Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities

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	Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities
其他题名	Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities
	VOLLMER, FRANK; TOPOLANCIK, JURAJ
	2009-09-24
专利权人	PRESIDENT AND FELLOWS OF HARVARD COLLEGE
公开日期	2009-09-24
授权国家	美国
专利类型	发明申请
摘要	The use of optical microcavities, high-Q resonators and slow-light structures as tools for detecting molecules and probing conformations and measuring polarizability and anisotropy of molecules and molecular assemblies using a pump-probe approach is described. Resonances are excited simultaneously or sequentially with pump and probe beams coupled to the same microcavity, so that a pump beam wavelength can be chosen to interact with molecules adsorbed to the microcavity surface, whereas a probe beam wavelength can be chosen to non-invasively measure pump-induced perturbations. The induced perturbations are manifest due to changes of resonance conditions and measured from changes in transfer characteristics or from changes of the scattering spectra of a microcavity-waveguide system. The perturbations induced by the pump beam may be due to polarizability changes, changes in molecular conformation, breakage or formation of chemical bonds, triggering of excited states, and formation of new chemical species. Furthermore, heat may be generated due to absorption of the pump beam. Furthermore, the use resonant modes with different states of polarization allows for measurements of polarizability and its anisotropy in samples interacting with the optical device.
其他摘要	描述了使用光学微腔，高Q谐振器和慢光结构作为检测分子和探测构象以及使用泵 - 探针方法测量分子和分子组件的极化性和各向异性的工具。通过耦合到同一微腔的泵浦和探测光束同时或依次激发共振，从而可以选择泵浦光束波长与吸附到微腔表面的分子相互作用，而可以选择探测光束波长来非侵入性地测量泵浦引起的扰动。由于共振条件的变化并且由传递特性的变化或微腔 - 波导系统的散射光谱的变化测量，所引起的扰动是明显的。由泵浦束引起的扰动可能是由于极化率变化，分子构象的变化，化学键的断裂或形成，激发态的触发以及新化学物质的形成。此外，由于吸收泵浦光束可能产生热量。此外，使用具有不同偏振态的谐振模式允许测量与光学器件相互作用的样品中的极化率及其各向异性。
主权项	An optical device comprising: a high-Q resonant structure; and one of an interface, a surface and a mode volume accessible for interactions with a sample; wherein resonant modes are excited in said high-Q structure at none, one or more pump wavelengths and at one or more probe wavelengths; and wherein said resonant modes are excited simultaneously or sequentially.
申请日期	2007-09-15
专利号	US20090237666A1
专利状态	授权
申请号	US12/441159
公开（公告）号	US20090237666A1
IPC 分类号	G01N21/00 \| G02B6/26 \| G02B6/00
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/53962
专题	半导体激光器专利数据库
作者单位	PRESIDENT AND FELLOWS OF HARVARD COLLEGE
推荐引用方式 GB/T 7714	VOLLMER, FRANK,TOPOLANCIK, JURAJ. Methods and devices for measurements using pump-probe spectroscopy in high-q microcavities. US20090237666A1[P]. 2009-09-24.