An on-chip colloidal magneto-optical grating
Abstract
Interacting nano- and micro-particles provide opportunities to create a wide range of useful colloidal and soft matter constructs. In this letter, we examine interacting superparamagnetic polymeric particles residing on designed permalloy (Ni0.8 Fe0.2) shapes that are subject to weak time-orbiting magnetic fields. The precessing field and magnetic barriers that ensue along the outer perimeter of the shapes allow for containment concurrent with independent field-tunable ordering of the dipole-coupled particles. These remotely activated arrays with inter-particle spacing comparable to the wavelength of light yield microscopic on-chip surface gratings for beam steering and magnetically regulated light diffraction applications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 18, 2016
- Source ID
- 10.1063/1.4947438
Entities
People
- Athena Chen
- D. Roderick
- H. Wijesinghe
- J. Vancourt
- M. Prikockis
- R. Sooryakumar
Organizations
- Army Research Office
- Ohio State University