Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 20: Poster I
HL 20.67: Poster
Tuesday, March 10, 2026, 18:00–20:00, P1
Cavity-enhanced microscopy: absorption measurements of single perovskite nanocubes and photo-switchable lipids — •Ayesha Khan1, Ines Amersdorffer1,2, David Hunger3, and Thomas Hümmer1,2 — 1Qlibri GmbH, Munich, Germany — 2Ludwig Maximilian University of Munich, Munich, Germany — 3Karlsruhe Institute of Technology, Karlsruhe, Germany
Optical studies of nano-scale systems through spectroscopy and imaging can reveal intrinsic optical properties of materials including resolving the exitonic fine structure of systems. However, due to diminutive absorption of nano-scale systems, it is challenging to perform absorption spectroscopy.
For a nano-scale system placed inside an optical resonator, the light passes through the sample thousands of times, enhancing the absorption and thus, allowing measurements.
Here we demonstrate the use of a fiber-based, open-access microcavity to perform direct measurements of the absorption of single perovskite nanocubes. We further image and obtain hyperspectral maps of perovskite nanocubes.
We also present the use of the cavity microscope to image label-free Azo-PC phospholipid bilayers in both cis and trans state and show the diffusion of the two states.
The successful measurements of different nano-scale systems promise that fiber-based microcavities can become standard tools for absorption measurements of these systems.
Keywords: micro-cavity; absorption; imaging; perovskite nanocubes; photolipids