Photo-induced-heat localization on nanostructured metallic glasses

Ceren Uzun, Niloofar Kahler, Luis Grave De Peralta, Golden Kumar, Ayrton A. Bernussi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Materials with large photo-thermal energy conversion efficiency are essential for renewable energy applications. Photo-excitation is an effective approach to generate controlled and localized heat at relatively low excitation optical powers. However, lateral heat diffusion to the surrounding illuminated areas accompanied by low photo-thermal energy conversion efficiency remains a challenge for metallic surfaces. Surface nanoengineering has proven to be a successful approach to further absorption and heat generation. Here, we show that pronounced spatial heat localization and high temperatures can be achieved with arrays of amorphous metallic glass nanorods under infrared optical illumination. Thermography measurements revealed marked temperature contrast between illuminated and non-illuminated areas even under low optical power excitation conditions. This attribute allowed for generating legible photo-induced thermal patterns on textured metallic glass surfaces.

Original languageEnglish
Article number094306
JournalJournal of Applied Physics
Volume122
Issue number9
DOIs
StatePublished - Sep 7 2017

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