Enhancement of four-wave mixing via interference of multiple plasmonic conversion paths

Singh, Shailendra Kumar; Abak, Musa Kurtulus; Tașgın, Mehmet Emre

doi:10.1103/physrevb.93.035410

Cited by 40 publications

(26 citation statements)

References 52 publications

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“…Interpretation of why enhancement and suppression take place in second harmonic field can be done by examining the denominator of the Eq. (11). Here, we demonstrate how second harmonic field can be enhanced without any modification in the linear response,α 1 .…”

Section: 2mentioning

confidence: 65%

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Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Günay

Artvin

Bek

et al. 2018

Journal of Modern Optics

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Nonlinear signal even from a single molecule becomes visible at hot spots of plasmonic nanoparticles. In these structures, Fano resonances can control the nonlinear response in two ways. (i) A linear Fano resonance can enhance the hot spot field, resulting enhanced nonlinear signal. (ii) A nonlinear Fano resonance can enhance the nonlinear signal without enhancing the hot spot. In this study, we compare the enhancement of second harmonic signal at the steady-state obtained via these two methods. Since we are interested in the steady-state signal, we adapt a linear enhancement which works at the steady-state. This is different than the dark-hot resonances that appears in the transparency window due to enhanced plasmon lifetime.

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Section: 2mentioning

confidence: 65%

“…We examine the denominator of the last term in the denominator of the Eq. (11). When a QE level spacing is chosen close to the second harmonic frequency ω eg ≈ 2ω, the last term becomes f 2 2 y/γ eg .…”

Section: 2mentioning

confidence: 99%

Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Günay

Artvin

Bek

et al. 2018

Journal of Modern Optics

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“…In Ref. [29], we show that presence of an extra molecule can also help to (partially) cancel the γ 2 term in the denominator which cannot be performed using a single molecule. However, this complicated situation is out of the scope of this paper.…”

Section: B Demonstration Of the Path Interference Effectsmentioning

confidence: 99%

“…In our theoretical and numerical studies using 3D simulations with retardation effects [23,26,28,29], we have demonstrated that path interference schemes can be adopted to gain control over the nonlinear frequency conversion processes emerging in plasmonic resonators. By appropriately choosing the level spacing of the quantum oscillator (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies [26][27][28] reveal that Fano resonances of coupled plasmonic-quantum systems can also enhance the SHG and four-wave mixing [29] processes. In our theoretical and numerical studies using 3D simulations with retardation effects [23,26,28,29], we have demonstrated that path interference schemes can be adopted to gain control over the nonlinear frequency conversion processes emerging in plasmonic resonators.…”

Section: Introductionmentioning

confidence: 99%

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Fluorescence excitation by enhanced plasmon upconversion under continuous wave illumination

Tașgın

Salakhutdinov

Kendziora

et al. 2016

Photonics and Nanostructures - Fundamentals and Applications

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We demonstrate effective background-free continuous wave nonlinear optical excitation of molecules that are sandwiched between asymmetrically constructed plasmonic gold nanoparticle clusters. We observe that near infrared photons are converted to visible photons through efficient plasmonic second harmonic generation. Our theoretical model and simulations demonstrate that Fano resonances may be responsible for being able to observe nonlinear conversion using a continuous wave light source. We show that nonlinearity enhancement of plasmonic nanostructures via coupled quantum mechanical oscillators such as molecules can be several orders larger as compared to their classical counterparts.

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A Study of Degenerate Four‐Wave Mixing and Phase Conjugation in Metallic Nanohybrids

Singh,

Meng,

Jiang

2024

Advanced Optical Materials

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A theory of degenerate four‐wave mixing (DFWM) and phase conjugation is developed for metallic nanohybrids, which consist of an ensemble of interacting metallic nanoshells and noninteracting quantum dots (QDs). It is considered that three incident waves are applied to the metallic nanohybrid, and they produce a fourth output mixed wave. These waves induce dipoles in metallic nanoshells, generating surface plasmon polaritons, and interact with each other via the dipole–dipole interactions (DDI). In DFWM, the input and output waves travel in opposite directions, and this retroreflective nature is responsible for the phenomenon of phase conjugation. The analytical expressions for the input transmitted and output reflected wave intensities are calculated in the presence of the surface plasmon polaritons (SPPs) and the DDI polaritons. It is demonstrated that the phase conjugation, the phase coherent phenomena, and the intensities of both input transmitted and output reflected waves are enhanced due to SPPs and DDI polaritons. These findings indicate that the nanohybrid acts as a phase conjugate device and a phase coherent optical amplifier, which can be applied to fabricate optical nanoamplifiers, phase conjugate mirrors, and nanosensors by measuring the intensity of the output reflected wave.

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Enhancement of four-wave mixing via interference of multiple plasmonic conversion paths

Cited by 40 publications

References 52 publications

Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Controlling steady-state second harmonic signal via linear and nonlinear Fano resonances

Fluorescence excitation by enhanced plasmon upconversion under continuous wave illumination

A Study of Degenerate Four‐Wave Mixing and Phase Conjugation in Metallic Nanohybrids

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