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The nonlinear optical properties of AlGaAs at the half band gap
We report experimental values for the nonlinear optical coefficients of AlGaAs, in the half-band-gap spectral region. The dispersion of the nonlinear refractive-index coefficient, n/sub 2/, is…
Discrete Spatial Optical Solitons in Waveguide Arrays
We report the observation of discrete spatial optical solitons in an array of 41 waveguides. Lightwas coupled to the central waveguide. At low power, the propagating ﬁeld spreads as it couples tomore…
Experimental Observation of Linear and Nonlinear Optical Bloch Oscillations
We experimentally demonstrate the occurrence of optical Bloch oscillations in a waveguide array with linearly growing effective index of the individual guides. We monitored the output profiles for…
Coated nonmagnetic spheres with a negative index of refraction at infrared frequencies
Received 4 October 2005; revised manuscript received 28 November 2005; published 6 January 2006A three-dimensional lattice of micron-scale coated spheres is shown to have an isotropic negative index…
Compact and silicon-on-insulator-compatible hybrid plasmonic TE-pass polarizer.
Finite-difference time-domain simulation indicates that the proposed device can provide large extinction ratio with low insertion loss for the TE mode, and a very compact and broadband TE-pass polarizer can be implemented.
Voltage-Controlled Switching and Thermal Effects in VO2 Nano-Gap Junctions
- A. Joushaghani, Junho Jeong, S. Paradis, D. Alain, J. Aitchison, J. Poon
- Physics, Engineering
- 3 June 2014
Voltage-controlled switching in lateral VO2 nano-gap junctions with different gap lengths and thermal properties was investigated. The effect of Joule heating on the phase transition was found to be…
Nonautonomous contact guidance signaling during collective cell migration
- Camila Londoño, M. J. Loureiro, A. McGuigan
- BiologyProceedings of the National Academy of Sciences
- 21 January 2014
This work quantifies the migratory response of confluent monolayers of epithelial and fibroblast cells to contact guidance cues provided by grooved topography and shows that, in both sparse clusters and confluent sheets, individual cells are contact-guided by grooves and show more coordinated behavior on grooved versus flat substrates.
Compact highly-nonlinear AlGaAs waveguides for efficient wavelength conversion.
A broad-band self-phase modulation with a nonlinear phase shift up to 6π, and four-wave mixing with a 20-nm tuning range and signal-to-idler conversion efficiency up to 10 dB are demonstrated.
Observation of spatial optical solitons in a nonlinear glass waveguide.
We report the observation of spatial optical solitons due to the Kerr nonlinearity in a planar glass waveguide and present measurements of the nonlinear response obtained by placing a pinhole at the…
Propagation characteristics of hybrid modes supported by metal-low-high index waveguides and bends.
The properties of the hybrid mode in detail are investigated in detail and the possibility of realizing compact waveguide bends using this wave guiding scheme is demonstrated.