High-efficiency and broadband four-wave mixing in a silicon-graphene strip waveguide with a windowed silica top layer

Abstract

We experimentally demonstrate high-efficiency and broadband four-wave mixing in a silicon-graphene strip waveguide. A four-wave mixing conversion efficiency of −38.7 dB and a 3-dB conversion bandwidth of 35 nm are achieved in the silicon-graphene strip waveguide with an optimized light-graphene interaction length of 60 μm. The interaction length is controlled by a windowed area of silica layer on the silicon waveguide. Numerical simulations and experimental studies are carried out and show a nonlinear parameter γ GOS as large as 10 4 W −1 · m −1 .

Impact of Mode-Area Dispersion on Nonlinear Pulse Propagation in Gas-Filled Anti-Resonant Hollow-Core Fiber

“…As seen from the GVD profile in Figure 1a, further away from the zero-dispersion wavelength at 1450 nm alleviates the impact of higher-order dispersion which deteriorates the soliton effect compression [26], resulting in a shorter compressed duration for the soliton in the WDA model that supports a wider spectral broadening, as shown in the second column in Figure 4a,b. Moreover, a higher nonlinear coefficient also enables more efficient energy transfer via the DFWM process [27] to the intermediate wavelength at 1.06 µm in the WDA model, as evident in Figure 3a,d. The reason for the shorter compressed duration and stronger spectral broadenin the WDA model despite the smaller soliton number is due to the wavelength-depen nonlinear coefficient, 𝛾(𝜔).…”

Two‐Dimensional Materials for Integrated Photonics: Recent Advances and Future Challenges

“…request more advanced material properties such as the novel and unique optoelectronic characteristics, large mechanical flexibility, and wide compatibility with nanofabrication processing technologies. 2DMs containing insulator (h‐BN), [ 60,61 ] semiconductors with various bandgaps (TMDCs, black phosphorous [BP]), [ 62–64 ] semimetal (graphene, WTe 2 ), [ 65–68 ] and metal (CrI 3 ) [ 69,70 ] could provide a wide range of options for optoelectronic devices and fulfill the request of emerging photonic applications ( Figure ) [ 43,71–85 ] because of their unique optical, electronic, thermal, and mechanical features. [ 86–90 ] First, 2DMs usually show better mechanical flexibility than their bulk counterparts due to the atomic‐level thickness; thereby, 2DMs are good choices for flexible photonics.…”

“…[ 77 ] Copyright 2018, Springer Nature), and four‐wave mixing (Reproduced with permission. [ 79 ] Copyright 2018, Chinese Laser Press)], quantum optics [quantum emitter (Reproduced with permission. [ 73 ] Copyright 2018, Optical Society of America) and moire exciton (Reproduced with permission.…”

Large and negative self-defocusing optical Kerr nonlinearity in Palladium di-Selenide 2D films

“…With their extraordinary nonlinear optical properties, two-dimensional (2D) layered materials such as graphene [1][2][3][4], graphene oxide (GO) [5][6][7][8][9], transition metal dichalcogenides (TMDCs) [10][11][12], and black phosphorus (BP) [13][14][15] have attracted a great deal of interest, enabling diverse nonlinear photonic devices with vastly superior performance compared to bulk materials. Amongst them, TMDCs (MX 2 , M = transition metal and X = chalcogen), with bandgaps in the near infrared to the visible region, have opened up promising new avenues for photonic and optoelectronic devices.…”