Nonlinear gallium phosphide nanoscale photonics [Invited]

Martin, Aude; Combrié, Sylvain; Rossi, Alfredo De; Beaudoin, G.; Sagnes, I.; Raineri, Fabrice

doi:10.1364/prj.6.000b43

Cited by 31 publications

(18 citation statements)

References 37 publications

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“…The values of n 2 measured for the infrared wavelengths are one order of magnitude lower than the first estimate. [ 13,14 ] The first value was applied to the computations. In any case, the values of effective

n_{2 normaleff}

calculated in the present work can be scaled for adoption to other magnitude of the second‐order index of refraction of bulk GaP.…”

Section: Fdtd Simulation Detailsmentioning

confidence: 99%

Giant Enhancement and Sign Inversion of Optical Kerr Nonlinearity in Random High Index Nanocomposites near Mie Resonances

Panov

2020

Annalen der Physik

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The optical Kerr effect of nanocomposites consisting of high refractive index (GaP) spheres is studied by means of three-dimensional finite-difference time-domain (FDTD) simulations at the wavelength of 532 nm. The effective nonlinear refractive index of 0.8 µm thick nanocomposites and metasurfaces is evaluated. It is shown that the optical Kerr nonlinearity of the nanocomposites rises by orders in proximity to Mie resonances and may exceed the second-order refractive index of the bulk material. The nonlinearity enhancement is more pronounced for the metasurfaces. Unexpectedly, the sign of the effective optical Kerr coefficient is inverted for some range of the sphere sizes above the Mie resonances.

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n_{2 normaleff}

calculated in the present work can be scaled for adoption to other magnitude of the second‐order index of refraction of bulk GaP.…”

Section: Fdtd Simulation Detailsmentioning

confidence: 99%

Giant Enhancement and Sign Inversion of Optical Kerr Nonlinearity in Random High Index Nanocomposites near Mie Resonances

Panov

2020

Annalen der Physik

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“…Moreover, in both cases, propagation loss was insufficient to observe strong χ (3) effects. Indeed, to date, the χ (3) nonlinearity of GaP has only been measured with ultra-short light pulses at optical wavelengths [23,24], and promising applica- FIG. 1.…”

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confidence: 99%

Integrated gallium phosphide nonlinear photonics

et al. 2019

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Gallium phosphide (GaP) is an indirect bandgap semiconductor used widely in solid-state lighting. Despite numerous intriguing optical properties-including large χ (2) and χ (3) coefficients, a high refractive index (> 3), and transparency from visible to long-infrared wavelengths (0.55 − 11 µm)its application as an integrated photonics material has been little studied. Here we introduce GaPon-insulator as a platform for nonlinear photonics, exploiting a direct wafer bonding approach to realize integrated waveguides with 1.2 dB/cm loss in the telecommunications C-band (on par with Si-on-insulator). High quality (Q > 10 5 ), grating-coupled ring resonators are fabricated and studied. Employing a modulation transfer approach, we obtain a direct experimental estimate of the nonlinear index of GaP at telecommunication wavelengths: n2 = 1.2(5) × 10 −17 m 2 /W. We also observe Kerr frequency comb generation in resonators with engineered dispersion. Parametric threshold powers as low as 3 mW are realized, followed by broadband (> 100 nm) frequency combs with sub-THz spacing, frequency-doubled combs and, in a separate device, efficient Raman lasing. These results signal the emergence of GaP-on-insulator as a novel platform for integrated nonlinear photonics.

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“…This is not the case for wide-bandgap III-V semiconductors such as aluminum nitride (AlN), gallium nitride (GaN) or gallium phosphide (GaP). Recently, many efforts have focused on the realization of an integrated platform using GaP as a nonlinear medium [1][2][3][4][5]. Indeed, this material with a refractive index of 3.05 and transparency for wavelengths longer than 0.55 µm also displays large χ (2) and χ (3) coefficients, making this semiconductor an excellent candidate for the next generation of nonlinear systems on a chip.…”

Section: Introductionmentioning

confidence: 99%