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Direct observation of significant hot carrier cooling suppression in a two-dimensional silicon phononic crystal

Yan, Wensheng 1; Long, Liyuan; Zang, Yue; Yang, Gaoyuan; Liang, Guijie
1 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Abstract:

Finding hot carrier cooling suppression in new material structures is fundamentally important for developing promising technological applications. These phenomenona have not been reported for crystalline silicon phononic crystals. Herein, we experimentally design two-dimensional (2D) silicon samples consisting of airy hole arrays in a crystalline silicon matrix. For reference, the determined hot carrier cooling times were 0.45 ps and 0.37 ps, respectively, at probe wavelengths of 1080 nm and 1100 nm. Surprisingly, when the 2D structured silicon possessed the properties of a phononic crystal, significant suppression of hot carrier cooling was observed. In these cases, the observed hot carrier cooling times were as long as 15.9 ps and 10.7 ps at probe wavelengths of 1080 nm and 1100 nm, respectively, indicating prolongation by orders of magnitude. This remarkable enhancement was also observed with other probe wavelengths. The present work presents experimental evidence for hot carrier cooling suppression in 2D silicon phononic crystals and opens opportunities for promising applications.


Verlagsausgabe §
DOI: 10.5445/IR/1000148683
Veröffentlicht am 14.07.2022
Originalveröffentlichung
DOI: 10.1038/s41427-022-00397-1
Scopus
Zitationen: 6
Web of Science
Zitationen: 6
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2022
Sprache Englisch
Identifikator ISSN: 1884-4049, 1884-4057
KITopen-ID: 1000148683
HGF-Programm 38.01.05 (POF IV, LK 01) Simulations, Theory, Optics and Analytics (STOA)
Erschienen in NPG Asia Materials
Verlag Springer Nature [academic journals on nature.com]
Band 14
Seiten Art.-Nr.: 51
Vorab online veröffentlicht am 17.06.2022
Nachgewiesen in Dimensions
Scopus
Web of Science
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