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arXiv · 1212.4170

Two-Path Solid-State Interferometry Using Ultra-Subwavelength 2D Plasmonic Waves

Kitty Y. M. Yeung·Hosang Yoon·William Andress·Ken West·Loren Pfeiffer·Donhee Ham
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Abstract

We report an on-chip solid-state Mach-Zehnder interferometer operating on two-dimensional (2D) plasmonic waves at microwave frequencies. Two plasmonic paths are defined with GaAs/AlGaAs 2D electron gas 80 nm below a metallic gate. The gated 2D plasmonic waves achieve a velocity of ~c/300 (c: free-space light speed). Due to this ultra-subwavelength confinement, the resolution of the 2D plasmonic interferometer is two orders of magnitude higher than that of its electromagnetic counterpart at a given frequency. This GHz proof-of-concept at cryogenic temperatures can be scaled to the THz IR range for room temperature operation, while maintaining the benefits of the ultra-subwavelength confinement.

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Kitty Y. M. Yeung, Hosang Yoon, William Andress, Ken West, Loren Pfeiffer, Donhee Ham. 2012-12-17. Two-Path Solid-State Interferometry Using Ultra-Subwavelength 2D Plasmonic Waves. https://doi.org/10.1063/1.4775668

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