Theory of plasmon reflection by a 1D junction

Abstract

We present a comprehensive study of the reflection of normally incident plasmon waves from a low-conductivity 1D junction in a 2D conductive sheet. Rigorous analytical results are derived in the limits of wide and narrow junctions. Two types of phenomena determine the reflectance, the cavity resonances within the junction and the capacitive coupling between the leads. The resonances give rise to alternating strong and weak reflection but are vulnerable to plasmonic damping. The capacitive coupling, which is immune to damping, induces a near perfect plasmon reflection in junctions narrower than $1/10$ of the plasmon wavelength. Our results are important for infrared 2D plasmonic circuits utilizing slot antennas, split gates or nanowire gates. They are also relevant for the implementation of nanoscale terahertz detectors, where optimal light absorption coincides with the maximal junction reflectance.

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Cited by in corpus (8)

• Graphene as a source of entangled plasmons
• Refraction laws for two-dimensional plasmons
• Plasmons in two-dimensional electron systems with infinite and semi-infinite metal gratings
• Simulation of Scanning Near-Field Optical Microscopy Spectra of 1D Plasmonic Graphene Junctions
• Novel SuperLattice Plasmon Mode in a Grating of 2D Electron Strips
• Unconventional quantization of 2D plasmons in cavities formed by gate slots
• Plasmonic band and defect mode of one dimensional graphene lattice
• Quasi-stationary near-gate plasmons in van der Waals heterostructures