An on-chip colloidal magneto-optical grating

Journal Article · Mon Apr 18 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4947438· OSTI ID:22591595

Prikockis, M.; Wijesinghe, H.; Chen, A.; VanCourt, J.; Roderick, D.

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 (Ni{sub 0.8} Fe{sub 0.2}) 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.

• OSTI ID: 22591595
• Journal Information: Applied Physics Letters, Vol. 108, Issue 16; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
CONTAINMENT
DESIGN
DIFFRACTION
GRATINGS
MAGNETIC FIELDS
MATTER
NANOPARTICLES
PERMALLOY
SHAPE
SUPERPARAMAGNETISM
SURFACES
VISIBLE RADIATION
WAVELENGTHS