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| 1 | Nonlinear optical properties of integrated GeSbS chalcogenide waveguides显示文摘In this paper, we report the experimental characterization of highly nonlinear Ge Sb S chalcogenide glass waveguides.We used a single-beam characterization protocol that accounts for the magnitude and sign of the real and imaginary parts of the third-order nonlinear susceptibility of integrated Ge23 Sb7 S70(GeSbS) chalcogenide glass waveguides in the near-infrared wavelength range at λ =1580 nm. We measured a waveguide nonlinear parameter of 7.0±0.7 W^(-1)· m(-1), which corresponds to a nonlinear refractive index of n_2=0.93±0.08 × 10^(-18) m^2∕W,comparable to that of silicon, but with an 80 times lower two-photon absorption coefficient βTPA=0.010± 0.003 cm∕GW, accompanied with linear propagation losses as low as 0.5 dB/cm. The outstanding linear and nonlinear properties of Ge Sb S, with a measured nonlinear figure of merit FOMTPA=6.0 ±1.4 at λ =1580 nm, ultimately make it one of the most promising integrated platforms for the realization of nonlinear functionalities. | SAMUEL SERNA HONGTAO LIN CARLOS ALONSO-RAMOS ANUPAMA YADAV XAVIER LE ROUX KATHLEEN RICHARDSON ERIC CASSAN NICOLAS DUBREUIL JUEJUN HU LAURENT VIVIEN | 2018 | Photonics Research2018，6，5： | 3 |
| 2 | Hybrid silicon slotted photonic crystal waveguides:how does third order nonlinear performance scale with slow light?显示文摘We investigate in this paper the influence of slow light on the balance between the Kerr and two-photon absorption(TPA) processes in silicon slotted hybrid nonlinear waveguides. Three typical silicon photonic waveguide geometries are studied to estimate the influence of the light slow-down factor on the mode field overlap with the silicon region, as well as on the complex effective nonlinear susceptibility. It is found that slotted photonic crystal modes tend to focalize in their hollow core with increasing group index(n_G) values. Considering a hybrid integration of nonlinear polymers in such slotted waveguides, a relative decrease of the TPA process by more factor of 2 is predicted from n_G=10 to n_G=50. As a whole, this work shows that the relative influence of TPA decreases for slotted waveguides operating in the slow light regime, making them a suitable platform for third-order nonlinear optics. | Junfei Xia Samuel Serna Weiwei Zhang Laurent Vivien éric Cassan | 2016 | Photonics Research2016，4，6： | 2 |
| 3 | Large group-index bandwidth product empty core slow light photonic crystal waveguides for hybrid silicon photonics显示文摘这份报纸在绝缘体上在硅调查慢轻的繁殖宽槽 photonic 水晶波导(PCW ) 。二个设计计划被介绍,分别地依靠洞格子和槽的分散工程。模式模式和乐队图被 3D 飞机波浪扩大方法计算。然后,联合并且慢轻的繁殖在完整的 Mach-Zehnder 干涉仪(MZI ) 用有限差别时间领域方法被建模。结果显示出高振幅干扰穗和高联合效率。设备的制造和测量超过 50 与组索引导致慢轻的繁殖,当在也观察的乐队边附近的多重散布和局部性的模式时。这研究提供卓见因为在空核心槽的损失高组织索引波导。 | Charles CAER Xavier LE ROUX Samuel SERNA Weiwei ZHANG Laurent VIVIEN Eric CASSAN | 2014 | Frontiers of Optoelectronics2014，7，3： | 1 |
| 4 | Mode selection and dispersion engineering in Bragg-like slot photonic crystal waveguides for hybrid light-matter interactions显示文摘We introduce a family of slot photonic crystal waveguides(SPh CWs) for the hybrid integration of low-index active materials in silicon photonics with energy-confinement factors of ~30% in low-index regions. The proposed approach, which is based on a periodic indentation of the etched slot in the middle of the SPh CW, makes it possible to reconcile a simultaneously narrow and wide slot for exploiting the two modes of even symmetry of a SPh CW. The resulting mode-selection mechanism allows a flexible choice of the modes to be used. Furthermore,the proposed structure offers tremendous flexibility for adjusting the dispersive properties of the slot-confined modes, in particular of their slow-light effects. Flat band slow light in a bandwidth of about 60 nm with a group velocity dispersion factor jβ_2 j below 1 ps^2∕mm is numerically demonstrated by this approach, corresponding to a normalized delay bandwidth product of around 0.4. These results, obtained from hollow-core periodic waveguides that are directly designed in view of hybrid integration of active materials in mechanically robust structures(not based on free-standing membranes) could pave the way for the realization of on-chip slow-light bio-sensing,active hybrid-silicon optoelectronic devices, or all-optical hybrid-silicon nonlinear functionalities. | samuel serna weiwei zhang thi hong cam hoang carlos alonso-ramos delphine marris-morini laurent vivien eric cassan | 2018 | Photonics Research2018，9，1： | 0 |
| 5 | Third-order nonlinear optical susceptibility of crystalline oxide yttria-stabilized zirconia显示文摘Nonlinear all-optical technology is an ultimate route for the next-generation ultrafast signal processing of optical communication systems.New nonlinear functionalities need to be implemented in photonics,and complex oxides are considered as promising candidates due to their wide panel of attributes.In this context,yttria-stabilized zirconia(YSZ)stands out,thanks to its ability to be epitaxially grown on silicon,adapting the lattice for the crystalline oxide family of materials.We report,for the first time to the best of our knowledge,a detailed theoretical and experimental study about the third-order nonlinear susceptibility in crystalline YSZ.Via self-phase modulation-induced broadening and considering the in-plane orientation of YSZ,we experimentally obtained an effective Kerr coefficient of n2YSZ=4.0±2×10^-19 m^2·W^-1 in an 8%(mole fraction)YSZ waveguide.In agreement with the theoretically predicted n2YSZ=1.3×10^-19 m^2·W^-1,the third-order nonlinear coefficient of YSZ is comparable with the one of silicon nitride,which is already being used in nonlinear optics.These promising results are a new step toward the implementation of functional oxides for nonlinear optical applications. | GUILLAUME MARCAUD SAMUEL SERNA KARAMANIS PANAGHIOTIS CARLOS ALONSO-RAMOS XAVIER LE ROUX MATHIAS BERCIANO THOMAS MAROUTIAN GUILLAUME AGNUS PASCAL AUBERT ARNAUD JOLLIVET ALICIA RUIZ-CARIDAD LUDOVIC LARGEAU NATHALIE ISAC ERIC CASSAN SYLVIA MATZEN NICOLAS DUBREUIL MICHEL RERAT PHILIPPE LECOEUR LAURENT VIVIEN | 2020 | Photonics Research2020，8，2： | 0 |
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