Dynamically controlled plasmonic nano-antenna phased array utilizing vanadium dioxide

Gregory Kaplan, Koray Aydin*, Jacob Scheuer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


We propose and analyze theoretically an approach for realizing a tunable optical phased-array antenna utilizing the properties of VO2 for electronic beam steering applications in the near-IR spectral range. The device is based on a 1D array of slot nano-antennas engraved in a thin Au film grown over VO2 layer. The tuning is obtained by inducing a temperature gradient over the device, which changes the refractive index of the VO2, and hence modifies the phase response of the elements comprising the array, by producing a thermal gradient within the underlying PCM layer. Using a 10-element array, we show that an incident beam can be steered up to ± 22° with respect to the normal, by applying a gradient of less than 10°C.

Original languageEnglish
Pages (from-to)2513-2524
Number of pages12
JournalOptical Materials Express
Issue number11
StatePublished - 2015


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