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We present local investigations of the spectral evolution of ultrashort slow pulses as they propagate. We also show that nanoscale electrical and magnetic fields can be detected simultaneously.
We present an experimental demonstration of an optical switch operating in the quantum regime, consisting of a single trapped atom near a nanoscale photonic crystal cavity.
Optofluidics promises devices and systems in which both optical and fluidic components are integrated on the same chip. We will review progress in this field to date and present an outlook on future opportunities.
25 Gbps operation was obtained with extinction ratios of 2 – 4 dB for Vpp = 1.00 – 1.75 V in MZI modulator consisting of 200-µm photonic crystal slow light waveguide phase shifters.
We report optical trapping of 60 nm Au nanoparticles using photonic crystal slot-cavities with Q's of ∼7200 and 0.3mW of guided power at 1.6µm. Histograms of the cavity transmission are used to quantitatively analyze the trapping dynamics by modeling the back-action of the nanoparticles in the trap.
We combine the fast guided-mode expansion with a genetic algorithm to perform a global optimization of several widely used photonic crystal cavity designs. The procedure consistently improves their quality factor by more than one order of magnitude, and is in addition highly customizable.
Experimental studies on the chemical detection sensitivity of high surface area photonic crystal microring resonators are presented. We report a detection sensitivity of ∼170nm/RIU for slow-light resonance modes close to the band edge.
We demonstrate a novel artificial optical material, a “photonic hyper-crystal”, which combines properties of hyperbolic metamaterials and photonic crystals. It is based on cobalt nanoparticle ferrofluid subjected to magnetic field.
We examine the influence of disorder over millimeter lengthscales, in the transport of photons. Super-collimation is achieved for varying controlled degrees of disorder in large-scale measurements, supported by physical theory and simulations.
We demonstrate a method to manipulate the modes and retain high quality factors of 2D photonic crystal slabs with relatively large nano-features over a wide aspect ratio range through structural symmetry breaking within the unit cell by elliptical nano-holes.
We demonstrate Purcell enhancement of single NV centers in L3 photonic crystal cavities made from high-purity single-crystal diamond. Furthermore, NV centers were created using an implantation mask in the cavity high field region.
An optomechanical crystal nanobeam cavity with high optomechanical coupling rate is proposed and fabricated. Only by adjusting the radius of the air holes, the cavity realizes an optomechanical coupling rate as high as 1.24 MHz.
We propose the generation of vector beams in planar photonic crystal cavities with multiple missing-hole defects. The characters of the generated vector beams are analyzed from the intensity, phase and polarization distributions.
By incorporating two-dimensional photonic crystals into the surface of InGaN-based LEDs, the strong correlation between the air duty cycle and the light extraction efficiency of LEDs was demonstrated by optical and electrical measurement results.
A novel torsional cavity optomechanical system consisting of a nano-seesaw with one photonic crystal cavity on each side has been demonstrated, which exhibits extremely high mechanical sensitivity and can potentially reveal new optomechanical phenomena.
A triangular nanobeam architecture for a bulk-diamond quantum photonic networks based on silicon masking and angular etching is proposed and implemented. Cavities with Q>3×103 are demonstrated. S-bent interconnects for realizing a mm-scale network are introduced.
We demonstrate spontaneous emission enhancement (by an average factor of 4.6) and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity, at room temperature.
We demonstrate the enhanced four-wave mixing generated in silicon photonic crystal waveguides with monolayer graphene. An enhanced high conversion efficiency and wide detuning bandwidth is observed.
We demonstrate optical pulse compression by using two slow light in Si photonic crystal waveguide. Enhanced nonlinearity by slow light and tunable dispersion by integrated heaters achieved the compression from 8.6 to 2.6 ps.
We demonstrate spatial multiplexing of two heralded single photon sources created by bi-directionally pumping a single 96 µm photonic crystal waveguide. This enhances the source brightness by 51.2±4.0% whilst maintaining the coincidence to accidental ratio.
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