Light-Induced Inhibition of Photoluminescence Emission of Core/Shell Semiconductor Nanorods and Its Application for Optical Data Storage
| Autor: | Marco Zanella, Marco Scotto d'Abbusco, Marco Allione, Sergio Marras, William Dallari, Liberato Manna, Alberto Diaspro |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
3D optical data storage
Materials science Photoluminescence business.industry Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention General Energy Semiconductor Nanocrystal law Transmission electron microscopy Femtosecond Optoelectronics Nanorod Physical and Theoretical Chemistry 0210 nano-technology business |
| Zdroj: | The Journal of Physical Chemistry C |
| Popis: | In this work, we demonstrate that the photoluminescence emission of CdSe/CdS spherical core/rod like shell nanorods can be completely inhibited by using low-energy femtosecond laser pulses at 720 nm. A combined analysis of optical confocal microscopy images and transmission electron microscope micrographs reveals the presence of different power regimes in the nanocrystals photodegradation process. The photoluminescence inhibition of the nanorods is found to start at a power range in which no apparent structural damage occurs to the nanorods after irradiation. This suggests the presence of a photochemical transformation of the nanocrystals that is of potential interest for application in optical data storage. This is because in recording systems based on photochemical processes the photoexcited volume can be effectively confined within the diffraction-limited laser focus. We indeed demonstrate that the recorded mark can be scaled down to a few nanorods, or even to a single nanorod, without crosstalk betwee... |
| Databáze: | OpenAIRE |
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