Integrated amorphous silicon-aluminum long-range surface plasmon polariton (LR-SPP) waveguides

Sturlesi, Boaz; Grajower, Meir; Mazurski, Noa; Levy, Uriel

doi:10.1063/1.5013662

Cited by 18 publications

(24 citation statements)

References 39 publications

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“…The LR-DLSPP waveguide's mode supporting a TM mode has a similar profile to the photonic TM mode fabricated based on the same material. The overlap integral between them shows up to 98 % coupling efficiency with very good tolerance to the offset of the metal stripe supporting the LR-DLSPP mode [27,28]. The LR-DLSPP configuration therefore demonstrates great potential for creation of photoconductive photodetectors based on germanium and other absorbing materials where good mode confinement and low absorption losses in metal are essential.…”

Section: Figure Of Merit Of Lr-dlspp Waveguidesmentioning

confidence: 75%

“…In comparison, a gap SPP (MIM) can support a very high confined SPP mode but absorption losses from the metal arise, limiting the propagation distance to tens of the corresponding mode's wavelengths. The LR-DLSPP waveguide is currently the only plasmonic waveguide configuration that allows to achieve a good mode field confinement and high propagation length [25][26][27][28]. It has the highest evaluated figure of merit (FoM) among all other plasmonic waveguides, taking into account mode size, wavelength, and propagation length (Table 1) [7,26]:…”

Section: Figure Of Merit Of Lr-dlspp Waveguidesmentioning

confidence: 99%

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High-bandwidth and high-responsivity waveguide-integrated plasmonic germanium photodetector

Gosciniak

Rasras

2019

J. Opt. Soc. Am. B

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Here we propose a waveguide-integrated germanium plasmonic photodetector that is based on a long-range dielectric-loaded surface plasmon polariton waveguide configuration. As this configuration ensures a long propagation distance, i.e., small absorption into metal, and a good mode field confinement, i.e., high interaction of the electric field with a germanium material, it is perfect for a realization of plasmonic germanium photodetectors. Such a photodetector even without optimization provides a responsivity exceeding 1 A/W for both wavelengths of 1310 nm and 1550 nm. To achieve such a responsivity, only a 5 μm-long waveguide is required for 1310 nm and 30 μm-long for 1550 nm. With optimization this value can be highly improved. In the proposed arrangement a metal stripe simultaneously supports a propagating mode and serves as one of the electrodes, while the second electrode is located a short distance from the waveguide. As a propagating mode is tightly confined to the germanium ridge, the external electrode can be placed very close to the waveguide without disturbing it. As such, the distance between electrodes can be smaller than 350 nm which allows one to achieve a bandwidth exceeding 100 GHz. However, as most of the carriers are generated inside a distance of 100 nm from a stripe, a bandwidth exceeding 150 GHz can be achieved for a bias voltage of -4 V.

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Section: Figure Of Merit Of Lr-dlspp Waveguidesmentioning

confidence: 75%

Section: Figure Of Merit Of Lr-dlspp Waveguidesmentioning

confidence: 99%

High-bandwidth and high-responsivity waveguide-integrated plasmonic germanium photodetector

Gosciniak

Rasras

2019

J. Opt. Soc. Am. B

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“…Importantly, the in-plane electric field component of the LR-DLSPP modeessential for absorption in graphene, is very strong close to the graphene sheet even for the TM mode ( Fig. 1c) [58][59][60][61][62]. In our design, only half of the waveguide shown in Fig.…”

Section: Proposed Graphene Photodetector Arrangementmentioning

confidence: 92%

Ultrafast Plasmonic Graphene Photodetector Based on the Channel Photothermoelectric Effect

2020

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We propose an on-chip CMOS compatible graphene plasmonic photodetector based on the photothermoelectric effect (PTE) that occurs across an entire homogeneous graphene channel. The proposed photodetector incorporates the long-range dielectric-loaded surface plasmon polariton (LR-DLSPP) waveguide with a metal stripe serving simultaneously as a plasmon supporting metallic material and one of the metal electrodes. Large in-plane component of the transverse magnetic (TM) plasmonic mode can couple efficiently to the graphene causing large temperature increases across an entire graphene channel with a maximum located at the metal stripe edge. As a result, the electronic temperatures exceeding 12000K at input power of only a few tens of μW can be obtained at the telecom wavelength of 1550nm. Even with limitations such as the melting temperature of graphene (T= 4510 K), a responsivity exceeding at least 200 A/W is achievable at telecom wavelength of 1550 nm. It is also shown that under certain operation conditions, the PTE channel photocurrent can be isolated from photovoltaic and p-n junction PTE contributions providing an efficient way for optimizing the overall photodetector performance.

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“…The possibility of an electromagnetic energy concentration and low loss propagation fundamentally depends on the geometrical structure of the SPP waveguide. Typical SPP waveguide structures are reported in the literature, such as metallic nanowires [2,3], metal strips [4,5], an array of metal nanoparticles [6], V-shaped waveguides [7,8] and wedge-shaped waveguides [9][10][11]. The structure of an SPP waveguide usually consists of a thin metallic layer deposited directly on a dielectric or separated from a dielectric by an insulator.…”

Section: Introductionmentioning

confidence: 99%

Wedge Surface Plasmon Polariton Waveguides Based on Wet-Bulk Micromachining

Hương¹,

Chính²,

Hoang³

2019

Photonics

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In this paper, we propose and investigate the modal characteristics of wedge surface plasmon polariton (SPP) waveguides for guiding surface plasmon waves. The wedge SPP waveguides are composed of a silver layer deposited onto the surface of a wedge-shaped silicon dielectric waveguide. The wedge-shaped silicon dielectric waveguides are explored from the anisotropic wet etching property of single crystal silicon. The wedge SPP waveguides are embedded in a dielectric medium to form the metal–dielectric interface for guiding the surface plasmon waves. The propagation characteristics of the wedge SPP waveguides at the optical telecommunication wavelength of 1.55 μm are evaluated by a numerical simulation. The influence of the physical parameters such as the dimensions of the wedge SPP waveguide and the refractive index of the dielectric medium on the propagation of the surface plasmon wave is investigated. In addition, by comparing the propagation characteristics, we derive the wedge SPP waveguide with the optimal performance.

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Integrated amorphous silicon-aluminum long-range surface plasmon polariton (LR-SPP) waveguides

Cited by 18 publications

References 39 publications

High-bandwidth and high-responsivity waveguide-integrated plasmonic germanium photodetector

High-bandwidth and high-responsivity waveguide-integrated plasmonic germanium photodetector

Ultrafast Plasmonic Graphene Photodetector Based on the Channel Photothermoelectric Effect

Wedge Surface Plasmon Polariton Waveguides Based on Wet-Bulk Micromachining

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