Ultra-long-working-distance Spectroscopy of Single Nanostructures with Aspherical Solid Immersion Microlenses
ORAL
Abstract
In this work, we present aspherical micro-lenses which redirect emitted photons from semiconductor nanostructure into an ultra-narrow light cone of NA=0.016 - the outcoming light can be collected by a 1 inch-diameter lens at the distance of 590 mm from the sample [1]. The resulting working distance is more than 70 times longer than the one offered by conventional microscope objectives. Micro-lenses were fabricated by Two-Photon Polymerisation Direct Laser Writing (TPP-DLW), the technique which allows for three-dimensional printing of micro-objects made of transparent non-conductive resin that withstands cryogenic temperatures [2].
We demonstrate the usability of the proposed solid immersion lenses with single self-assembled quantum dots containing a single magnetic ion. Finally, we show that our solution works for monolayers of transition metal dichalcogenides (TMDs), in particular, MoSe2 and WSe2 thus confirming the feasibility of broadband operation of fabricated lenses. Presented micro-lenses could be especially useful for single nanostructure spectroscopy in very high magnetic fields - due to the absence of metal elements - as well as in microwave cavities or optical dilution refrigerator systems.
[1] Light Sci. Appl. 9, 48 (2020).
[2] Opt. Express 26, 11513 (2018).
We demonstrate the usability of the proposed solid immersion lenses with single self-assembled quantum dots containing a single magnetic ion. Finally, we show that our solution works for monolayers of transition metal dichalcogenides (TMDs), in particular, MoSe2 and WSe2 thus confirming the feasibility of broadband operation of fabricated lenses. Presented micro-lenses could be especially useful for single nanostructure spectroscopy in very high magnetic fields - due to the absence of metal elements - as well as in microwave cavities or optical dilution refrigerator systems.
[1] Light Sci. Appl. 9, 48 (2020).
[2] Opt. Express 26, 11513 (2018).
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Presenters
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Aleksander Bogucki
- University of Warsaw