John Andris Roberts
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View article: Electrically Driven Hyperbolic Nanophotonic Resonators as High Speed, Spectrally Selective Thermal Radiators
Electrically Driven Hyperbolic Nanophotonic Resonators as High Speed, Spectrally Selective Thermal Radiators Open
We introduce and experimentally demonstrate a new class of electrically driven thermal emitter based on globally aligned carbon nanotube metamaterials patterned as nanoscale ribbons. The metamaterial ribbons exhibit electronic and photonic…
View article: Ultrahigh-Quality Infrared Polaritonic Resonators Based on Bottom-Up-Synthesized van der Waals Nanoribbons
Ultrahigh-Quality Infrared Polaritonic Resonators Based on Bottom-Up-Synthesized van der Waals Nanoribbons Open
van der Waals nanomaterials supporting phonon polariton quasiparticles possess extraordinary light confinement capabilities, making them ideal systems for molecular sensing, thermal emission, and subwavelength imaging applications, but the…
View article: Ultrahigh quality infrared polaritonic resonators based on bottom-up-synthesized van der Waals nanoribbons
Ultrahigh quality infrared polaritonic resonators based on bottom-up-synthesized van der Waals nanoribbons Open
van der Waals nanomaterials supporting phonon polariton quasiparticles possess unprecedented light confinement capabilities, making them ideal systems for molecular sensing, thermal emission, and subwavelength imaging applications, but the…
View article: Multiple Tunable Hyperbolic Resonances in Broadband Infrared Carbon-Nanotube Metamaterials
Multiple Tunable Hyperbolic Resonances in Broadband Infrared Carbon-Nanotube Metamaterials Open
Aligned densely packed carbon-nanotube metamaterials prepared using vacuum filtration are an emerging infrared nanophotonic material. We report multiple hyperbolic plasmon resonances, together spanning the mid-infrared, in individual reson…
View article: Toward Polarization-Switched Molecular Pumps
Toward Polarization-Switched Molecular Pumps Open
Pumping of fluids is universally performed by using mechanical or thermal compressors. We demonstrate for the first time a new solid-state molecular pumping mechanism induced by switching the adsorption affinity for a gas through polarizat…
View article: Tunable Hyperbolic Metamaterials Based on Self-Assembled\nCarbon Nanotubes
Tunable Hyperbolic Metamaterials Based on Self-Assembled\nCarbon Nanotubes Open
We show that packed, horizontally\naligned films of single-walled\ncarbon nanotubes are hyperbolic metamaterials with ultrasubwavelength\nunit cells and dynamic tunability. Using Mueller matrix ellipsometry,\nwe characterize the films’ opt…
View article: Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes
Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes Open
We show that packed, horizontally aligned films of single-walled carbon nanotubes are hyperbolic metamaterials with ultra-subwavelength unit cells and dynamic tunability. Using Mueller-matrix ellipsometry, we characterize the films' doping…