All-optical multilevel switching of GST metasurface
Frontiers in Optics(2020)
Abstract
Ge2Sb2Te5 (GST) has bi-stable phases, so called amorphous and crystalline phase. It can be reversibly switched within nanosecond time scale through applying thermal bias. We introduce a method to expand GST metasurface’s switching functionality to three levels.
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Key words
gst metasurface,switching,all-optical
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