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A photonic crystal split-beam cavity capable of optomechanical detection of magnetic torques from a nanomagnetic permalloy film is presented. The magnetic response of the magnetometer coupled to torsional mechanical vibrations is observed in ambient conditions.
A thin film of magnetic permalloy is integrated into a photonic crystal split-beam cavity allowing for optomechanical detection of magnetic torques under applied fields. The magnetic response of the magnetometer is observed under ambient conditions.
Nano-optomechanical systems (NOMS) offer many advantages in transducing nanomechanical motion. These include very high displacement sensitivities along with very large frequency detection bandwidths due to their optical nature [1]. It follows from this that NOMS are a promising avenue for on-chip nanomechanical mass sensing. Nanomechanical beams are becoming smaller to increase their mass sensitivity...
The enhanced capabilities of contemporary pulsed light sources have led to the reflourishing, in recent years, of ultrafast imaging of micromagnetic dynamics. Concurrently, interest in the subject has been intensified by other factors, such as the emergence of intrinsic magnetic response times as a potential limitation to the ultimate bandwidth of magnetic data storage and by increasingly powerful...
Photonic crystal split-beam nanocavities are proposed and fabricated for optomechanical detection of torsional motion. Large optomechanical transduction around 20 GHz/nm allows for predicted torsional sensitivities down to 10−20 N·m√Hz.
Photonic crystal nanocavities with suspended central elements suitable for optomechanical detection of torsional forces are designed and fabricated. This “floating” low mass nanocavity may be mechanically coupled to nanomagnetic structures.
We report the fabrication of platinum (Pt) surfaces with single-angstrom flatness by template-stripping sputtered films from silicon wafers. For comparison, template-stripped (TS) gold (Au) is also produced from sputtered films using the same procedure. The surface wetting properties, refractive indices and extinction coefficients of the TS platinum are presented and compared against those of non-TS...
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