Single molecule emission characteristics in near-field microscopy

Authors

Randy X. Bian
Robert C. Dunn
X. Sunney XieFollow
P.T. Leung, Portland State UniversityFollow

Published In

Physical Review Letters

Document Type

Article

Publication Date

12-1-1995

Subjects

Near-field microscopy, Fluorescence -- Measurement, Finite differences, Nanostructures -- Electric properties

Abstract

In near-field scanning optical microscopy (NSOM), the measured fluorescence lifetime of a single dye molecule can be shortened or lengthened, sensitively dependent on the relative position between the molecule and aluminum coated fiber tip. The modified lifetimes and other emission characteristics are simulated by solving Maxwell equations with the finite-difference time-domain (FDTD) method. The 2D computation reveals insight into the lifetime behaviors and provides guidance for nonperturbative spectroscopic measurements with NSOM. This new methodology is capable of predicting molecular emission properties in front of a metal/dielectric interface of arbitrary geometry.

Description

This is the publisher's final pdf. Article appears in Physical Review Letters (http://prl.aps.org/) and is copyrighted by APS Journals (http://publish.aps.org/).

DOI

10.1103/PhysRevLett.75.4772

Persistent Identifier

http://archives.pdx.edu/ds/psu/7659

Citation Details

Bian, R. X., Dunn, R. C., Xie, X. S., & Leung, P. T. (1995). Single molecule emission characteristics in near-field microscopy. Physical Review Letters, 75(26), 4772-4775.