Publication date: 15th December 2025
The search for high-performance circularly polarized luminescence (CPL) is an ongoing effort due to prospective applications spanning quantum communication, cryptography, and medical imaging. To realize these promises, potential emitters must be integrated into existing telecom and sensing architectures, with their emission tuned to the ubiquitous C-band around 1550 nm. Unfortunately, despite the growing library of CPL emitters, extracting C-band CPL remains elusive, and the few known candidates are lanthanide complexes limited by low quantum yields. Hybrid organic-inorganic nanocrystals are emerging as important candidates due to their outstanding optical properties and highly tunable structures. In this talk, I will discuss how chiral surface ligands affect the circular dichroism and CPL emission in halide perovskite nanoplatelets, and introduce our strategies to realize efficient CPL in the communication band through cation doping. By employing transmission electron microscopy and atomic scale electron energy loss mapping, we interrogate the mechanisms behind the CPL and reveal a structure-CPL relationship induced by chiral surface ligands.
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