We demonstrate broadband tuning of an optomechanical microcavity optical resonance by exploring the large optomechanical coupling of a double-wheel microcavity and its uniquely low mechanical stiffness. Using a pump laser with only 13 mW at telecom wavelengths we show tuning of the silicon nitride microcavity resonances over 32 nm. This corresponds to a… (More)
A small depression is created in a straight optical fiber taper to form a local probe suitable for studying closely spaced, planar micropho-tonic devices. The tension of the " dimpled " taper controls the probe-sample interaction length and the level of noise present during coupling measurements. Practical demonstrations with high-Q silicon microcavities… (More)
The quality factors of modes in nearly identical GaAs and Al 0.18 Ga 0.82 As microdisks are tracked over three wavelength ranges centered at 980, 1460, and 1600 nm, with quality factors measured as high as 6.62ϫ 10 5 in the 1600 nm band. After accounting for surface scattering, the remaining loss is due to sub-band-gap absorption in the bulk and on the… (More)
We demonstrate a method for adiabatically self-tuning a silicon microdisk resonator. This mechanism is not only able to sensitively probe the fast nonlinear cavity dynamics, but also provides various optical functionalities like pulse compression, shaping, and tunable time delay.
We propose a novel scheme for continuous-wave pumped optical parametric oscillation (OPO) inside silicon micro-resonators. The proposed scheme not only requires a relative low lasing threshold, but also exhibits extremely broad tunability extending from the telecom band to mid infrared.
We develop a general framework of evaluating the Stimulated Brillouin Scattering (SBS) gain coefficient in optical waveguides via the overlap integral between optical and elastic eigen-modes. This full-vectorial formulation of SBS coupling rigorously accounts for the effects of both radiation pressure and electrostriction within micro-and nano-scale… (More)
We report on the first synthesis and structural characterizations of a new Erbium (Er) compound, the erbium chloride silicate (ECS, Er 3 Cl(SiO 4) 2) single crystal in a Si-ECS core-shell nanowire form. The Er-concentration in ECS at 1.6x10 22 cm −3 is three orders of magnitude higher than that of the Er-doped materials. Photoluminescence spectra at both… (More)
We propose a light-structure interaction that utilizes circularly polarized light to deform a slightly bent waveguide. The mechanism allows for flipping the direction of deformation upon changing the binary polarization state of light from to . Temporal behavior of radiation-pressure-induced vibrations of an optical microcavity phonon mode, " Phys.… (More)
A photonic crystal nanocavity with a Quality (Q) factor of 1.4 × 10 6 , a mode volume of 0.78(λ /n) 3 , and an operating wavelength of 637 nm is designed in a silicon nitride (SiN x) ridge waveguide with refractive index of 2.0. The effect on the cavity Q factor and mode volume of single diamond nanocrystals of various sizes and locations embedded in the… (More)