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Circularly Polarized Absorption and Luminescence of Semiconductor Eu‐OCN Nanocrystals in the Blue Region of the Electromagnetic Spectrum
Author(s) -
Hasegawa Yasuchika,
Koide Katsumasa,
Tsurui Makoto,
Kitagawa Yuichi,
Nakanishi Takayuki,
Doi Yoshihiro,
Hinatsu Yukio,
Fushimi Koji
Publication year - 2020
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202000468
Subject(s) - luminescence , nanocrystal , absorption (acoustics) , semiconductor , blueshift , absorption spectroscopy , photochemistry , materials science , optoelectronics , chemistry , nanotechnology , photoluminescence , optics , physics
Semiconductor nanomaterials with efficient polarized‐light control in the blue region of the visible spectrum are promising candidates for modern and future photo‐information technology, display devices, and optical sensing applications. New‐type semiconductor Eu(OCN) 2 nanocrystals with circularly polarized absorption (CD: circular dichroism) and emission (CPL: circularly polarized luminescence) under an applied magnetic field are demonstrated here for the first time. The effective CD signal at 1.6 T was observed at approximately 440 nm. The dissymmetry factor of CPL under 100 K, g M‐CPL, was estimated to be 0.01. These characteristic circularly polarized absorption and emission phenomena of Eu(OCN) 2 nanocrystals should be caused by combination between the “Faraday A and C terms” of the magnetic moment in the excited state. Polarized‐light control using Eu(OCN) 2 nanocrystals in the blue‐light region of the electromagnetic spectrum is a large first step into a new world of photo‐functional semiconductor nanomaterials.