CdSe single-nanoparticle based active tips for near-field optical microscopy

We present a method to realize active optical tips for use in near-field optics that can operate at room temperature. A metal-coated optical tip is covered with a thin polymer layer stained with CdSe nanocrystals or nanorods at low density. The time analysis of the emission rate of the active tips and the analysis of their emission spectra reveal that a very small number of particles—possibly down to only one—can be made active at the tip apex. This opens the way to optics with a single inorganic nanoparticle as a light source.

[1]  A. Pron,et al.  Chelating ligands for nanocrystals' surface functionalization. , 2004, Journal of the American Chemical Society.

[2]  A. Pron,et al.  Low polydispersity core/shell nanocrystals of CdSe/ZnSe and CdSe/ZnSe/ZnS type: preparation and optical studies , 2003 .

[3]  A. Dereux,et al.  Subwavelength mapping of surface photonic states , 2003 .

[4]  Lionel Aigouy,et al.  Local optical imaging of nanoholes using a single fluorescent rare-earth-doped glass particle as a probe , 2003 .

[5]  G. Dietler,et al.  Scanning near‐field optical microscopy using semiconductor nanocrystals as a local fluorescence and fluorescence resonance energy transfer source , 2003, Journal of microscopy.

[6]  L. Novotný,et al.  Multipolar interband absorption in a semiconductor quantum dot. II. Magnetic dipole enhancement , 2002 .

[7]  Peter Reiss,et al.  Highly Luminescent CdSe/ZnSe Core/Shell Nanocrystals of Low Size Dispersion , 2002 .

[8]  L. Novotný,et al.  Multipolar interband absorption in a semiconductor quantum dot. I. Electric quadrupole enhancement , 2002 .

[9]  A. P. Alivisatos,et al.  Epitaxial growth and photochemical annealing of graded CdS/ZnS shells on colloidal CdSe nanorods. , 2002, Journal of the American Chemical Society.

[10]  Xiaogang Peng,et al.  Nearly monodisperse and shape-controlled CdSe nanocrystals via alternative routes: nucleation and growth. , 2002, Journal of the American Chemical Society.

[11]  Robert Neuhauser,et al.  Blinking statistics in single semiconductor nanocrystal quantum dots , 2001 .

[12]  V. Sandoghdar,et al.  Diamond colour centres as a nanoscopic light source for scanning near‐field optical microscopy , 2001, Journal of microscopy.

[13]  Christopher B. Murray,et al.  Synthesis and Characterization of Monodisperse Nanocrystals and Close-Packed Nanocrystal Assemblies , 2000 .

[14]  J. Michaelis,et al.  Optical microscopy using a single-molecule light source , 2000, Nature.

[15]  Weidong Yang,et al.  Shape control of CdSe nanocrystals , 2000, Nature.

[16]  D. P. Fromm,et al.  Nonexponential “blinking” kinetics of single CdSe quantum dots: A universal power law behavior , 2000 .

[17]  Moungi G. Bawendi,et al.  Influence of Spectral Diffusion on the Line Shapes of Single CdSe Nanocrystallite Quantum Dots , 1999 .

[18]  F. Rossi,et al.  Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description , 1998, cond-mat/9812145.

[19]  M. Nirmal,et al.  Fluorescence intermittency in single cadmium selenide nanocrystals , 1996, Nature.