 | Permanently reconfigured metamaterials due to terahertz induced mass transfer of gold |
Optics Express, Vol. 23, Issue 9, pp. 11586-11599 (2015)
http://dx.doi.org/10.1364/OE.23.011586
http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-23-9-11586http://dx.doi.org/10.1364/OE.23.011586
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We present a new technique for permanent metamaterial reconfiguration via optically induced mass transfer of gold. This mass transfer, which can be explained by field-emission induced electromigration, causes a geometric change in the metamaterial sample. Since a metamaterial’s electromagnetic response is dictated by its geometry, this structural change massively alters the metamaterial’s behavior. We show this by optically forming a conducting pathway between two closely spaced dipole antennas, thereby changing the resonance frequency by a factor of two. After discussing the physics of the process, we conclude by presenting an optical fuse that can be used as a sacrificial element to protect sensitive components, demonstrating the applicability of optically induced mass transfer for device design.
© 2015 Optical Society of America
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