We discuss a novel method for generating octave-spanning supercontinua and few-cycle pulses in the important mid-IR wavelength range. The technique relies on strongly phase-mismatched cascaded second-harmonic generation (SHG) in mid-IR nonlinear frequency conversion crystals. Importantly we here investigate the so-called noncritical SHG case, where no phase matching can be achieved but as a com...

how to cite this article: kazemi h, speckmann ej, gorji a. familial hemiplegic migraine and spreading depression. iran j child neurol. 2014 summer;8(3): 6-11.   abstract objective familial hemiplegic migraine (fhm) is an autosomal dominantly inherited subtype of migraine with aura, characterized by transient neurological signs and symptoms. typical hemiplegic migraine attacks start in the first...

We study the anisotropic nature of the Kerr nonlinear response in a beta-barium borate (β -BaB2O4, BBO) nonlinear crystal. The focus is on determining the relevant χ(3) cubic tensor components that affect interaction of type I cascaded second-harmonic generation. Various experiments in the literature are analyzed and we correct the data from some of the experiments for contributions from cascad...

•Metallic gels consisting of pendular suspension Cu, EGaIn, and water•The are 3D-printable at room temperature over a wide compositional window•Shear alignment by dispensing enables 4D printing conductive metal composites•Printed parts have metallic conductivity 1.05 × 105 S/m without sintering step Four-dimensional (4D) refers to 3D-printed structures that change shape with respect time in res...