Optical Tweezers at Long Range and High Pressure (Creativity @ Home)

远距离高压光镊（创意@家庭）

• 批准号: EP/I034726/1
• 负责人: Miles Padgett
• 金额: $ 10.23万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2011
• 资助国家: 英国
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FI034726%2F1
• 关键词: Optical; Tweezers; Long; Range; Pressure

Optical tweezers move microscopic objects around using nothing more than the gentle touch of light itself. For over 20 years scientists have used optical tweezers to explore the small forces in nature - to watch and measure the motion of individual cells, bacteria and biomotors on a piconewton/nanometre scale. One problem with tweezers is that they require very powerful lenses meaning that the optical trap is usually less than a millimetre from the lens itself. This short range of the optical tweezers limits their application and it is this limitation we seek to overcome.Jointly with some of our international collaborators we will build a portable technology demonstrator where the trapping point can be a few mm above a simple mirror and 10mm away from the lens. We have just shown that these mirror traps can be electronically enhanced to give similar performance to a traditional tweezers.Again with our collaborators we wish to illustrate how such a system can allow science that is beyond the range of traditional systems. For example we will show optical trapping within an ultra-high pressure cell, which typically have diamond windows too thick for traditional systems. We will trap at pressure up to 1GigaPascal exploring the strange changes in resulting viscosity and, for example, look at whether bacteria can still swim. We will use the increased optical access to measure optical forces from first principles - addressing the age old dilemma of how much force a light beam really produces.This project was identified through creativity @ home from across the extend group with a project plan that was similarly devised.

光镊仅仅利用光本身的温和接触来移动微观物体。20多年来，科学家们一直使用光镊来探索自然界中的微小力量-在微微牛顿/纳米尺度上观察和测量单个细胞，细菌和生物运动。镊子的一个问题是，它们需要非常强大的透镜，这意味着光学陷阱通常距离透镜本身不到一毫米。光镊的这种短距离限制了它们的应用，而正是这种限制我们寻求克服。我们将与我们的一些国际合作者一起建立一个便携式技术演示器，其中捕获点可以在简单的镜子上方几毫米处，距离透镜10毫米。我们刚刚展示了这些镜面陷阱可以通过电子增强来获得与传统镊子相似的性能。我们希望再次与我们的合作者一起说明这样的系统如何能够实现超出传统系统范围的科学。例如，我们将展示超高压单元内的光学捕获，该单元通常具有对于传统系统来说太厚的金刚石窗口。我们将在高达1千兆帕斯卡的压力下捕获，探索由此产生的粘度的奇怪变化，例如，看看细菌是否仍然可以游泳。我们将使用增加的光学通道从第一原理测量光学力-解决光束真正产生多大力的古老难题。这个项目是通过creativity @ home从整个扩展组中确定的，项目计划也是类似设计的。

项目成果

Deep learning for real-time single-pixel video.

• DOI: 10.1038/s41598-018-20521-y
• 发表时间: 2018-02-05
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Higham CF;Murray-Smith R;Padgett MJ;Edgar MP
• 通讯作者: Edgar MP

Optimisation of a low cost SLM for diffraction efficiency and ghost order suppression

• DOI: 10.1140/epjst/e2011-01510-4
• 发表时间: 2011-12
• 期刊: The European Physical Journal Special Topics
• 作者: R. Bowman;V. D’Ambrosio;E. Rubino;O. Jedrkiewicz;P. Trapani;M. Padgett

Efficient generation of Bessel beam arrays by means of an SLM

• DOI: 10.1140/epjst/e2011-01511-3
• 发表时间: 2011-11-01
• 期刊: EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
• 影响因子: 2.8
• 作者: Bowman, R.;Muller, N.;Padgett, M. J.
• 通讯作者: Padgett, M. J.