Devices of quantum photonics fabricated using Nanoimprint Lithography
Planar-concave microcavities provide longitudinal and transverse optical confinement but are challenging to fabricate. This work reports a new method to fabricate a more scalable monolithic planar-hemispherical cavity using polymers and the deposition of metal mirrors. The FIB-milled stamp with hemi...
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| Materiálatiipa: | Oahppočájánas |
| Giella: | English |
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2023
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| Čoahkkáigeassu: | Planar-concave microcavities provide longitudinal and transverse optical confinement but are challenging to fabricate. This work reports a new method to fabricate a more scalable monolithic
planar-hemispherical cavity using polymers and the deposition of metal mirrors. The FIB-milled
stamp with hemispherical features serves as the foundation for the nanoimprint lithography (NIL).
The feature size ranges from radii of curvature of 2µm to 10µm. The surface roughness of the feature is as low as 0.62 nm, measured by atomic force microscopy. Characterization of the optical
microcavity reveals clear and Laguerre-Gaussian modes and the results exhibited good agreement
with finite dimension time domain simulations. The resonance peak could be reliably controlled
through tailored fabrication design, thereby enabling the cavity’s adaptation to a specific single
emitter. These cavities are well-suited for quantum optics applications, including the detection
of individual atoms and the efficient generation of single photons. The cavity used for emittercavity coupling has a mode volume of 0.098 V/λ
<sup>3</sup> and resonance results in a decay time reduction
exceeding a factor of 2; it is evident that Purcell enhancement has occurred, opening exciting
opportunities for further research in this field.
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