Third harmonic generation graphene sheet

Third harmonic generation graphene sheet

We observe optical third harmonic generation from graphene and few-layer graphite flakes produced by exfoliation. The emission scales with the cube of the intensity of the incident near-infrared femtosecond pulses and has a wavelength that is one-third of the incident wavelength, both consistent with third harmonic generation. Graphene dis-plays exceptionally strong light–matter interaction and electrically and broadband tunable third-order nonlinear susceptibility. Here, we show that the third-harmonic generation efficiency in graphene can be increased by almost two orders of magnitude by controlling the Fermi energy and the incident photon energy. May 21, 2018 · Gate tunable and ultrabroadband third-harmonic generation can be achieved in graphene, paving the way for electrically tunable broadband frequency converters for applications in optical ... third order susceptibility of graphene is large, especially in comparison to dielectric materials.15,16 Meanwhile, third har-monic generation in graphene has been experimentally inves-tigated in mechanically exfoliated graphene flakes by Kumar et al.10 and Hong et al.17 Theoretically, third harmonic gener-ation has been studied by Cheng et al ...

PHYSICAL REVIEW B 92, 155410 (2015) Cascaded third-harmonic generation in hybrid graphene-semiconductor waveguides Daria A. Smirnova 1,2 and Alexander S. Solntsev 1Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia Strong third-harmonic generation (THG) and multiphoton-absorption-excited fluorescence (MAEF) signals were observed with high contrast over the signal from the substrate. High contrast was also achieved between single- and bilayer graphene.

Mar 28, 2017 · In this paper, we demonstrate a mechanism for enhancing the third-harmonic generation (THG) in graphene-based optical diffraction gratings. Thus, we prove that by properly engineering the spectral location of plasmon resonances a pair of such resonances exist at the fundamental frequency (FF) and third harmonic (TH). Oct 25, 2018 · Benefiting from the large third-order nonlinear susceptibility of graphene and significantly enhanced field intensity of graphene plasmons (GPs), graphene has shown great potentials to enhance plasmonic third-harmonic generation conversion efficiency. Optimizing third-harmonic generation at terahertz frequencies in graphene Ibraheem Al-Naib, Max Poschmann, and Marc M. Dignam ... where A is the normalization area of the graphene sheet and DC current induced second order optical nonlinearity in graphene J. L. Cheng,1,2 N. Vermeulen, 1,∗ and J. E. Sipe 2 1Brussels Photonics Team (B-PHOT), Department of Applied Physics and Photonics

We study cascaded harmonic generation of hybrid surface plasmons in integrated planar waveguides composed of a graphene layer and a doped-semiconductor slab. We derive a comprehensive model of cascaded third-harmonic generation through phase-matched nonlinear interaction of fundamental, second-harmonic, and third-harmonic plasmonic modes supported by the structure. In this study, we demonstrate how field enhancement due to plasmonic resonances can noticeably improve the efficiency of third harmonic generation (THG) from graphene sheets on a grating substrate under normal illumination of terahertz (THz) waves. We explore how different parameters of graphene and ... Abstract We report the measurement of optical third harmonic generation from single-layer graphene and few-layer graphite flakes produced by exfoliation. In the measurements, femtosecond near-infrared laser pulses were used to irradiate the samples. PHYSICAL REVIEW B 92, 155410 (2015) Cascaded third-harmonic generation in hybrid graphene-semiconductor waveguides Daria A. Smirnova 1,2 and Alexander S. Solntsev 1Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia

Jan 01, 2018 · Third order nonlinear processes, such as optical Kerr effect, third harmonic generation and four wave mixing, have already been experimentally verified by single or few layer graphene thin films , , . Second order nonlinear processes such as difference frequency generation (DFG) are usually assumed to be forbidden in an isotropic medium, but ... We observe optical third harmonic generation from graphene and few-layer graphite flakes produced by exfoliation. The emission scales with the cube of the intensity of the incident near-infrared femtosecond pulses and has a wavelength that is one-third of the incident wavelength, both consistent with third harmonic generation.

Graphene displays a surprisingly large third order nonlinearity. Here, we report that conversion efficiencies approaching 10-4 are possible for third harmonic generation (THG). Moreover, the atomically thin nature of graphene allows for simple integration in cavity designs to increase this even further. We demonstrate a 117-fold enhancement in the third harmonic generation from graphene due to the integration of a graphene layer with a resonant cavity. This rather large enhancement occurs as the cavity is resonant for both the fundamental field and the third harmonic field.

Abstract Benefiting from the large third-order nonlinear susceptibility of graphene and significantly enhanced field intensity of graphene plasmons (GPs), graphene has shown great (29,30). Besides theNPL, a sharp peakat 433 nm duetothe third har-monic generation (THG) was also observed ( 31). As expected, THG is electric dipole–allowed for all graphene layers, and its intensity grows with the layer thickness. In addition to these known nonlinear optical features, a new and May 21, 2018 · Gate tunable and ultrabroadband third-harmonic generation can be achieved in graphene, paving the way for electrically tunable broadband frequency converters for applications in optical ...

generation [14]. This work focuses on third harmonic generation, which is described with a third order susceptibility (3).Mikhailovpredictedthat the third order susceptibility of graphene is large, especially in compari-son to dielectric materials [15][16]. Meanwhile, third harmonic generation 1 PHYSICAL REVIEW B 92, 155410 (2015) Cascaded third-harmonic generation in hybrid graphene-semiconductor waveguides Daria A. Smirnova 1,2 and Alexander S. Solntsev 1Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200, Australia

Abstract We observe optical third harmonic generation from graphene and few-layer graphite flakes produced by exfoliation. The emission scales with the cube of the intensity of the incident near-infrared femtosecond pulses and has a wavelength that is one-third of the incident wavelength, both consistent with third harmonic generation.

The scattering matrix theory has been developed to calculate the third-order nonlinear effect in sphere-graphene-slab structures. By designing structural parameters, we have demonstrated that the incident electromagnetic wave can be well confined in the graphene in these structures due to the formation of a bound state in the continuum (BIC) of radiation modes.

Aug 01, 2018 · Tunable third harmonic generation in graphene paves the way to high-speed optical communications and signal processing May 22, 2018 Extraordinarily strong nonlinear optical graphene-like material ... The scattering matrix theory has been developed to calculate the third-order nonlinear effect in sphere-graphene-slab structures. By designing structural parameters, we have demonstrated that the incident electromagnetic wave can be well confined in the graphene in these structures due to the formation of a bound state in the continuum (BIC) of radiation modes. Abstract Benefiting from the large third-order nonlinear susceptibility of graphene and significantly enhanced field intensity of graphene plasmons (GPs), graphene has shown great

Graphene dis-plays exceptionally strong light–matter interaction and electrically and broadband tunable third-order nonlinear susceptibility. Here, we show that the third-harmonic generation efficiency in graphene can be increased by almost two orders of magnitude by controlling the Fermi energy and the incident photon energy. May 30, 2018 · Researchers have shown for the first time gate tunable third harmonic generation in graphene. This could enable on-chip broadband optical switches for data transport in optical systems, leading to faster, more reliable ultra-broad bandwidth transfers.