Efficient second-harmonic generation in nonlinear plasmonic waveguide

Lu, Fengya; Li, T.; Hu, Xiaopeng; Cheng, Qingqing; Zhu, Shining; Zhu, Yanyan

doi:10.1364/ol.36.003371

Cited by 59 publications

(44 citation statements)

References 14 publications

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“…The proposed guide offers a number of advantages: it is very compact and provides a better compromise between loss and confinement compared to purely plasmonic guides. Since our first proposal, many different HPWG structures have been analyzed [12,13] and many applications of the HPWG have been suggested [14][15][16][17][18]. These devices can outperform previously reported SOI based devices.…”

Section: Introductionmentioning

confidence: 95%

Compact low loss and broadband hybrid plasmonic directional coupler

Alam¹,

Caspers²,

Aitchison³

et al. 2013

Opt. Express

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Abstract:We propose a novel broadband coupler for silicon photonics using a hybrid plasmonic waveguide section. The hybrid plasmonic waveguide is used to create an asymmetric section in the middle of a silicon nanowire waveguide coupler to introduce a phase delay to allow for a 3-dB power coupling ratio over a 150 nm bandwidth around 1.55 µm. The device is very compact (<8.5 µm) and has a low insertion loss (<0.15 dB).

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Section: Introductionmentioning

confidence: 95%

Compact low loss and broadband hybrid plasmonic directional coupler

Alam¹,

Caspers²,

Aitchison³

et al. 2013

Opt. Express

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show abstract

“…Despite extensive numerical simulations indicating promising prospects, nonlinear interactions in nanoplasmonic waveguides have remained elusive in the experimental realm, presumably because of additional practical challenges involved in the fabrication and direct nonlinear characterization of the nanoscale waveguides. Although SHG and THG in nanoplasmonic waveguides have been investigated numerically by several groups [120][121][122], to date, there has only been a single experimental report of optical harmonic generation. As depicted in Figs.…”

Section: Nonlinear Optics In Nanoplasmonic Waveguidesmentioning

confidence: 99%

Integrated nanoplasmonic waveguides for magnetic, nonlinear, and strong-field devices

et al. 2016

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Abstract:As modern complementary-metal-oxide-semiconductor (CMOS) circuitry rapidly approaches fundamental speed and bandwidth limitations, optical platforms have become promising candidates to circumvent these limits and facilitate massive increases in computational power. To compete with high density CMOS circuitry, optical technology within the plasmonic regime is desirable, because of the sub-diffraction limited confinement of electromagnetic energy, large optical bandwidth, and ultrafast processing capabilities. As such, nanoplasmonic waveguides act as nanoscale conduits for optical signals, thereby forming the backbone of such a platform. In recent years, significant research interest has developed to uncover the fundamental physics governing phenomena occurring within nanoplasmonic waveguides, and to implement unique optical devices. In doing so, a wide variety of material properties have been exploited. CMOS-compatible materials facilitate passive plasmonic routing devices for directing the confined radiation. Magnetic materials facilitate time-reversal symmetry breaking, aiding in the development of nonreciprocal isolators or modulators. Additionally, strong confinement and enhancement of electric fields within such waveguides require the use of materials with high nonlinear coefficients to achieve increased nonlinear optical phenomenon in a nanoscale footprint. Furthermore, this enhancement and confinement of the fields facilitate the study of strong-field effects within the solid-state environment of the waveguide. Here, we review current stateof-the-art physics and applications of nanoplasmonic waveguides pertaining to passive, magnetoplasmonic, nonlinear, and strong-field devices. Such components are essential elements in integrated optical circuitry, and each fulfill specific roles in truly developing a chip-scale plasmonic computing architecture.

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“…The surface plasmon polarizations (SPPs) enable light confinement beyond diffraction limit and field enhancement of localized intensities, which facilities the nonlinear processes remarkably. The SHG has been presented in plasmonic slot waveguides [9,10], long-range plasmonic waveguides [11], hybrid plasmonic waveguides [12] and plasmonic core-shell nanowires [13]. A promising way of further improving the conversion efficiency is the integration of plasmonic-based structures and the organic polymer with large nonlinear susceptibilities [8] .…”

Section: Introductionmentioning

confidence: 99%

Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

Sun¹,

Zhang²,

Cheng³

et al. 2015

Opt. Express

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Highly efficient second harmonic generation (SHG) bridging the mid-infrared (IR) and near-IR wavelengths in a coupled hyperbolic metamaterial waveguide with a nonlinear-polymer-filled nanoscale slot is theoretically investigated. By engineering the geometrical parameters, the collinear phase matching condition is satisfied between the even hybrid modes at the fundamental frequency (3,100 nm) and the second harmonic (1,550 nm). Two modes manifest the great field overlap and the significant field enhancement in the nonlinear integration area (i.e. the slot), which leads to extreme large nonlinear coupling coefficient. For a low pumping power of 100 mW, the device length is as short as 2.19 µm and the normalized conversion efficiency comes up to more than 6.37 × 10 5 W −1 cm −2 which outperforms that of the plasmonic-based structures. Moreover, the efficient SHG can be achieved with great phase matching tolerance, i.e., a small theoretical fabrication-error sensitivity to filling ratio and a broad pump bandwidth in a compact device length of 2.19 µm using 100 mW pump. The proposed scheme links the mature near-IR devices to the mid-IR regime and have a great potential for integrated chip-scale alloptical signal processes.

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Efficient second-harmonic generation in nonlinear plasmonic waveguide

Cited by 59 publications

References 14 publications

Compact low loss and broadband hybrid plasmonic directional coupler

Compact low loss and broadband hybrid plasmonic directional coupler

Integrated nanoplasmonic waveguides for magnetic, nonlinear, and strong-field devices

Highly efficient second harmonic generation in hyperbolic metamaterial slot waveguides with large phase matching tolerance

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