Colloidal Quantum Dots as Probes of Excitation Field Enhancement in Photonic Antennas

被引：31

作者：

Aouani, Heykel ^{[1
]}

Itzhakov, Stella ^{[2
]}

Gachet, David ^{[1
]}

Devaux, Eloise ^{[3
]}

Ebbesen, Thomas W. ^{[3
]}

Rigneault, Herve ^{[1
]}

Oron, Dan ^{[2
]}

Wenger, Jerome ^{[1
]}

机构：

[1] Aix Marseille Univ, Ecole Cent Marseille, CNRS, Inst Fresnel, F-13397 Marseille, France

[2] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel

[3] Univ Strasbourg, CNRS, Inst Sci & Ingn Supramol, F-67000 Strasbourg, France

来源：

ACS NANO | 2010年 / 4卷 / 08期

基金：

欧洲研究理事会;

关键词：

colloidal quantum dots; plasmonics; nanoantennas; microspheres; metal nanoapertures; fluorescence enhancement; Auger recombination; SINGLE-MOLECULE FLUORESCENCE; LIGHT; CONFINEMENT; PLASMONICS; EMISSION;

D O I：

10.1021/nn1009209

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Optical antennas are essential devices to interface light to nanoscale volumes and locally enhance the electromagnetic intensity. Various experimental methods can be used to quantify the antenna amplification on the emission process, yet characterizing the antenna amplification at the excitation frequency solely is a challenging task. Such experimental characterization is highly needed to fully understand and optimize the antenna response. Here, we describe a novel experimental tool to directly measure the antenna amplification on the excitation field independently of the emission process. We monitor the transient emission dynamics of colloidal quantum dots and show that the ratio of doubly to singly excited state photoluminescence decay amplitudes is an accurate tool to quantify the local excitation intensity amplification. This effect is demonstrated on optical antennas made of polystyrene microspheres and gold nanoapertures, and supported by numerical computations. The increased doubly excited state formation on nanoantennas realizes a new demonstration of enhanced light-matter interaction at the nanoscale.

引用

页码：4571 / 4578

页数：8

共 30 条

[1] Semiconductor clusters, nanocrystals, and quantum dots [J].

Alivisatos, AP .

SCIENCE, 1996, 271 (5251) :933-937

[2] Crucial Role of the Adhesion Layer on the Plasmonic Fluorescence Enhancement [J].

Aouani, Heykel ;

Wenger, Jerome ;

Gerard, Davy ;

Rigneault, Herve ;

Devaux, Eloise ;

Ebbesen, Thomas W. ;

Mahdavi, Farhad ;

Xu, Tingjun ;

Blair, Steve .

ACS NANO, 2009, 3 (07) :2043-2048

[3]

Atwater HA, 2010, NAT MATER, V9, P205, DOI [10.1038/nmat2629, 10.1038/NMAT2629]

[4] Optical sectioning by multiexcitonic ladder climbing in colloidal quantum dots [J].

Ben-Haim, Nir R. ;

Oron, Dan .

OPTICS LETTERS, 2008, 33 (18) :2089-2091

[5] Optical Antennas [J].

Bharadwaj, Palash ;

Deutsch, Bradley ;

Novotny, Lukas .

ADVANCES IN OPTICS AND PHOTONICS, 2009, 1 (03) :438-483

[6] Spectral and dynamical characterization of multiexcitons in colloidal CdSe semiconductor quantum dots [J].

Bonati, C ;

Mohamed, MB ;

Tonti, D ;

Zgrablic, G ;

Haacke, S ;

van Mourik, F ;

Chergui, M .

PHYSICAL REVIEW B, 2005, 71 (20)

[7] Excitation enhancement of CdSe quantum dots by single metal nanoparticles [J].

Chen, Yeechi ;

Munechika, Keiko ;

Jen-La Plante, Ilan ;

Munro, Andrea M. ;

Skrabalak, Sara E. ;

Xia, Younan ;

Ginger, David S. .

APPLIED PHYSICS LETTERS, 2008, 93 (05)

[8] Three-dimensional subwavelength confinement of light with dielectric microspheres [J].

Devilez, Alexis ;

Bonod, Nicolas ;

Wenger, Jerome ;

Gerard, Davy ;

Stout, Brian ;

Rigneault, Herve ;

Popov, Evgeny .

OPTICS EXPRESS, 2009, 17 (04) :2089-2094

[9] Room-temperature ordered photon emission from multiexciton states in single CdSe core-shell nanocrystals [J].

Fisher, B ;

Caruge, JM ;

Zehnder, D ;

Bawendi, M .

PHYSICAL REVIEW LETTERS, 2005, 94 (08)

[10] Multiexciton fluorescence from semiconductor nanocrystals [J].

Fisher, B ;

Caruge, JM ;

Chan, YT ;

Halpert, J ;

Bawendi, MG .

CHEMICAL PHYSICS, 2005, 318 (1-2) :71-81

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