We report nonlinear measurements on 80microm silicon photonic crystal waveguides that are designed to support dispersionless slow light with group velocities between c/20 and c/50. By launching picoseconds pulses into the comparing their output spectral signatures, we show how self phase modulation induced broadening is enhanced due light. Comparison of numerical simulations pulse propagation elucidates contribution various effects determine shape waveguide transfer function. In particular,...

We present a summary of our recent experiments showing how various nonlinear phenomena are enhanced due to slow light in silicon photonic crystal waveguides. These processes include self-phase modulation (SPM), two-photon absorption (TPA), free-carrier related effects, and third-harmonic generation, the last effect being associated with emission green visible light, an unexpected phenomenon silicon. demonstrations exploit waveguides engineered support modes range group velocities as low c/50...

We experimentally investigate four-wave mixing (FWM) in short (80 μm) dispersion-engineered slow light silicon photonic crystal waveguides. The pump, probe and idler signals all lie a 14 nm wide low dispersion region with near-constant group velocity of c/30. measure an instantaneous conversion efficiency up to -9dB between the continuous-wave probe, 1W peak pump power 6 pump-probe detuning. This is found be considerably higher (>10 × ) than that Si nanowire ten times larger. In addition, we...

We present a technique based on the selective liquid infiltration of photonic crystal (PhC) waveguides to produce very small dispersion slow light over substantial bandwidth. numerically demonstrate that this approach allows one control group velocity (from c/20 c/110) from single PhC waveguide design, simply by choosing index infiltrate. In addition, we show method is tolerant deviations in parameters such as hole size, which relaxes constraint fabrication accuracy compared previous...

Using numerical analysis, we compare the results of optofluidic and rod filling techniques for broadening supercontinuum spectra generated by As2Se3 chalcogenide photonic crystal fibers (PCFs). The show that when air-holes constituting innermost ring in a PCF made As2Se3-based glass are filled with rods glass, over wide range mid-IR wavelengths, an ultra-flattened near-zero dispersion can be obtained, while total loss is negligible nonlinearity very high. simulations also 50 fs input optical...

We propose a technique based on optofluidic infiltration to design photonic crystal fiber (PCF) control chromatic dispersion for supercontinuum generation. Selectively infiltrating the PCF air-holes with an optical fluid having appropriate refractive index, we have achieved low confinement loss and ultra-flattened near zero centered about λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ZD</sub> ~ 1325 nm, without need nano-scale geometrical...

Due to the pronounced scientific and technical attention paid mid-infrared spectral region, we focus on ultra-wide supercontinuum generation in As <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">40</sub> Se xmlns:xlink="http://www.w3.org/1999/xlink">60</sub> chalcogenide SIF PCF - step index photonic crystal fibers using a symmetrized split Fourier method (S-SSFM). Simulations reveal, response launching 100 fs input pulses of 50 kW peak powers,...

In this paper, we investigate both analytically and numerically four-wave mixing (FWM) in short (80 microm) dispersion engineered slow light photonic crystal waveguides. We demonstrate that a larger FWM conversion efficiency an increased bandwidth (approximately 10 nm) can be achieved these waveguides as compared to dispersive PhC This improvement is through the net enhancement of (almost 30dB fast nanowire similar length), even presence linear nonlinear losses, suitable profile show how...

We present a technique based on the optofluidic method to design photonic crystal fiber (PCF) experiencing small dispersion over broad range of wavelengths. Without nano-scale variation in air-hole diameter or lattice constant Λ, even changing shape air holes, this approach allows us control fundamental mode PCF simply by choosing suitable refractive index liquid infiltrate into holes PCF. Moreover, one can different such as flattened (DFF), shifted (DSF), utilizing fluids various indices.

In this paper, we propose a liquid core-cladding photonic crystal fiber (PCF), which is engineered with different available organic optofluidics, to generate supercontinuum in the visible and near-infrared regimes by using symmetrized split-step Fourier method. Simulations reveal that response launching 50&#x00A0;fs input pulses of 10&#x00A0;kW peak power, centered about &#x03BB;0=1032 1560&#x00A0;nm, into 10&#x00A0;mm long PCF, maximum 2&#x00A0;&#x03BC;m supercontinua from 500...

