Top: Bright-field STEM and CL images of a 80 nm thick nanospiral. Middle: Schematic illustration of an electron beam (teal) exciting plasmons in nanodiamond that interact with NV centers, emitting correlated photons (yellow). Bottom: Researchers E. Dumitrescu, B. Lawrie, M. Feldman, and J. Hachtel with the CL microscope. (hi-res image)
Researchers from ORNL’s QIS group used CNMS nanofabrication capabilities to create samples that enable cathodoluminescence (CL) observations in a Scanning Transmission Electron Microscope (STEM).
Significance and Impact
The results enhance the integration of quantum emitters with plasmonic or nanophotonic structures, leading to chip-scale quantum state preparation.
–Plasmon modes in Archimedean nanospirals are imaged at the nanoscale using STEM-based CL.
–Strong photon correlations observed in nanodiamond CL and shown to be associated with the phonon sideband (not the NV0 zero-phonon line)
–CNMS patterned nanospirals and nanodiamond and fabricated the SiN membranes.
J. A. Hachtel et al, "Polarization- and wavelength-resolved near-field imaging of complex plasmonic modes in Archimedean nanospirals," Optics Lett.43, 927 (2018). DOI: 10.1364/OL.43.000927)
M. A. Feldman et al., "Colossal photon bunching in quasiparticle-mediated nanodiaomand cathodoluminescence," Phys. Rev. B, 97, 081404(R) (2018). DOI: 10.1103/PhysRevB.97.081404