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Ultrabroadband and sensitive cavity optomechanical magnetometry

Photonics Research 2020年第7期8卷 1064-1071页

作者： Bei-Bei Li George Brawley Hamish Greenall Stefan Forstner eoin sheridan Halina Rubinsztein-Dunlop Warwick P.Bowen Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Mathematics and Physics The University of QueenslandSt LuciaQLD 4072Australia

Magnetostrictive optomechanical cavities provide a new optical readout approach to room-temperature *** we report ultrasensitive and ultrahigh bandwidth cavity optomechanical magnetometers constructed by embedding a grain of the magnetostrictive material Terfenol-D within a high quality(Q)optical microcavity on a silicon *** engineering their physical structure,we achieve a peak sensitivity of26 p T∕Hz1/2 p comparable to the best cryogenic microscale magnetometers,along with a 3 d B bandwidth as high as 11.3 *** classes of magnetic response are observed,which we postulate arise from the crystallinity of the *** allows single crystalline and polycrystalline grains to be distinguished at the level of a single *** results may enable applications such as lab-on-chip nuclear magnetic spectroscopy and magnetic navigation.

关键词： cavity magnetometer magneto

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Sensitivity and Performance of Cavity Optomechanical Field Sensors

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Photonic Sensors 2012年第3期2卷 259-270页

作者： Stefan FORSTNER Joachim KNITTEL eoin sheridan Jon D. SWAIM Halina RUBINSZTEIN-DUNLOP Warwick P. BOWEN School of Mathematics and Physics University of Queensland St Lucia Queensland 4072 Australia

这篇文章详细为为洞 optomechanical 领域传感器建模描述一种技术。磁性的 A 或电场越过传感器导致一个空间地变化的压力，它然后在系统的机械 eigenmodes 上导致力量。每个振荡器上的力量当时能从在 magnetostrictive 应力和相应 eigen... 详细信息

这篇文章详细为为洞 optomechanical 领域传感器建模描述一种技术。磁性的 A 或电场越过传感器导致一个空间地变化的压力，它然后在系统的机械 eigenmodes 上导致力量。每个振荡器上的力量当时能从在 magnetostrictive 应力和相应 eigenmode 之间的重叠积分是坚定的，与联合决定这力量能与被检测的最终的决定的强度的 optomechanical。而且，一个 optomechanical 磁场传感器为小型化以敏感和潜力与另外的磁场传感器相比。一个 optomechanical 传感器罐头潜在地超过类似的尺寸的最先进的磁强计，这被显示出，特别地另外的传感器基于 magnetostrictive 机制。

关键词：应力传感器光学机械灵敏度磁场传感器性能磁致伸缩机械传感器重叠积分

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Simple and customizable method for fabrication of high-aspect ratio microneedle molds using low-cost 3D printing

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Microsystems & Nanoengineering 2019年第1期5卷 250-263页

作者： Kevin J.Krieger Nicky Bertollo Manita Dangol John T.sheridan Madeleine M.Lowery eoin D.O’Cearbhaill UCD Centre for Biomedical Engineering University College DublinBelfieldDublin 4Ireland School of Mechanical&Materials Engineering University College DublinBelfieldDublin 4Ireland School of Electrical&Electronic Engineering University College DublinBelfieldDublin 4Ireland

We present a simple and customizable microneedle mold fabrication technique using a low-cost desktop SLA 3D *** opposed to conventional microneedle fabrication methods,this technique neither requires complex and expensive manufacturing facilities nor expertise in *** most low-cost 3D-printed microneedles to date display low aspect ratios and poor tip sharpness,we show that by introducing a two-step“Print&Fill”mold fabrication method,it is possible to obtain high-aspect ratio sharp needles that are capable of penetrating *** first the effect of varying design input parameters and print settings,it is shown that printed needles are always shorter than *** decreasing input height,needles also begin displaying an increasingly greater than specified needle base *** factors contribute to low aspect ratio needles when attempting to print submillimeter height *** setting input height tall enough,it is possible to print needles with high-aspect ratios and tip radii of 20–40μ*** tip sharpness is smaller than the specified printer ***,high-aspect ratio sharp needle arrays are printed in basins which are backfilled and cured in a second step,leaving sub-millimeter microneedles exposed resulting microneedle arrays which can be used as male *** female master molds are then formed from the fabricated microneedle *** the molds,both carboxymethyl cellulose loaded with rhodamine B as well as polylactic acid microneedle arrays are produced and their quality examined.A skin insertion study is performed to demonstrate the functional capabilities of arrays made from the fabricated *** method can be easily adopted by the microneedle research community for in-house master mold fabrication and parametric optimization of microneedle arrays.

关键词： needle cost printer

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