Symmetry breaking enhanced near-field sensing with whispering gallery mode microresonators

利用回音壁模式微谐振器打破对称性增强近场传感

基本信息

  • 批准号:
    2012618
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Studentship
  • 财政年份:
    2017
  • 资助国家:
    英国
  • 起止时间:
    2017 至 无数据
  • 项目状态:
    已结题

项目摘要

Whispering gallery mode (wgm) microresonators have shown to be versatile platforms for various types of high-precision sensing due to their response to changes in their environment, such as magnetic, electric or gravitational fields, acceleration, temperature, or refractive index of surrounding media. Sensitivities close to the standard quantum limit have been demonstrated for optomechanical displacement and force sensors. This thesis covers the fundamental properties and effects observed in wgm resonators, outlines the principles of near-field sensing and the recently experimentally demonstrated nonlinear Kerr induced symmetry breaking observed wgm resonators with counter propagating fields.Theory indicates increased near-field sensitivity for a microresonator on the verge of the symmetry broken regime. This thesis has experimentally addressed this research question, presenting preliminary sensitivity results. The experiment investigated the cavity response of a symmetrically pumped high-Q silica rod resonator due to a sharp tungsten tip's perturbation within the wgm evanescent field. The tungsten tip distance from the microresonator was precisely controlled by a nanometre precision piezo stage. The reported experiment was affected by several slow noise sources, and therefore the tip was modulated to study the cavity response. Displacement spectral densities were calculated, and the lowest noise poor obtained was 0.65nmHz -1/2 for a 5s duration measurement. Signal-to-noise ratios were above 20dB. The noise floor in all measurements seemed to follow a 1 /f line, indicating that higher modulation frequencies will possibly have increased sensitivity and signal-to-noise ratio due to the low noise floor.Further experiments are needed to fully identify the dominant effect caused by the tungsten tip in the evanescent field of the resonator. The results presented in this report suggest it is primarily scattering and refractive index change induced. Experiments to determine the contributions from each effect are outlined. Future work also includes quantifying the sensitivity outside the symmetry breaking region to compare with the sensitivities reported here.
回音壁模式(wgm)微谐振器由于其对环境变化的响应,如磁场、电场或重力场、加速度、温度或周围介质的折射率,已被证明是各种类型的高精度传感的通用平台。接近标准量子极限的灵敏度已被证明为光机械位移和力传感器。本论文介绍了WGM谐振器的基本特性和效应,概述了近场传感的原理,以及最近实验证明的非线性Kerr诱导对称破缺的WGM谐振器,理论表明,在对称破缺区域的边缘,微谐振器的近场灵敏度增加。本论文已通过实验解决了这一研究问题,提出了初步的灵敏度结果。实验研究了对称泵浦的高Q石英棒谐振器在WGM倏逝场中尖钨针尖扰动下的谐振腔响应。钨针尖与微谐振器的距离由纳米级精密压电台精确控制。所报道的实验受到几个慢噪声源的影响,因此对尖端进行调制以研究腔响应。计算了位移谱密度,在5s时测得的最低噪声差为0.65nmHz-1/2。信噪比均在20 dB以上。所有测量中的本底噪声似乎都遵循1 /f线,这表明较高的调制频率可能会由于本底噪声较低而提高灵敏度和信噪比。本报告中提出的结果表明,它主要是散射和折射率变化引起的。实验,以确定从每个效果的贡献进行了概述。未来的工作还包括量化对称性破缺区域以外的灵敏度,以与这里报道的灵敏度进行比较。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Coherent suppression of backscattering in optical microresonators.
  • DOI:
    10.1038/s41377-020-00440-2
  • 发表时间:
    2020-12-23
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Svela AØ;Silver JM;Del Bino L;Zhang S;Woodley MTM;Vanner MR;Del'Haye P
  • 通讯作者:
    Del'Haye P
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其他文献

