Presentation by Falko Schmidt on "Integrated Photonics for single photon microscopy"

June 13, 2022

Falko Schmidt is presenting preliminary work on integrated photonics at the Humboldt-meets-Leibniz (HmL) networking meeting in Hannover, Germany. 

The HmL meeting takes places between the 11th till 13th of June at the Xplanatorium at Herrenhäuser Gärten in Hannover. It is a unique opportunity to meet fellow young scientists and connect with Humboldt award winners to discuss the future of science and get valuable insights into academia and industry careers. 
Title: Integrated Photonics for single photon microscopy

The second wave of quantum technologies is in its full wake and promises fundamental changes in research and industry. A new generation of sensors based on single photon sources will enable much higher sensitivities, while significantly reducing photo-induced damages. They are thus ideally suited for sensing applications in cell biology where miniature changes in the cell can be observed without disrupting its viability. Despite the recent advances in research their transfer into real-world applications is still in its infancies. In particular, portable and compact single photon sources that can be directly coupled into existing microscopy setups are still a matter of intensive research. 

Here, we focus on the development of a monolithic photonics solution that integrates the emission of single photons from a hexagonal Boron Nitride (hBN) flake directly into a single-mode optical fibre. We achieve large coupling efficiencies thanks to a high NA lens mounted on top of the fibre’s end by two-photon polymerization. Moreover, we show that single hBN flakes can be optically trapped inside the focus of the lens thereby self- aligning and providing an alternative and faster solution to create integrated photonics systems. In combination with microfluidics such a system can be directly used to probe molecular substances (either in liquid or gas form) revealing new insights with unprecedented sensitivity. 

The proposed integrated photonics system is expected to have a high potential impact in several research fields such as in microscopy, ultra-sensitive detection, and quantum communication. 

Time: 09.00 a.m.
Place: Seminar room 4, Xplanatorium, Herrenhäuser Gärten, Hannover, Germany
Herrenhäuser Gärten, Hannover