Self-mode-locking is a common way of generating very short laser pulses.12 It occurs when a beam self-focuses and narrows as it passes through a nonlinear intracavity material, thus expanding or contracting at other locations of the laser cavity.3 Since self-focusing is an intensity-dependent process, at any point in the cavity an intense (mode-locked) laser beam has a different size from a wea...

Self-mode-locked semiconductor disk lasers possess compact resonant cavity and stable construction. These devices have a wide application prospect because of their picosecond to sub-picosecond pulse width, excellent beam quality tailorable emission wavelength. In this paper, dynamics simulations self-mode-locking in laser are performed by using delay differential equations for the first time. T...

Spin polarization effects in nonmagnetic materials are generally believed as an outcome of spin-orbit coupling provided that the global inversion symmetry is lacking, also known 'spin-momentum locking'. The recently discovered hidden spin indicates specific atomic site asymmetry could induce measurable polarization, leading to a paradigm shift centrosymmetric crystals for potential spintronic a...

Silicene has introduced itself as an outstanding novel material, which seeks its meritorious place among common spintronic devices like Cu and Ag. In this work, photogalvanic effect in silicene is studied within the semi-classical approach beyond Dirac point approximation. Normal electric field plays role of effective pseudo-magnetic breaks inversion symmetry splits conduction valence bands. Th...

A weak form Galerkin finite element model for the nonlinear quasi-static and fully transient analysis of initially straight viscoelastic beams is developed using the kinematic assumptions of the third-order Reddy beam theory. The formulation assumes linear viscoelastic material properties and is applicable to problems involving small strains and moderate rotations. The viscoelastic constitutive...

For the first time a detailed study of hybrid mode-locking in two-section InAs/InP quantum dot Fabry-Pérot-type lasers is presented. The output pulses have a typical upchirp of approximately 8 ps/nm, leading to very elongated pulses. The mechanism leading to this typical pulse shape and the phase noise is investigated by detailed radio-frequency and optical spectral studies as well as time-doma...

We study the effects of quenched disorder on the dynamics of two-dimensional arrays of overdamped Josephson junctions. Disorder in both the junction critical currents and resistances is considered. Analytical results for small arrays are used to identify a physical mechanism which promotes frequency locking across each row of the array, and to show that no such locking mechanism exists between ...

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Studies in the vertebrates have shown that the time-locking ability of central auditory neurons decreases progressively along the ascending auditory pathway. This decrease is presumably attributed to a progressive reduction in the fidelity of synaptic transmission and an increase in the influence of synaptic inhibition along the cascade. The extent to which neurons' intrinsic biophysical proper...

Introduction The concept of bone anchors constructed of High Density Collagen (HDC) was introduced at this meeting last year. The healing of tendon to bone in an animal model during the critical first six months was found to be equal to that produced with a standard metallic anchor. Collagen is being investigated as a material for making anchors to avoid the drawbacks of the materials in the cu...