Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Experimental investigation of long time irradiation in polydiene solutions: reversibility and instabilities
Δημιουργός/Συγγραφέας:	Anyfantakis, M. Fytas, G. Mantzaridis, C. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Butt, H-J Loppinet, B.
Εκδότης:	Iop Publishing Limited
Τόπος έκδοσης:	Bristol
Ημερομηνία:	2010-12
Γλώσσα:	Αγγλικά
ISSN:	2040-8978
DOI:	10.1088/2040-8978/12/12/124013
Περίληψη:	Polydiene solutions have recently been shown to possess a refractive index/concentration optical nonlinearity upon irradiation by CW-laser of a power as low as a few mW with typical timescales for solitonic formation in the order of seconds. Here we report on the effects of longer time laser irradiations which unveiled a variety of light-induced patterns. At extended irradiation times, rather than saturation or steady state of the single-filament pattern initially formed, the formation of more complex structures was systematically observed. The reversibility of the laser-induced concentration increase was shown to depend on irradiation time. Whereas exposures of the order of the inverse of the rate of formation resulted in reversible patterns, prolonged irradiation led to surprisingly long lasting irreversible structures that even resisted dissolution in a pure solvent. An intermediate case of semi-reversible patterns was observed giving rise to a pearl-necklace formation. Despite the as yet unidentified coupling, polydiene solutions offer a rich playground for soft matter nonlinear optics and potentially provide a readily available system for micro-patterning in a lithographic-like manner.
Τίτλος πηγής δημοσίευσης:	Journal of Optics (formerly Journal of Optics A: Pure and Applied Optics)
Τόμος/Κεφάλαιο:	12
Τεύχος:	12
Σελίδες:	[7]
Θεματική Κατηγορία:	[EL] Οπτική. Φώς[EN] Optics. Light
Λέξεις-Κλειδιά:	laser micropatterning polydiene solutions soft matter non linear optics optical spatial solitons modulation instabilities
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© IOP PUBLISHING LTD
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://www.iop.org/EJ/journal/Jopt
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο