用于远程折射率传感的量子点嵌入微球
Quantum dot-embedded microspheres for remote refractive index sensing.
作者信息
Pang Shuo, Beckham Richard E, Meissner Kenith E
出版信息
Appl Phys Lett. 2008 Jun 2;92(22):221108-2211083. doi: 10.1063/1.2937209. Epub 2008 Jun 3.
Abstract
We present a refractometric sensor based on quantum dot-embedded polystyrene microspheres. Optical resonances within a microsphere, known as whispering-gallery modes (WGMs), produce narrow spectral peaks. For sensing applications, spectral shifts of these peaks are sensitive to changes in the local refractive index. In this work, two-photon excited luminescence from the quantum dots couples into several WGMs within the microresonator. By optimizing the detection area, the spectral visibility of the WGMs is improved. The spectral shifts are measured as the surrounding index of the refraction changes. The experimental sensitivity is about five times greater than that predicted by the Mie theory.
摘要
我们展示了一种基于嵌入量子点的聚苯乙烯微球的折射传感器。微球内的光学共振，即回音壁模式（WGMs），会产生窄光谱峰。对于传感应用，这些峰的光谱位移对局部折射率的变化很敏感。在这项工作中，量子点的双光子激发发光耦合到微谐振器内的几个WGMs中。通过优化检测区域，WGMs的光谱可见性得到了改善。随着周围折射率的变化测量光谱位移。实验灵敏度比米氏理论预测的灵敏度大约高五倍。
相似文献
1
Quantum dot-embedded microspheres for remote refractive index sensing.
Appl Phys Lett. 2008 Jun 2;92(22):221108-2211083. doi: 10.1063/1.2937209. Epub 2008 Jun 3.
2
Whispering gallery mode biosensors consisting of quantum dot-embedded microspheres.
Ann Biomed Eng. 2009 Oct;37(10):1974-83. doi: 10.1007/s10439-009-9713-2. Epub 2009 May 22.
3
Toward Automatic Label-Free Whispering Gallery Modes Biodetection with a Quantum Dot-Coated Microsphere Population.
Nanoscale Res Lett. 2010 Feb 20;5(3):524-532. doi: 10.1007/s11671-010-9541-1.
4
Mode-Splitting for Refractive Index Sensing in Fluorescent Whispering Gallery Mode Microspheres with Broken Symmetry.
Sensors (Basel). 2018 Sep 7;18(9):2987. doi: 10.3390/s18092987.
5
Effect of surrounding inhomogeneities on whispering gallery modes in spherical resonators.
Appl Opt. 2013 Feb 1;52(4):690-7. doi: 10.1364/AO.52.000690.
6
Theoretical Analysis of the Refractometric Sensitivity of a Coated Whispering Gallery Mode Resonator for Gas Sensing Applications.
Sensors (Basel). 2022 Nov 25;22(23):9155. doi: 10.3390/s22239155.
7
Thermo-Optical Sensitivity of Whispering Gallery Modes in AsS Chalcogenide Glass Microresonators.
Sensors (Basel). 2022 Jun 20;22(12):4636. doi: 10.3390/s22124636.
8
Tunable whispering gallery mode emission from quantum-dot-doped microspheres.
Small. 2005 Feb;1(2):238-41. doi: 10.1002/smll.200400019.
9
Microcavity-Enhanced Fluorescence Energy Transfer from Quantum Dot Excited Whispering Gallery Modes to Acceptor Dye Nanoparticles.
ACS Nano. 2021 Jan 26;15(1):1445-1453. doi: 10.1021/acsnano.0c08772. Epub 2020 Dec 30.
10
Whispering gallery mode micro resonators for multi-parameter sensing applications.
Opt Express. 2018 Nov 26;26(24):31829-31838. doi: 10.1364/OE.26.031829.
引用本文的文献
1
Emergent Properties from Three-Dimensional Assemblies of (Nano)particles in Confined Spaces.
Cryst Growth Des. 2024 Apr 17;24(14):6060-6080. doi: 10.1021/acs.cgd.4c00260. eCollection 2024 Jul 17.
2
Droplet Lasers for Smart Photonic Labels.
ACS Appl Mater Interfaces. 2021 Nov 3;13(43):51485-51494. doi: 10.1021/acsami.1c14972. Epub 2021 Oct 20.
3
Review of biosensing with whispering-gallery mode lasers.
Light Sci Appl. 2021 Feb 26;10(1):42. doi: 10.1038/s41377-021-00471-3.
4
Whispering gallery mode sensors.
Adv Opt Photonics. 2015 Jun 30;7(2):168-240. doi: 10.1364/AOP.7.000168.
5
Label-free detection with high-Q microcavities: a review of biosensing mechanisms for integrated devices.
Nanophotonics. 2012 Dec;1(3-4):267-291. doi: 10.1515/nanoph-2012-0021. Epub 2012 Dec 6.
6
Optical sensors based on whispering gallery modes in fluorescent microbeads: size dependence and influence of substrate.
Sensors (Basel). 2009;9(9):6836-52. doi: 10.3390/s90906836. Epub 2009 Aug 31.
7
Optical microspherical resonators for biomedical sensing.
Sensors (Basel). 2011;11(1):785-805. doi: 10.3390/s110100785. Epub 2011 Jan 12.
8
Optical sensors based on whispering gallery modes in fluorescent microbeads: response to specific interactions.
Sensors (Basel). 2010;10(6):6257-74. doi: 10.3390/s100606257. Epub 2010 Jun 22.
9
Terahertz active photonic crystals for condensed gas sensing.
Sensors (Basel). 2011;11(6):6003-14. doi: 10.3390/s110606003. Epub 2011 Jun 3.
10
Toward Automatic Label-Free Whispering Gallery Modes Biodetection with a Quantum Dot-Coated Microsphere Population.
Nanoscale Res Lett. 2010 Feb 20;5(3):524-532. doi: 10.1007/s11671-010-9541-1.
本文引用的文献
1
Morphology-dependent resonance induced by two-photon excitation in a micro-sphere trapped by a femtosecond pulsed laser.
Opt Express. 2004 Sep 6;12(18):4198-202. doi: 10.1364/opex.12.004198.
2
Combining optical trapping and single-molecule fluorescence spectroscopy: enhanced photobleaching of fluorophores.
J Phys Chem B. 2004 May 20;108(20):6479-84. doi: 10.1021/jp049805+.
3
Evanescent wave excited luminescence from levitated quantum dot modified colloids.
Langmuir. 2007 Aug 14;23(17):8950-6. doi: 10.1021/la701012j. Epub 2007 Jul 17.
4
Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules.
Nat Biotechnol. 2001 Jul;19(7):631-5. doi: 10.1038/90228.
5
Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor.
J Am Chem Soc. 2001 Jan 10;123(1):183-4. doi: 10.1021/ja003633m.
6
Quantum dot bioconjugates for ultrasensitive nonisotopic detection.
Science. 1998 Sep 25;281(5385):2016-8. doi: 10.1126/science.281.5385.2016.
Zotero 插件