Integration of fluorescent nanoparticles into photonic resonators is crucial for on-chip integration and applications in nanophotonics and quantum technologies. In this work we demonstrate a cavity design with a pocket at its center to host fluorescent nanoparticles. Simulations show that filling the pocket with a particle drastically reduces the mode volume to ~ 0.015 (λ/n)3 and strongly increases the field overlap of the fluorescent material with the cavity mode thus achieving more efficient coupling. We then demonstrate a method to fabricate dielectric cavities that naturally form a nano-pocket during the processing steps. Finally, the functionality of devices with and without particle in the pocket are directly compared. We show a PL enhancement by a factor of 20 and 2.5-fold lifetime reduction at room temperature versus 3.5 PL enhancement and 1.7 lifetime reduction for cavities with particle in a pocket and particle outside a pocket, respectively.
We report second harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109 layers. Surprisingly, the resulting signal is stronger when compared to previously reported few-layer experiments that showed the SHG efficiency gradually decreasing with the increasing thickness. This confirms that thick hBN flakes can serve as a platform for nonlinear optics, which is useful because thick flakes are easy to exfoliate while retaining a large flake size. We also show spatial second harmonic maps revealing that SHG remains a useful tool for the characterization of the layer structure even in the case of a large number of layers.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.