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arXiv · 2003.03089

Objective-free excitation of quantum emitters with a laser-written micro parabolic mirror

Sergii Morozov·Stefano Vezzoli·Ali Hossain Khan·Iwan Moreels·Riccardo Sapienza
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Abstract

The efficient excitation of quantum sources such as quantum dots or single molecules requires high NA optics which is often a challenge in cryogenics, or in ultrafast optics. Here we propose a 3.2 um wide parabolic mirror, with a 0.8 um focal length, fabricated by direct laser writing on CdSe/CdS colloidal quantum dots, capable of focusing the excitation light to a sub-wavelength spot and to extract the generated emission by collimating it into a narrow beam. This mirror is fabricated via in-situ volumetric optical lithography, which can be aligned to individual emitters, and it can be easily adapted to other geometries beyond the paraboloid. This compact solid-state transducer from far-field to the emitter has important applications in objective-free quantum technologies.

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Sergii Morozov, Stefano Vezzoli, Ali Hossain Khan, Iwan Moreels, Riccardo Sapienza. 2020-03-06. Objective-free excitation of quantum emitters with a laser-written micro parabolic mirror. https://doi.org/10.1063/5.0009975

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