JP2008500534A - 広帯域光源で励起される誘電体微小空洞蛍光センサ - Google Patents
広帯域光源で励起される誘電体微小空洞蛍光センサ Download PDFInfo
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- JP2008500534A JP2008500534A JP2007515078A JP2007515078A JP2008500534A JP 2008500534 A JP2008500534 A JP 2008500534A JP 2007515078 A JP2007515078 A JP 2007515078A JP 2007515078 A JP2007515078 A JP 2007515078A JP 2008500534 A JP2008500534 A JP 2008500534A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/648—Specially adapted constructive features of fluorimeters using evanescent coupling or surface plasmon coupling for the excitation of fluorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/29341—Loop resonators operating in a whispering gallery mode evanescently coupled to a light guide, e.g. sphere or disk or cylinder
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
Description
lλl=L (1)
ここでλ1は真空中でl番目のモードの波長であり、LはWGMの1周の光路長であり、lはモード番号と称される整数である。共振条件(1)を満足する導波路104からの光は微小共振器に効率的に結合される。微小共振器の共振モードは例えば、B.R.ジョンソン著「形態依存共振の理論:形状共振および幅の式(Theory of morphology-dependent resonances:shape resonances and width formulas)」、米国光学会雑誌A(Journal of the Optical Society of America A)10巻、p.343〜352(1993年)、およびJ.C.ナイトら「近接場プローブによる微小球内のウィスパリングギャラリモードのマッピング(Mapping whispering-gallery modes in microspheres with a near-field probe)」、米国学会誌(Optical Letters)20巻、p.1515〜1517(1995年)にさらに記載されている。
FSR=Δυ=c/L≒c/(πnD) (2)
ここでcは真空中の光速であり、nは微小空洞の屈折率であり、Dは円筒径、およびnπDはEWGMの1周の光路長を近似する。l番目および(l+1)番目のモードは、隣接EWGMモードとも称され得る。
FSR(波長)=Δυλ2/c=λ2/(πnD) (3)
ここでλは真空中の光の波長である。ここでFSRの両方の記述は交換的に用いられる。
FSR(波長)=Δυλ2/c=λ2/(πnD) (3)
ここでcは真空中の光速であり、λは真空中の光の波長であり、nは微小空洞の屈折率であり、Dはほぼ球状微小空洞の直径を近似する。実験で用いられた微小空洞の場合、FSRはおよそ580pmであった。
Claims (29)
- 周波数が自由スペクトル領域(FSR)により分離される赤道ウィスパリングギャラリモード(EWGM)を規定する微小空洞共振器であって、前記EWGMが微小空洞共振器軸に垂直な平面にあり、
光を前記微小空洞共振器内に入射するように光学的に結合された光源であって、前記光源が帯域がEWGMのFSRとほぼ等しいかまたはそれを超える出力スペクトルを有する出力光を生成する、
を有することを特徴とする微小共振器センサ装置。 - 前記微小空洞がバルジ状微小空洞共振器を有する、請求項1に記載の装置。
- 前記バルジ状微小空洞共振器が軸に沿って細長く、前記光源からの前記出力光を前記微小空洞共振器に結合する導波路をさらに有する、請求項2に記載の装置。
- 前記光源からの光を前記微小空洞共振器に結合するように配置された第1の光導波路をさらに有する、請求項1に記載の装置。
- 前記第1の光導波路が先細光ファイバを有する、請求項4に記載の装置。
- 前記第1の光導波路が基板上に平面導波路を有する、請求項4に記載の装置。
- 前記第1の微小空洞共振器に関連する光を検出するように配置された少なくとも第1の光検出器をさらに有する、請求項4に記載の装置。
- 前記第1の光検出器が、前記微小空洞共振器から前記第1の光導波路に沿って伝播する光を受け取るように光学的に結合されている、請求項7に記載の装置。
