The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We demonstrated an all-silica beam information detector based on Pancharatnam-Berry phase which can effectively detect the signal while the original wavefronts are strictly protected. A chiroptical spectrometer and a 12-channel angular momentum detector were proposed.
We present the alliance of the interleaved phased antenna array and spin-enabled optics of dielectric nanoantennas incorporated within a two-dimensional nanophotonic system, enabling the detection of the fundamental properties of light.
Multitasking shared-aperture systems have initially emerged as radar phased array antennas. Recently, the shared-aperture concept has been suggested as a platform for multifunctional optical phased array antennas, accomplished by a reflective metasurface [1]. Metasurfaces consist of metallic or dielectric subwavelength nanoantennas, capable of manipulating light by controlling the local amplitude...
We experimentally demonstrate the nonlinear mirror effect in a negative-index medium using a waveguide configuration. This confirms for the first time a decade old prediction and expands the scope of nonlinear optics in artificially-structured media.
From the reviews: "This book highlights several exciting new discoveries in this field and describes the underlying physics, nanofabrication issues, and the materials considerations involved in designing plasmonic devices with new functionality. The book is aimed at researchers and students interested in entering the field of plasmon nanophotonics, while serving as a reference to scientists...
We incorporate the shared-aperture phased antenna array concept and spin-controlled two-dimensional optics based on nanoantennas. By use of the geometric phase mechanism, utilizing the spin-orbit interaction phenomenon, a multifunctional metasurface is implemented. The shared-aperture metasurface platform opens a pathway to novel types of nanophotonic functionality.
Applying tensile strain with silicon nitride is demonstrated to improve the responsivity of germanium-tin (Ge1−xSnx) PIN photodetectors at longer wavelengths. Such external stressor films show promise for extending the application of Ge1−xSnx optoelectronic devices into the mid-infrared range.
In recent years, we have witnessed a flurry of activity in the fundamental research and development of surface plasmon based structures and devices. Surface plasmons are collective charge oscillations that occur at the interface between conductors and dielectrics. They can take various forms, ranging from freely propagating electron densitywaves along metal surfaces to localized electron...
Apolariton is an electromagnetic mode related to the oscillation of polarization charge density. At the interface between two media with frequency dependent complex dielectric functions ε1 and ε2, surface polaritons with electromagnetic field exponentially decaying into both media may occur according to the well-known dispersion relation
We demonstrated electrically-driven subwavelength surface plasmonic nano-circuits integrating gap-plasmon emitting nano-LEDs and deep-subwavelength slot waveguides with a cross-sectional area of ∼0.016λ2 for the first time. Owing to the Purcell enhancement within the extremely small, metal-clad active region of the nano-LED, gap-plasmons are extracted efficiently. The gap-plasmons propagating along...
We present a new platform for mimicking heterostructure behavior within nanowires of a single material by using non-uniform strain. These pseudo-heterostructures have lithographically customizable band profiles and show effective carrier confinement at room temperature.
We report uniaxial tensile strains up to 5.0% in lithographically patterned germanium nanowires, which is enough strain to make germanium a direct bandgap semiconductor. Theoretically, this strain can reduce a germanium laser's threshold by >16,000x.
Plasmonics is an exploding new field of science and technology in which the flow of light can be molded at the nanoscale using metallic nanostructures. This newly found ability is rapidly impacting every facet of optics and photonics and is enabling a myriad of exciting new technologies. Semiconductor nanophotonics has also seen tremendous recent progress in the development of high performance light...
Nearly perfect 90-degree bends and T-splitters are demonstrated in plasmonic nano-coaxial waveguides at the telecommunication wavelength, with bending and splitting efficiencies greater than 97% and 99%, respectively.
We demonstrate propagation, routing round bends and integrated detection of light on a deeply sub-wavelength scale in two-conductor metallic slot waveguides. Light with cross-section ∼ λ2/100 propagates ∼10λ at 850nm in good agreement with simulations.
Plasmonics is an exploding new field of science and technology in which the flow of light can be molded at the nanoscale using metallic nanostructures. This newly found ability is rapidly impacting every facet of optics and photonics and is enabling a myriad of exciting new technologies. Group IV photonics has also seen tremendous recent progress in the development of high performance light sources,...
A novel method to introduce more than 0.6% biaxial tensile strain and achieve a 60meV direct band gap reduction in epitaxially grown germanium is demonstrated. Possible applications include high efficiency germanium lasers on silicon substrates.
We present a plasmonic device that can determine the state of polarization of an incident light beam over a narrow wavelength band. The measurement results show 25 and 1.13 contrast ratio for linear and circular polarizations at 830nm.
A combined computational and experimental study optimizing plasmon-enhanced absorption in Si thin film solar cells presented. A model system consisting of a 2-dimensional periodic /aperiodic arrays of Ag nanostructures on a silica coated Si film supported by a silica substrate is used in the simulations. We develop basic design rules for the realization of broadband absorption enhancements for such...
A combined computational and experimental study optimizing plasmon-enhanced absorption in Si thin film solar cells presented. A model system consisting of a 2-dimensional periodic /aperiodic arrays of Ag nanostructures on a silica coated Si film supported by a silica substrate is used in the simulations. We develop basic design rules for the realization of broadband absorption enhancements for such...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.