Research Areas - (2) Single-Quantum-Dot Photon Statistics and Blinking Spectroscopy

Full path: Chemistry > Physical Chemistry > Single-Particle Imaging > Single-Quantum-Dot Photon Statistics and Blinking Spectroscopy

Thomas Basche 🔗
Johannes Gutenberg University Mainz 🔗
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Department(s)/lab(s): Department of Chemistry, Institute of Physical Chemistry | AK Basche - Single Molecule Spectroscopy @ JGU
Summary:

Basche is one of the founding figures of optical single-molecule spectroscopy. The group performs high-resolution fluorescence-excitation spectroscopy on single dibenzoterrylene (DBT) molecules in anthracene hosts at liquid-helium temperature, where zero-phonon lines approach the Fourier limit -- effectively a solid-state single-photon emitter with atom-like linewidths -- and studies how nanocrystal host engineering (e.g. electrohydrodynamic printing) preserves spectral stability, with polarization-resolved super-resolution imaging used to pin down crystal orientation. Further lines: photon-statistics and blinking in single quantum dots and QD/dye hybrids, and single-molecule studies of singlet fission, where photon-stream analysis of terrylenediimide dimers exposed coherent multiexciton superpositions that ensemble measurements average away. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), this is the molecular analogue of the colour-centre programme -- same photophysics toolkit (HBT, resonance fluorescence, orientation-resolved imaging), different emitter -- and it is the strongest single-emitter optics group in Mainz chemistry. Note: senior/long-established professor; confirm current group status and recruiting before applying.

Paul Mulvaney 🔗
University of Melbourne 🔗
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Department(s)/lab(s): School of Chemistry / Bio21 Institute | Mulvaney Nanoscience Laboratory @ UMelb
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Mulvaney directs the ARC Centre of Excellence in Exciton Science and runs Melbourne's nanoscience laboratory. The group's distinctive capability is single-particle and single-emitter optical spectroscopy: photon-antibunching and blinking statistics from individual quantum dots and perovskite nanocrystals, photothermal and dark-field spectroscopy of individual metal nanoparticles, and the electrochemical control of single-nanocrystal charge state. Applications run from LEDs and solar cells to quantum-dot probes for single-particle tracking in cells. Positioned against the established body of NV-ensemble quantum sensing work — DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity — his single-emitter photon-statistics measurements share the shot-noise-limited photon-counting methodology of NV-ensemble ODMR readout, and the group's nanocrystal probes are direct competitors/complements to nanodiamond in cellular sensing. Large, well-resourced group.