Optomechanical crystals for spatial sensing of submicron sized particles.
Optomechanical crystals for spatial sensing of submicron sized particles.
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DOI：
10.1038/s41598-021-87558-4
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发表时间：
2021-04-09
影响因子：
4.6
通讯作者：
Fytas G
中科院分区：
文献类型：
--
作者：
Navarro-Urrios D;Kang E;Xiao P;Colombano MF;Arregui G;Graczykowski B;Capuj NE;Sledzinska M;Sotomayor-Torres CM;Fytas G
光学机械晶体腔(OMC)在检测和间接分析蛋白质、细菌和病毒等生物微粒方面具有广阔的应用前景。在这项工作中，我们通过光学监测热激活机械模式的频移来演示OMCs作为亚微米颗粒传感器在环境条件下的工作原理。谐振器是专门设计的，以便腔区支持特定的低模式体积机械模式，通常称为-收缩模式-。这些只涉及几个相邻腔室的振荡，这些腔室对谐振器其他部分的微扰相对不敏感。这些模式的本征频率随着变形局部化而减小，越靠近谐振器中心。因此，通过识别经历充分超过机械线宽的频移的特定模式，可以推断是否有粒子沉积在谐振器上，有多少粒子及其在腔区内的大致位置。有机化合物在检测和间接分析生物颗粒方面有着丰富的前景，如蛋白质、病毒和细菌。
Optomechanical crystal cavities (OMC) have rich perspectives for detecting and indirectly analysing biological particles, such as proteins, bacteria and viruses. In this work we demonstrate the working principle of OMCs operating under ambient conditions as a sensor of submicrometer particles by optically monitoring the frequency shift of thermally activated mechanical modes. The resonator has been specifically designed so that the cavity region supports a particular family of low modal-volume mechanical modes, commonly known as -pinch modes-. These involve the oscillation of only a couple of adjacent cavity cells that are relatively insensitive to perturbations in other parts of the resonator. The eigenfrequency of these modes decreases as the deformation is localized closer to the centre of the resonator. Thus, by identifying specific modes that undergo a frequency shift that amply exceeds the mechanical linewidth, it is possible to infer if there are particles deposited on the resonator, how many are there and their approximate position within the cavity region. OMCs have rich perspectives for detecting and indirectly analysing biological particles, such as proteins, viruses and bacteria.
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影响因子：
16.6
作者：
Yu W;Jiang WC;Lin Q;Lu T
通讯作者：
Lu T
影响因子：
4.6
作者：
Leijssen R;Verhagen E
通讯作者：
Verhagen E
影响因子：
38.3
作者：
Li, Mo;Tang, H. X.;Roukes, M. L.
通讯作者：
Roukes, M. L.
影响因子：
64.8
作者：
Eichenfield, Matt;Camacho, Ryan;Painter, Oskar
通讯作者：
Painter, Oskar
影响因子：
8.6
作者：
Kippenberg, TJ;Rokhsari, H;Vahala, KJ
通讯作者：
Vahala, KJ