hermitian Hamiltonians in quantum mechanics and realize unidirectional reflection at optical EPs. Unidirectional reflectionlessness is of great interest for optical invisibility. Achieving unidirectional reflectionless light propagation could also be potentially important for developing optical devices, such as optical network analyzers. Here, we discuss unidirectional reflectionlessness at EPs in both parity-time (PT)-symmetric and non-PT-symmetric optical systems. We also provide an outlook on possible future directions in this field.

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“…These features make MIM highly attractive for high sensitivity spectroscopy applications and biosensing 5,6 , nonlinear optical phenomena 7,8 , waveguiding [9][10][11][12] , and on-chip signal routing, modulation and processing [13][14][15] . The disadvantages of MIM are (i) high attenuation per unit length due to inherent losses of the metal claddings at optical and near-infrared bands and (ii) size mismatch with micron-size optical fibers that bring light from optical sources.…”

Section: Introductionmentioning

confidence: 99%

Nanoantenna couplers for metal-insulator-metal waveguide interconnects

Onbaşlı

Okyay

2010

SPIE Proceedings

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State-of-the-art copper interconnects suffer from increasing spatial power dissipation due to chip downscaling and RC delays reducing operation bandwidth. Wide bandwidth, minimized Ohmic loss, deep sub-wavelength confinement and high integration density are key features that make metal-insulator-metal waveguides (MIM) utilizing plasmonic modes attractive for applications in on-chip optical signal processing. Size-mismatch between two fundamental components (micron-size fibers and a few hundred nanometers wide waveguides) demands compact coupling methods for implementation of large scale on-chip optoelectronic device integration. Existing solutions use waveguide tapering, which requires more than 4λ-long taper distances. We demonstrate that nanoantennas can be integrated with MIM for enhancing coupling into MIM plasmonic modes. Two-dimensional finite-difference time domain simulations of antennawaveguide structures for TE and TM incident plane waves ranging from λ = 1300 to 1600 nm were done. The same MIM (100-nm-wide Ag/100-nm-wide SiO2/100-nm-wide Ag) was used for each case, while antenna dimensions were systematically varied. For nanoantennas disconnected from the MIM; field is strongly confined inside MIM-antenna gap region due to Fabry-Perot resonances. Major fraction of incident energy was not transferred into plasmonic modes. When the nanoantennas are connected to the MIM, stronger coupling is observed and E-field intensity at outer end of core is enhanced more than 70 times.

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Gain-induced switching in metal-dielectric-metal plasmonic waveguides

Cited by 30 publications

References 9 publications

Manipulation of light in MIM plasmonic waveguide systems

Manipulation of light in MIM plasmonic waveguide systems

Unidirectional reflectionless light propagation at exceptional points

Nanoantenna couplers for metal-insulator-metal waveguide interconnects

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