We studied the photoluminescence (PL)) from CdSe/CdMnS/CdS core/multi-shell colloidal nanoplatelets, a versatile platform to study the interplay of optical properties and nanomagnetism. The photoluminescence (PL) exhibits σ+ polarization in the applied magnetic field. Our measurement detects the presence of even a single magnetic monolayer shell. The PLL consists of a higher and a lower energy component; the latter exhibits a circular polarization peak. The time-resolved PL (trPL) shows a red shift as function of time delay. At early (later) times the trPL spectra coincide with the high (low) energy PL component. A model is proposed to interpret these results.
Athos Petrou, Thomas A. Scrace, Joseph R. Murphy, Peiyao Zhang, Tenzin Norden, Tianmu Zhang, Tim Thomay, Alexander N. Cartwright, Savas Delikanli, Mehmet Zafer Akgul, and Himli Volkan Demir, "Magneto-optical studies of CdSe/CdMnS/CdS core/multi-shell colloidal nanoplatelets," Proc. SPIE 9931, Spintronics IX, 99311W (Presented at SPIE Nanoscience + Engineering: August 30, 2016; Published: 4 November 2016); https://doi.org/10.1117/12.2239725.
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