Scanning near-field optical microscopy of quantum dots in photonic crystal cavities

Skacel, Matthias; Prancardi, Marco; Gerardino, A.; Alloing, Blandine; Li, Lianhe; Fiore, Andrea

doi:10.1088/1742-6596/245/1/012040

Cited by 2 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical spectroscopy on single quantum dots has been achieved, for example, by microphotoluminescence , measurements, and coherent spectroscopy employing aperture-based near-field microscopes. Furthermore, scattering-type near-field microscopy has been employed to study interband transitions in Ge and InAs quantum dots. Apart from interband transitions of confined charge carriers, also the intersublevel transitions of electrons and holes within the conduction or valence band are of interest both from basic science and application-oriented viewpoints.…”

mentioning

confidence: 99%

Intersublevel Spectroscopy on Single InAs-Quantum Dots by Terahertz Near-Field Microscopy

et al. 2012

View full text Add to dashboard Cite

Using scattering-type near-field infrared microscopy in combination with a free-electron laser, intersublevel transitions in buried single InAs quantum dots are investigated. The experiments are performed at room temperature on doped self-assembled quantum dots capped with a 70 nm GaAs layer. Clear near-field contrast of single dots is observed when the photon energy of the incident beam matches intersublevel transition energies, namely the p-d and s-d transition of conduction band electrons confined in the dots. The observed room-temperature line width of 5-8 meV of these resonances in the mid-infrared range is significantly below the inhomogeneously broadened spectral lines of quantum dot ensembles. The experiment highlights the strength of near-field microspectroscopy by demonstrating signals from bound-to-bound transitions of single electrons in a probe volume of the order of (100 nm)(3).

show abstract

mentioning

confidence: 99%

Intersublevel Spectroscopy on Single InAs-Quantum Dots by Terahertz Near-Field Microscopy

et al. 2012

View full text Add to dashboard Cite

show abstract

“…22, 69 and 70. Analysis of the literature shows that this problem, albeit difficult, can be solved and a few research groups have previously discussed how low temperature SNOM devices [72][73][74] look suitable for the task. In our case, we plan to use the recently constructed and available for joint work SNOM, 75,76 whose construction is rather similar to our SNOM.…”

Section: Single Molecule Coherent Fret Snom At Liquid Helium Temperat...mentioning

confidence: 99%

Single molecule fluorescence resonance energy transfer scanning near-field optical microscopy: potentials and challenges

et al. 2015

View full text Add to dashboard Cite

A few years ago, single molecule Fluorescence Resonance Energy Transfer Scanning Near-Field Optical Microscope (FRET SNOM) images were demonstrated using CdSe semiconductor nanocrystal-dye molecules as donor-acceptor pairs. Corresponding experiments reveal the necessity to exploit much more photostable fluorescent centers for such an imaging technique to become a practically used tool. Here we report the results of our experiments attempting to use nitrogen vacancy (NV) color centers in nanodiamond (ND) crystals, which are claimed to be extremely photostable, for FRET SNOM. All attempts were unsuccessful, and as a plausible explanation we propose the absence (instability) of NV centers lying close enough to the ND border. We also report improvements in SNOM construction that are necessary for single molecule FRET SNOM imaging. In particular, we present the first topographical images of single strand DNA molecules obtained with fiber-based SNOM. The prospects of using rare earth ions in crystals, which are known to be extremely photostable, for single molecule FRET SNOM at room temperature and quantum informatics at liquid helium temperatures, where FRET is a coherent process, are also discussed.

show abstract

Scanning near-field optical microscopy of quantum dots in photonic crystal cavities

Cited by 2 publications

References 6 publications

Intersublevel Spectroscopy on Single InAs-Quantum Dots by Terahertz Near-Field Microscopy

Intersublevel Spectroscopy on Single InAs-Quantum Dots by Terahertz Near-Field Microscopy

Single molecule fluorescence resonance energy transfer scanning near-field optical microscopy: potentials and challenges

Contact Info

Product

Resources

About