Combined metallic nano-rings and solid-immersion lenses for bright emission from single InAs/GaAs quantum dots

Trojak, Oliver and Woodhead, Christopher Stephen and Park, Suk-In and Dong Song, Jin and Young, Robert James and Sapienza, Luca (2018) Combined metallic nano-rings and solid-immersion lenses for bright emission from single InAs/GaAs quantum dots. Applied Physics Letters, 112: 221102. 221102-1-221102-4. ISSN 0003-6951

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Solid-state single-photon emitters are key components for integrated quantum photonic devices. However, they can suffer from poor extraction efficiencies, caused by the large refractive index contrast between the bulk material they are embedded in and air: this results in a small fraction (that can be as low as ﰀ0.1%) of the emitted photons reaching free-space collection optics. To overcome this issue, we present a device that combines a metallic nano-ring, positioned on the sam- ple surface and centered around the emitter, and an epoxy-based super-solid immersion lens, depos- ited above the ring devices. We show that the combined broadband lensing effect of the nano-ring and the super-solid immersion lens significantly increases the extraction of light emitted by single InAs/GaAs quantum dots into free space: we observe cumulative enhancements that allow us to estimate photon fluxes on the first collecting lens approaching 106 counts per second, from a single quantum dot in bulk. The combined broad-band enhancement in the extraction of light can be implemented with any kind of classical and quantum solid-state emitter and opens the path to the realisation of scalable bright devices. The same approach can also be implemented to improve the absorption of light, for instance, for small-area broadband photo-detectors.

Item Type:
Journal Article
Journal or Publication Title:
Applied Physics Letters
Additional Information:
Copyright 2018 American Institute of Physics. The following article appeared in Applied Physics Letters, 112, 2018 and may be found at This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Uncontrolled Keywords:
?? transition metalssemiconductorsquantum dotsoptical propertiesphotodetector photonicslensesoptical microscopyluminescencequantum solidsphysics and astronomy (miscellaneous) ??
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Deposited On:
02 May 2018 08:52
Last Modified:
08 Apr 2024 23:58