- 前記第1の光検出器が前記微小空洞共振器に近接して配置されて、前記微小空洞共振器から自由空間内を伝播する光を検出する、請求項7に記載の装置。
- 前記微小空洞共振器に光学的に結合された第2の光導波路をさらに有し、前記第1の光検出器が前記微小空洞共振器から前記第2の光導波路に沿って伝播する光を受け取るように光学的に結合されている、請求項7に記載の装置。
- 前記第1の光検出器に伝播する光を波長選択するように配置された波長選択素子をさらに有する、請求項7に記載の装置。
- 前記光源が半導体レーザを有する、請求項1に記載の装置。
- 前記光源が発光ダイオードを有する、請求項1に記載の装置。
- 前記帯域が少なくとも前記FSRの5倍と等しい、請求項1に記載の装置。
- 前記帯域が少なくとも前記FSRの10倍と等しい、請求項1に記載の装置。
- 励起光を第1の微小空洞共振器内に結合し、前記第1の微小空洞共振器が赤道ウィスパリングギャラリモード(EWGM)を規定し且つ前記励起光が少なくとも2つの隣接EWGM内に結合可能であるように十分に広い帯域を有するものであり、
前記第1の微小空洞共振器内に結合された前記励起光を用いて1つまたは複数の蛍光物質を励起し、
前記1つまたは複数の蛍光物質の蛍光発光から生じる蛍光信号を検出する、
ことを有する蛍光測定方法。 - 前記励起光の結合が、光源を用いて前記励起光を生成することと、前記励起光を前記光源から光導波路を介して前記微小空洞共振器へ通過させることを含む、請求項16に記載の方法。
- 前記励起光の生成が、レーザ内で前記励起光を生成することを含む、請求項17に記載の方法。
- 前記励起光の生成が、発光ダイオード内で前記励起光を生成することを含む、請求項17に記載の方法。
- 前記光導波路が先細ファイバを有する、請求項17に記載の方法。
- 前記光導波路が基板上に平面導波路を有する、請求項17に記載の方法。
- 前記蛍光信号の検出が、前記微小空洞共振器から自由空間内を伝播する光を検出することを含む、請求項16に記載の方法。
- 前記蛍光信号の検出前に、前記蛍光信号を光学的に濾波することをさらに有する、請求項16に記載の方法。
- 前記光源が半導体レーザを有する、請求項16に記載の方法。
- 検体を前記微小共振器空洞に付着させることをさらに有し、前記蛍光物質が前記検体と関連している、請求項16に記載の方法。
- 前記検体を前記微小共振器空洞に付着させる前に、前記蛍光物質を前記検体に付着させることをさらに有する、請求項25に記載の方法。
- 前記検体を前記微小共振器空洞に付着させた後に、前記蛍光物質を前記検体に付着させることをさらに有する、請求項25に記載の方法。
- 前記励起光が、少なくとも5個の隣接EWGM内に結合可能であるように十分に広い帯域を有する、請求項16に記載の方法。
- 前記励起光が、少なくとも10個の隣接EWGM内に結合可能であるように十分に広い帯域を有する、請求項16に記載の方法。
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US10/854,911 US7271379B2 (en) | 2004-05-27 | 2004-05-27 | Dielectric microcavity fluorosensors excited with a broadband light source |
PCT/US2005/012744 WO2005119217A1 (en) | 2004-05-27 | 2005-04-15 | Dielectric microcavity fluorosensors excited with a broadband light source |
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JP2008500534A true JP2008500534A (ja) | 2008-01-10 |
JP2008500534A5 JP2008500534A5 (ja) | 2008-06-05 |
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EP (1) | EP1751522A1 (ja) |
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US7622705B2 (en) | 2009-11-24 |
US20070284513A1 (en) | 2007-12-13 |
CN1961206A (zh) | 2007-05-09 |
US7271379B2 (en) | 2007-09-18 |
EP1751522A1 (en) | 2007-02-14 |
US20070114364A1 (en) | 2007-05-24 |
WO2005119217A1 (en) | 2005-12-15 |
US20050263679A1 (en) | 2005-12-01 |
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