This publisher’s note amends the author list of J. Opt. Soc. Am. B35, 323 (2018)JOBPDE0740-322410.1364/JOSAB.35.000323.

A tunable slow-light hollow-core photonic crystal fiber (HPCF), applicable to miniaturized microstructure spectroscopic gas sensors is proposed. In the proposed structure, we have taken advantage of microfluidic infiltration technique tune regime so as match reference absorption line target sample, which required for designing with reconfigurable detection sensitivity. The main feature this structure that enhanced electrical field strongly localized in a any samples due tunability modes. We...

We present the design procedure for an ultracompact low-power all-optical modulator based on a dispersion-engineered slow-light regime in photonic crystal Mach-Zehnder interferometer (PhC MZI), selectively infiltrated by nonlinear optical fluids. The dispersionless enhancing nonlinearities enabled 22 μm long PhC MZI to operate as with input power low 3 mW/μm. Simulations reveal that switching threshold can be controlled varying optofluidic infiltration.

A tunable nor gate based on the Kerr effect in silicon-rod-based photonic crystals is presented. The proposed consists of two-dimensional crystal add–drop filters with wavelength-selective reflector cavities, which are aligned series each other. main feature this structure enhancement nonlinear phenomena caused by strong light localization nanocavities. Because feature, designed can control amount dropped probe signal and change output. operation investigated numerically using...

A microwave photonic frequency measurement system is demonstrated practically. The employs the four-wave mixing effect in a highly nonlinear fiber to produce low-frequency output voltage, which function of input RF frequency. Using an algorithm that allows dynamic reconfiguration, able instantaneously monitor broad range for threat signals and provide fast yet accurate measurement. An operating 0.04-40 GHz with at most 0.016% error achieved.

A highly sensitive photonic crystal-based optofluidic biolaser and a feasible proposal for lab-on-a-chip biosensing by this extensible device are theoretically demonstrated. The 3D finite-difference-time-domain simulations indicate that the proposed can potentially be used in applications. results illustrate intensity sensitivity of 1.45 × 105 %/RIU an HIV-1 virion. Moreover, dependencies lasing characteristics such as threshold power conversion efficiency on presence bioparticles inside...

We are proposing a procedure to reconfigure three-port photonic crystal channel drop filter with two point-defect resonant cavities coupled bus and W1-type waveguide, by means of selective optofluidic infiltration. Simulations show that, infiltration the air holes parallel line defects that partially surrounding waveguide proposed (CDF), besides fine-tuning frequencies desired values, one can also fine-tune CDF phase an optimum condition for achieving efficiency any given frequency. have...

A multifluid infiltrated input/output coupler for efficient light transmission from a slow hole-type hexagonal photonic crystal waveguide (PCW) was designed based on the optofluidic technique. The structure of is similar to regular PCW, with little difference in two innermost rows, which are filled different fluids. This allows experience step-by-step change its group velocity as it reaches and passes central PCW. Simulation results reveal improvement more than 75% use three-fluid compared...

We present a novel Schottky contact photodetector (PD) based on internal photoemission effect (IPE) comprising of straight air-slot-waveguide (WG) and metal/silicide stripe buried in p-type Si microring resonator (MRR) for optical communication. Several metal/silicides are considered the (PtSi, Pd2Si, TaSi2, AAgg). This PD benefits from essential features slot-WGs, MRR-based PDs, double barrier (DSB) PDs. For TaSi2 using DSB S-WG-MRR with high feature, numerical simulation predicts...

We are proposing a procedure to enhance the transmission efficiency of 60° photonic crystal (PhC) waveguide bends by means selective optofluidic infiltration an air hole, which is created as point defect at center conventional PhC bend. Numerical studies demonstrate that varying radius and indices optical fluids, one may bend level tune its 3 dB bandwidth over substantial range 88-138 nm. In order perform numerical simulations, we have used two-dimensional (2D) finite difference time domain...