Fig. 1: An organic-inorganic hybrid integrated quantum photonic platform and the experimental setup.
a Schematic illustration of the platform consisting of a Si3N4-based photonic backbone and a crystalline anthracene (AC) nanosheet containing single dibenzoterrylene (DBT) molecules with dipole orientations aligned. The sample is excited from space and the emitted single photons are coupled to the waveguide, beam spilt through the MMI coupler and routed to the grating couplers (GC1 and GC2) for detection. Upper-right inset: Simplified Jabłoński diagram for relevant excitation and fluorescence processes. Lower-right inset: electric field distribution of the TE0 mode of the waveguide. b Optical micrographs showing the pick-and-place hybrid integration with the crystal orientation aligned with the waveguides. The white arrow denotes the “b” axis of the crystal. c Optical setup for the experiment (Supplementary Note 3). BS beamsplitter, AL aspheric lens, PE/D polarizer for excitation/detection, FM flip mirror, PH-F pinhole in Fourier plane, PH-R pinhole in real image plane, LPF long-pass filter for Stokes-shifted fluorescence, BPF narrow band-pass filter for resonance fluorescence, APD avalanche photodiode single photon detector.
