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Elastic light scattering from a germanium microsphere with a radius of 2000 µm is analyzed numerically in the terahertz region from 297 µm to 303 µm. Germanium has a high refractive index (n = 4) in the terahertz range [1], which makes it possible to trap light effectively and achieve high quality factor whispering gallery modes (WGMs) [2]. Microsphere WGMs have high quality factors [3,4] and germanium...
The effect of increasing temperature on the optical, spectroscopic and structural properties of phospho-silicate nano-composites thin films SPNCTF and monolith SPNCM were studied. Doping the mentioned prepared forms of sample with some rare earth oxide such as Neodymium (Nd3+), Erbium (Er3+), Holmium (Ho3+) etc… SPNCRETF and SPNCREM have been prepared. Such materials could be promising for wave guide...
One optimal window for biological imaging lies around 1675 ± 20 nm wavelength, a result of the decreased effects of both tissue scattering and water absorption. Furthermore, in nonlinear microscopy the signal-to-background ratio, which limits the maximum penetration depth, is dramatically increased with increasing photon order. As a consequence, three-photon microscopy with an excitation wavelength...
Optical resonators made of dielectric and semiconductor microsphere cavities are of interest due to their whispering gallery modes (WGMs) [1,2]. Initially the WGMs of the microspheres have been excited with plane waves [3]. Later on, single mode optical fiber excitation has been used to couple to the WGM's of the microspheres [4]. Optical waveguides can also be used for the excitation of microresonator...
Silicon photonics is a promising platform for implementing quantum information processes. Since the development of the first integrated waveguide photon pair sources in 2006, a lot of progress has been made towards demonstrating the operation of the different functionalities required to implement universal quantum computation on this platform. I will review the state of the art and will then highlight...
We report our recent advances in development of subwavelength engineered dielectric metamaterial structures for integrated photonics. By locally engineering the refractive index of silicon by forming a pattern of holes at the subwavelength scale it is possible to manipulate the flow of light in silicon nanophotonic waveguides [1], [2], [3], [4], [5], [6]. Specifically, we present a broadband fibre-chip...
In many quantum information applications quantum bits (qubits) are stored in single trapped atoms or ions. In particular, single ions held in radiofrequency electromagnetic traps are preferred because of their long achievable decoherence time and record-breaking quantum gate fidelity [1]. However, for scalable quantum information processing many such stationary qubits need to be connected. A preferred...
Atomic spontaneous emission can be enhanced in a lossy cavity due to the bi-orthogonality of resonance modes. This phenomenon is known as the Petermann effect. If the cavity is non-regular, coupling arises between cavity modes. As a result, two interacting modes coalesce to a single mode at an exceptional point in the parameter space. Here, we first present our recent quantum calculation based on...
In this work, the switching characteristics as associated with p+n gated MOSFET silicon LED are reviewed. By employing the insulated-gate terminal, which allows the adjustment of P+ source/drain to N− substrate junction breakdown voltage, it is demonstrated that the electro-optical modulation in the Si-PMOSFET device operates as gate-controlled diodes. The PMOSFET device can operate as a Si-diode...
Large network operator environments are composed of thousands of nodes and devices capable of performing multiple roles. This network infrastructure is multi-layered, multi-vendor and underpinned by a high capacity and complex optical transport network. Managing this network requires millions of lines of configuration files and hundreds of Operational Support Systems. Typically, the management data...
We investigate the optical coupling of excitons confined in site-controlled semiconductor quantum dots (QDs) with the modes of photonic crystal (PhC) cavities membrane cavities and waveguides. The structures are fabricated by organometallic vapor phase epitaxy of InGaAs/GaAs heterostructures on patterned (111)B GaAs substrates combined with electron-beam-based nanolithography. We elucidate the role...
InP and Silicon Photonics integrated optical devices able to mux and demux signals encoded on different orthogonal modes. They operate on 2 and 4 channels at 10 Gbit/s with less than −15 dB residual crosstalk. Transparent photodetectors, realized though the non-invasive ContacLess Integrated Photonic Probe (CLIPP) technology are exploited to assist the (de)mux configuration.
We will present details of optical properties of silver nanoparticles in titanium dioxide host (Ag-TiO2) plasmonic absorbers. These nanocomposites were fabricated using electron beam physical vapour deposition technique. Components were deposited sequentially. We varied several parameters of the structures and fabrication process including silver and TiO2 layer thickness, number of layers, deposition...
The National Institute of Telecommunications, Department of Transmission and Optical Technologies in Warsaw, together with the Institute for Photonics and Nanotechnologies of the National Research Council (IFN-CNR), Bruno Kessler Foundation (FBK), University of Trento and the IEEE Photonics Society Poland Chapter are pleased to announce the 18th International Conference on Transparent Optical Networks...
Owing to their unique combination of low nonlinearity, low latency, air guidance, and bend-insensitivity, hollow core photonic bandgap fibres (HC-PBGFs) have been proposed for a range of applications. However, the availability of high performance, i.e. large core, long length, broad bandwidth, and low loss HC-PBGFs, which would strongly benefit some of these applications (e.g. telecom/datacom) is...
To support the immense traffic growth and enable scalable on-demand provisioning of service requests, optical networks must deliver great agility and reconfigurability in a cost- and resource-efficient manner. The progress in elastic coherent transmission [1] has enabled simplifications in the optical network architecture by, for example, replacing the costly wavelength switches in the add/drop part...
Optical interconnects is today an obvious solution for inter- and intra-data center communication, but is also continuously penetrating the shorter and shorter distances in structures down to chip-to-chip and on-chip data transfer for multi-core processors.
Rare earth doped materials have a wide set of applications such as optical telecommunications and amplifiers, solar cells and temperature sensors, laser gain waveguide media and optical fibres. Materials doped, for example with Er3+, are often strongly emitting and therefore may be measured with relatively simple equipment. This review will describe the luminescence spectroscopic methods used and...
Future optical networks will integrate multi-layer functions, in a fast adapting infrastructure. When the data and control dynamics speed-up by 3 to 4 orders of magnitude as projected, the entire network architecture, from the Physical to the Application Layers, must be redesigned to be scalable. This talk will describe the daunting challenges for this new architecture and propose some avenues for...
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