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Physikalische Gesellschaft Zürich
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Lead halide perovskite nanocrystals (LHP NCs) are the first non-epitaxial semiconductor-based quantum emitters to exhibit excitonic coherence on timescales comparable to their radiative lifetimes. Their excitonic fine structure can be engineered through shape anisotropy to yield a nearly ideal, Fourier-transform-limited two-level system. The giant oscillator-strength effect results in fast emission down to 60 ps while maintaining single-photon emission. Superlattices of LHP NCs exhibit a collective ultrafast emission – superfluorescence – previously unseen in conventional solid-state materials. By simple near-field coupling of highly chiral plasmonic nanostructures, LHP NCs become the first fully chiral colloidal single-photon emitters.
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Physikalische Gesellschaft Zürich E-Mail: pgz_info at pgz.ch Web: http://www.pgz.ch |
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