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A planar hyperlens based on a modulated graphene monolayer
Ebrahim Forati, George W. Hanson, Alexander B. Yakovlev +1
The canalization of terahertz surface plasmon polaritons using a modulated graphene monolayer is investigated for subwavelength imaging. An anisotropic surface conductivity formed…
Physical Bounds on Absorption and Scattering for Cloaked Sensors
Romain Fleury, Jason Soric, Andrea Alu
We derive and discuss general physical bounds on the electromagnetic scattering and absorption of passive structures. Our theory, based on passivity and power conservation, quantif…
Enhanced Faraday Rotation via Resonant Tunnelling in Tri-Layers Containing Magneto-Optical Metals
Massimo Moccia, Giuseppe Castaldi, Vincenzo Galdi +2
We study resonant tunnelling effects that can occur in tri-layer structures featuring a dielectric layer sandwiched between two magneto-optical-metal layers. We show that the reson…
Optical isolation via unidirectional resonant photon tunneling
Massimo Moccia, Giuseppe Castaldi, Vincenzo Galdi +2
We show that tri-layer structures combining epsilon-negative and magneto-optical material layers can exhibit unidirectional resonant photon tunneling phenomena that can discriminat…
Do Cloaked Objects Really Scatter Less?
Francesco Monticone, Andrea Alu
We discuss the global scattering response of invisibility cloaks over the entire frequency spectrum, from static to very high frequencies. Based on linearity, causality and energy…
Broadening the Bandwidth of Metamaterial Cloaks with Non-Foster Metasurfaces
Pai-Yen Chen, Christos Argyropoulos, Andrea Alu
We introduce the concept and practical design of broadband, ultrathin cloaks based on non-Foster, negatively capacitive metasurfaces. By using properly tailored, active frequency-s…
Generalized Retrieval Method for Metamaterial Constitutive Parameters Based on a Physically-Driven Homogenization Approach
Xing-Xiang Liu, Andrea Alu
Based on the recently introduced homogenization theory developed in [Phys. Rev. B 84, 075153 (2011)], we propose a generalized retrieval method that allows extracting physically me…
Enhanced Super-Radiance in Epsilon-Near-Zero Plasmonic Channels
Romain Fleury, Andrea Alu
We describe the possibility of drastically boosting the spontaneous emission of a collection of two-level quantum emitters by embedding them in an epsilon-near-zero (ENZ) environme…
Furtive Quantum Sensing Using Matter-Wave Cloaks
Romain Fleury, Andrea Alu
We introduce the concept of furtive quantum sensing, demonstrating the possibility of concealing quantum objects from matter-waves, while maintaining their ability to interact and…
Manipulating the Nanoscale Optical Transmission with a Meta-Transmitarray
Francesco Monticone, Nasim Mohammadi Estakhri, Andrea Alu
By applying the optical nanocircuit concepts to metasurfaces, we propose an effective route to locally control light transmission over a deeply subwavelength scale. This concept re…