An on-chip colloidal magneto-optical grating

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 m...

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Bibliographic Details
Published inApplied physics letters Vol. 108; no. 16
Main Authors Prikockis, M., Wijesinghe, H., Chen, A., VanCourt, J., Roderick, D., Sooryakumar, R.
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 18.04.2016
Subjects
Applied physics
Beam steering
BEAMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONTAINMENT
DESIGN
DIFFRACTION
Ferrous alloys
GRATINGS
Gratings (spectra)
Light diffraction
Magnetic alloys
MAGNETIC FIELDS
MATTER
NANOPARTICLES
PERMALLOY
SHAPE
SUPERPARAMAGNETISM
SURFACES
VISIBLE RADIATION
WAVELENGTHS
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Summary: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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4947438