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Tetrahedral colloidal clusters from random parking of bidisperse spheres
(American Physical Society, 2013)
Using experiments and simulations, we investigate the clusters that form when colloidal spheres stick irreversibly to—or “park” on—smaller spheres. We use either oppositely charged particles or particles labeled with ...
Point Defect Engineered Si Sub-Bandgap Light-Emitting Diode
(2007)
We extensively study the propagation features of higher-order modes in a photonic crystal fiber (PCF). Our analysis is based on a full-vector modal technique specially adapted to accurately describe light propagation in ...
Precision measurement of the Casimir-Lifshitz force in a fluid
(American Physical Society, 2007)
The Casimir force, which results from the confinement of the quantum-mechanical zero-point fluctuations of electromagnetic fields, has received significant attention in recent years for its effect on micro- and nanoscale ...
Metasurface Optics for On-Demand Polarization Transformations Along the Optical Path
(Springer Science and Business Media LLC, 2021-01-28)
Polarization plays a key role in science; hence its versatile manipulation is crucial. Existing polarization optics, however, can only manipulate polarization in a single transverse plane. Here, we demonstrate a new class ...
Wavelength Beam Combining of Quantum Cascade Laser Arrays for Remote Sensing
(International Society for Optical Engineering, 2010-02-12)
Holographic Detection of the Orbital Angular Momentum of Light With Plasmonic Photodiodes
(Nature Publishing Group, 2012)
Metallic components such as plasmonic gratings and plasmonic lenses are routinely used to convert free-space beams into propagating surface plasmon polaritons and vice versa. This generation of couplers handles relatively ...
Deformed Microcavity Quantum Cascade Lasers with Directional Emission
(Institute of Physics, 2009)
We report the experimental realization of deformed microcavity quantum cascade lasers (QCLs) with a Limaçon-shaped chaotic resonator. Directional light emission with a beam divergence of \(\theta_{\|} \approx 33^{\circ}\) ...
Scattering-Assisted Tunneling: Energy Dependence, Magnetic Field Dependence, and Use as an External Probe of Two-Dimensional Transport
(American Physical Society, 2010)
For more than three decades, research on tunneling through planar barriers has focused principally on processes that conserve momentum parallel to the barrier. Here we investigate transport in which scattering destroys ...
Layered superconductors as negative-refractive-index metamaterials
(American Physical Society, 2010)
We analyze the use of layered superconductors as strongly anisotropic metamaterials, which can possess negative-refractive-index in a wide frequency range. Superconductors are of particular interest because they have the ...
Epitaxial Catalyst-Free Growth of InN Nanorods on c-Plane Sapphire
(Springer-Verlag, 2009)
We report observation of catalyst-free hydride vapor phase epitaxy growth of InN nanorods. Characterization of the nanorods with transmission electron microscopy, and X-ray diffraction show that the nanorods are stoichiometric ...