Michal Lipson

Conversion of a Signal Wavelength in a Dynamically Tuned Resonator

We show that the wavelength of light confined in a resonator can be controlled with a linear change of the refractive index in a time shorter than the cavity lifetime.

Tunable electro-optic modulator on silicon-on-insulator substrates using ring resonators

We study a compact electro-optic modulator using high-index contrast silicon ring resonators on silicon-on-insulator substrate. Optical modulation is achieved using the plasma dispersion effect due to current injection under forward bias of a p-i-n junction.

Optical Transmission in Horizontal Slot Waveguides

Horizontal single and multiple slot waveguides and ring resonators consisting of deposited amorphous silicon and silicon dioxide are demonstrated. Their waveguide propagation loss, optical confinement, and thermo-optic effects are studied.

Sub-Wavelength Mode Volumes in Silicon Optical Nanocavities

We demonstrate a reduction of effective mode volume to the order of 0.01 (?/2n)3 using dielectric discontinuities that enhance the local electric field in Silicon optical nanocavities.

Novel Structures for High Confinement in Sub-Wavelength Regions

We show high confinement in novel index nm-size waveguides and cavities. Enhancement of light by a few orders of magnitude relative to the input light is observed.

Optical bistability on silicon microphotonics

We demonstrate optical bistability on a silicon-based integrated optical device. Hysteresis curves and modulation measurements show bistable modulation depth of 10 dB and sub-microsecond time response.

Low power compact silicon electro-optic modulator

We propose a micron-size planar waveguide silicon electro-optic modulator based on a Fabry-Perot cavity. Both optical and carrier confinement into the cavity region lead to very low dc power consumption for modulation.