Small footprint nano-mechanical plasmonic phase modulators

The authors' recent Nature Photonics article titled "Compact Nano-Mechanical Plasmonic Phase Modulators" [1] is reviewed which reports a new phase modulation principle with experimental demonstration of a 23 μm long non-resonant modulator having 1.5 π rad range with 1.7 dB excess loss at 780 nm. Analysis showed that by decreasing all dimensions, a low loss, ultra-compact π rad phase modulator is possible. Application of this type of nano-mechanical modulator in a miniature 2 x 2 switch is suggested and an optical design numerically validated. The footprint of the switch is 0.5 μm x 2.5 μm.

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