Internet-administered, low-intensity cognitive behavioral therapy for parents of children treated for cancer: A feasibility trial (ENGAGE).
针对癌症儿童父母的互联网管理、低强度认知行为疗法:可行性试验 (ENGAGE)。
  • DOI:
    10.1002/cam4.5377
  • 发表时间:
    2023-03
  • 期刊:
  • 影响因子:
    4
  • 作者:
  • 通讯作者:
Differences in child and adolescent exposure to unhealthy food and beverage advertising on television in a self-regulatory environment.
在自我监管的环境中,儿童和青少年在电视上接触不健康食品和饮料广告的情况存在差异。
  • DOI:
    10.1186/s12889-023-15027-w
  • 发表时间:
    2023-03-23
  • 期刊:
  • 影响因子:
    4.5
  • 作者:
  • 通讯作者:
The association between rheumatoid arthritis and reduced estimated cardiorespiratory fitness is mediated by physical symptoms and negative emotions: a cross-sectional study.
类风湿性关节炎与估计心肺健康降低之间的关联是由身体症状和负面情绪介导的:一项横断面研究。
  • DOI:
    10.1007/s10067-023-06584-x
  • 发表时间:
    2023-07
  • 期刊:
  • 影响因子:
    3.4
  • 作者:
  • 通讯作者:
ElasticBLAST: accelerating sequence search via cloud computing.
ElasticBLAST:通过云计算加速序列搜索。
  • DOI:
    10.1186/s12859-023-05245-9
  • 发表时间:
    2023-03-26
  • 期刊:
  • 影响因子:
    3
  • 作者:
  • 通讯作者:
Amplified EQCM-D detection of extracellular vesicles using 2D gold nanostructured arrays fabricated by block copolymer self-assembly.
使用通过嵌段共聚物自组装制造的 2D 金纳米结构阵列放大 EQCM-D 检测细胞外囊泡。
  • DOI:
    10.1039/d2nh00424k
  • 发表时间:
    2023-03-27
  • 期刊:
  • 影响因子:
    9.7
  • 作者:
  • 通讯作者:

的其他文献

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{{ truncateString('', 18)}}的其他基金

An implantable biosensor microsystem for real-time measurement of circulating biomarkers
用于实时测量循环生物标志物的植入式生物传感器微系统
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    2901954
  • 财政年份:
    2028
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    --
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    Studentship
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利用人类肠道微生物群的多糖分解能力来开发环境可持续的洗碗解决方案
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  • 财政年份:
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    --
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Likelihood and impact of severe space weather events on the resilience of nuclear power and safeguards monitoring.
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  • 财政年份:
    2027
  • 资助金额:
    --
  • 项目类别:
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质子、α 和 γ 辐照辅助应力腐蚀开裂:了解燃料-不锈钢界面
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Field Assisted Sintering of Nuclear Fuel Simulants
核燃料模拟物的现场辅助烧结
  • 批准号:
    2908917
  • 财政年份:
    2027
  • 资助金额:
    --
  • 项目类别:
    Studentship
Assessment of new fatigue capable titanium alloys for aerospace applications
评估用于航空航天应用的新型抗疲劳钛合金
  • 批准号:
    2879438
  • 财政年份:
    2027
  • 资助金额:
    --
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    Studentship
CDT year 1 so TBC in Oct 2024
CDT 第 1 年,预计 2024 年 10 月
  • 批准号:
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  • 财政年份:
    2027
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    --
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    Studentship
Developing a 3D printed skin model using a Dextran - Collagen hydrogel to analyse the cellular and epigenetic effects of interleukin-17 inhibitors in
使用右旋糖酐-胶原蛋白水凝胶开发 3D 打印皮肤模型,以分析白细胞介素 17 抑制剂的细胞和表观遗传效应
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Understanding the interplay between the gut microbiome, behavior and urbanisation in wild birds
了解野生鸟类肠道微生物组、行为和城市化之间的相互作用
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  • 财政年份:
    2027
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