Abstract:
:Empowering an indirect band-gap material like Si with optical functionalities, firstly light emission, represents a huge advancement constantly pursued in the realization of any integrated photonic device. We report the demonstration of giant photoluminescence (PL) emission by a newly synthesized material consisting of crystalline faceted Si grains (fg-Si), a hundred nanometer in size, assembled in a porous and columnar configuration, without any post processing. A laser beam with wavelength 632.8 nm locally produce such a high temperature, determined on layers of a given thickness by Raman spectra, to induce giant PL radiation emission. The optical gain reaches the highest value ever, 0.14 cm/W, representing an increase of 3 orders of magnitude with respect to comparable data recently obtained in nanocrystals. Giant emission has been obtained from fg-Si deposited either on glass or on flexible, low cost, polymeric substrate opening the possibility to fabricate new devices.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Faraci G,Pennisi AR,Alberti A,Ruggeri R,Mannino Gdoi
10.1038/srep02674subject
Has Abstractpub_date
2013-01-01 00:00:00pages
2674issn
2045-2322pii
srep02674journal_volume
3pub_type
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