A photonic crystal fiber made of fused silica glass, infiltrated with chloroform (CHCl3), is proposed as a new source of supercontinuum (SC) light. Guiding properties in terms of effective refractive index, attenuation, and dispersion of the fundamental mode are studied numerically. As a result, two optimized structures are selected for and verified against SC generation in detail. The dispersion characteristic of the first structure is all-normal and equals  −7 ps  ·  nm−1 · km−1 at 0.92 μm, while the dispersion characteristic of the second structure has the zero-dispersion wavelength at 1 μm, and SC generation was demonstrated for the wavelength 1.03 μm. We prove the possibility of coherent octave-wide SC generation in the wavelength range of 600–1260 nm and soliton fission based low-coherence flat SC in the wavelength range of 600–1400 nm, with 400 fs pulses and 0.8 nJ of energy in-coupled into the core of the studied structures. Proposed fibers are good candidates for all-fiber SC sources as an alternative to glass core fibers, since nonlinearity of CHCl3 is higher than silica and its toxicity is negligible. The proposed solution may lead to new low-cost all-fiber optical systems.

Motivated by transformation of AB-stacking bilayer graphene into fluorinated single-layer diamond (fluorinated diamane C4F2), we investigate the structural, elastic, electronic, transport, and optical properties of fluorinated diamane C4F2 using density functional theory.

The dispersion characteristics of As2S3 solid-core photonic crystal fibers were investigated with the change of structural parameters including filling factor ( ) and lattice constant ( ). Photonic crystal fiber obtained diverse dispersion including all-normal and anomalous dispersion with two zero-wavelengths dispersion at all values of lattice constant investigated. The dispersion value increases when the lattice constant increases and the filling factor decreases. Photonic crystal fiber has a flat dispersion curve and closeness to the zero-dispersion curve in the long-wavelength range are advantages of this design. Based on the analysis of numerical simulation results, we have proposed two structures with optimal dispersion for the application of supercontinuum generation.

Abstract. The micro-lens arrays created by ultrasonic waves in the acousto-optical material (OAM) have been proposed and investigated. In previous works, the simulation results showed that the proposed micro-lens can be used for optical tweezers arrays to trap an assembly of micro-particles. In this article, the micro-particle sieving capability of optical tweezers arrays in Germanium modulated by ultrasonic waves is presented. The sieving processes are controlled by changing of initial phase or intensity and frequency of ultrasonic waves. The simulation results show that the optical tweezers arrays will act as the dynamical one, which can sieve the dielectric micro-particles in 3D space in the embedding fluid.