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We demonstrate a method to locally change the refractive index in planar optical devices by photodarkening of a thin chalcogenide glass layer deposited on top of the device. The method is used to tune the resonance of GaAs-based photonic crystal cavities by up to 3 nm at 940 nm. The method has broad applications for postproduction tuning of photonic… (More)
We present results showing the formation and evolution of a photonic crystal cavity during writing by selective optical exposure in a photosensitive chalcogenide photonic crystal. Q-factors of up to 125,000 were obtained in these cavities.
We demonstrate low loss photonic crystal waveguides in chalcogenide (Ge(33)As(12)Se(55)) glasses. The measured losses are as low as 21 dB/cm. We experimentally determine the refractive index of the thin film chalcogenide glass to be n = 2.6 and demonstrate that dispersion engineering can be performed up to a group index of ng = 40 in this relatively low… (More)
We report dispersion-engineered nanowire waveguides fabricated in Ge<inf>11.5</inf>As<inf>24</inf>Se<inf>54.5</inf> chalcogenide glass with a nonlinear parameter γ>150,000W<sup>−1</sup>km<sup>−1</sup>.
We present automatic and simultaneous compensation of combined higher-order dispersion and GVD fluctuations of a 1.28 Tbaud signal using a photonic-chip based RF-spectrum analyser and a spectral pulse-shaper.
We report third-harmonic generation in slow-light photonic crystal waveguides realized in chalcogenide glass membranes. This material enables a more uniform conversion along the waveguide and a higher efficiency than in comparable silicon structures.