Field induced photonic bandgap in ferrodispersion

Abstract

A stable dispersion of micron size magnetite spheres in a ferrofluid exhibits several interesting magnetically induced effects like zero forward scattering, enhanced backward scattering etc. Here we show that at a critical magnetic field the dispersion inhibits propagation of certain optical frequencies. The field required to induce this photonic band gap is quite moderate and the technique can be easily adopted for lab-on-chip devices.

Experimental Demonstration of Magnetic Carriage for Transport of Light Trapped in Magnetizable Mie Spheres

“…[ 13,16 ] Commercially available magnetite powder was fi rst washed with dilute nitric acid to remove impurities. [ 13,16 ] Commercially available magnetite powder was fi rst washed with dilute nitric acid to remove impurities.…”