Coherent Two-Dimensional Nanoscopy

We introduce a spectroscopic method that determines nonlinear quantum mechanical response functions beyond the optical diffraction limit and allows direct imaging of nanoscale coherence. In established coherent two-dimensional (2D) spectroscopy, four-wave—mixing responses are measured using three in...

Full description

Saved in:
Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2011-09, Vol.333 (6050), p.1723-1726
Main Authors: Aeschlimann, Martin, Brixner, Tobias, Fischer, Alexander, Kramer, Christian, Melchior, Pascal, Pfeiffer, Walter, Schneider, Christian, Strüber, Christian, Tuchscherer, Philip, Voronine, Dmitri V.
Format: Article
Language:English
Subjects:
Coherence
Diffraction
Electron, positron and ion microscopes, electron diffractometers and related techniques
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Lasers
Lead
Nanocomposites
Nanomaterials
Nanoscience
Nanostructure
Nonlinear optics
Optical oscillators
Optics
Phase conjugation, optical mixing
photorefractive and kerr effects
Photoelectric emission
Photoelectrons
Physics
Plasmons
Quantum physics
Spatial resolution
Spectroscopy
Spectrum analysis
Two dimensional
Wave diffraction
Wave excitation
Wavelengths
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We introduce a spectroscopic method that determines nonlinear quantum mechanical response functions beyond the optical diffraction limit and allows direct imaging of nanoscale coherence. In established coherent two-dimensional (2D) spectroscopy, four-wave—mixing responses are measured using three ingoing waves and one outgoing wave; thus, the method is diffraction-limited in spatial resolution. In coherent 2D nanoscopy, we use four ingoing waves and detect the final state via photoemission electron microscopy, which has 50-nanometer spatial resolution. We recorded local nanospectra from a corrugated silver surface and observed subwavelength 2D line shape variations. Plasmonic phase coherence of localized excitations persisted for about 100 femtoseconds and exhibited coherent beats. The observations are best explained by a model in which coupled oscillators lead to Fano-like resonances in the hybridized dark- and bright-mode response.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1209206