Journal
NANO LETTERS
Volume 18, Issue 3, Pages 1801-1806Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b05016
Keywords
Quantum dots; resonant transmission; few-photon nonlinearity; transform-limited linewidth; nanobeam waveguide; nanophotonics
Categories
Funding
- European Research Council (ERC Advanced Grant SCALE)
- Innovation Fund Denmark (Quantum Innovation Center Qubiz)
- Danish Council for Independent Research
- DFG [SFB ICRC-TRR 160]
- BMBF-Q.com-H [16KIS0109]
- NCCR QSIT
- SNF [200020_175748]
- Swiss National Science Foundation (SNF) [200020_175748] Funding Source: Swiss National Science Foundation (SNF)
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Establishing a highly efficient photon-emitter interface where the intrinsic linewidth broadening is limited solely by spontaneous emission is a key step in quantum optics. It opens a pathway to coherent light matter interaction for, e.g., the generation of highly indistinguishable photons, few photon optical nonlinearities, and photon-emitter quantum gates. However, residual broadening mechanisms are ubiquitous and need to be combated. For solid-state emitters charge and nuclear spin noise are of importance, and the influence of photonic nanostructures on the broadening has not been clarified. We present near-lifetime-limited linewidths for quantum dots embedded in nanophotonic waveguides through a resonant transmission experiment. It is found that the scattering of single photons from the quantum dot can be obtained with an extinction of 66 +/- 4%, which is limited by the coupling of the quantum dot to the nanostructure rather than the linewidth broadening. This is obtained by embedding the quantum dot in an electrically contacted nanophotonic membrane. A clear pathway to obtaining even larger single-photon extinction is laid out; i.e., the approach enables a fully deterministic and coherent photon-emitter interface in the solid state that is operated at optical frequencies.
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