Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster – Photonics
Q 40.17: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 1. OG
Mid- to long-wave-infrared nanoscopy with lanthanide transducers — •Junyu Guan1, Hanyu Zhang1, Yanan Li2, Kun Huang2, and Kangwei Xia1 — 1Laboratory of Spin Magnetic Resonance, School of Physical Sciences, University of Science and Technology of China — 2State Key Laboratory of Precision Spectroscopy, East China Normal University
Mid- to long-wave infrared (MIR-LWIR) microscopy provides a non-invasive and label-free tool to acquire rich spectroscopic and structural information about chemical materials and biomedical samples. However, the lateral resolution is typically limited by severe optical diffraction at long infrared wavelengths, which hinders imaging systems from observing intricate details beyond the diffraction limit. Here, we report a MIR-LWIR to near infrared (NIR) transducer based on a rare-earth-doped crystal, which enables room-temperature MIR-LWIR imaging within a broad spectral coverage of 7-10.6 µm. The presented lanthanide-based transducer is compatible with close positioning to nano-/micro-structures, facilitating near-field MIR-LWIR imaging with an improved spatial resolution from 50 µm to sub-µm. Notably, hidden objects can be accurately identified with high axial precision owing to the confocal excitation configuration, which enables high-resolution MIR-LWIR depth imaging. In addition, experimental validation using two-dimensional materials such as hexagonal boron nitride reveals distinct MIR-LWIR response characteristics, demonstrating the system’s capability for high-resolution imaging and spectroscopic characterization across extended infrared wavelengths.
Keywords: Mid-infrared; Super-resolution; Lanthanide Transducer