A5063956956- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Metamaterials and Metasurfaces Applications
- Near-Field Optical Microscopy
- Gold and Silver Nanoparticles Synthesis and Applications
- Tissue Engineering and Regenerative Medicine
- Electrospun Nanofibers in Biomedical Applications
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and interfaces
- Nanofabrication and Lithography Techniques
- Quantum Dots Synthesis And Properties
- Advanced biosensing and bioanalysis techniques
- Ion-surface interactions and analysis
- Semiconductor materials and devices
- Advanced X-ray Imaging Techniques
- Microfluidic and Bio-sensing Technologies
- Advanced Semiconductor Detectors and Materials
- Thin-Film Transistor Technologies
- Semiconductor Lasers and Optical Devices
- Optical Wireless Communication Technologies
- Optical Polarization and Ellipsometry
Quantum Technologies (Sweden)
2023-2025
University of Padua
2016-2025
Istituto Officina dei Materiali
2012-2025
Consorzio per la Ricerca Sanitaria
2019-2024
AREA Science Park
2013-2024
Città della Speranza Foundation
2018-2023
Veneto Nanotech (Italy)
2009-2019
Fondazione Bruno Kessler
2018
Istituto Nazionale di Fisica Nucleare, Centro Nazionale Analisi Fotogrammi
2016
Vitenparken
2016
We have shown experimentally, in a real-world setting, that it is possible to use two beams of incoherent radio waves, transmitted on the same frequency but encoded different orbital angular momentum states, simultaneously transmit independent channels. This novel technique allows implementation of, principle, an infinite number channels given, fixed bandwidth, even without using polarization, multiport or dense coding techniques. paves way for innovative techniques science and entirely new...
The experimental evidence that radio techniques can be used for synthesizing and analyzing non-integer electromagnetic (EM) orbital angular momentum (OAM) of radiation is presented. technique amounts to sample, in space time, the EM field vectors digitally processing data calculate vortex structure, spatial phase distribution, OAM spectrum radiation. verification OAM-carrying beams readily generated exploited by using paves way an entirely new paradigm radar communication protocols.
Single layer boron-doped graphene layers have been grown on polycrystalline copper foils by chemical vapor deposition using methane and diborane as carbon boron sources, respectively. Any attempt to deposit doped in one-step has fruitless, the reason being formation of very reactive species a consequence decomposition Cu surface, which leads disordered nonstoichiometric carbides. However, two-step procedure optimized: first step, surface is seeded with pure islands, while source activated...
Our recent paper (Tamburini et al 2012 New J. Phys. 14 033001), which presented results from outdoor experiments that demonstrate it is physically feasible to simultaneously transmit different states of the newly recognized electromagnetic (EM) quantity orbital angular momentum (OAM) at radio frequencies into far zone and identify these there, has led a comment (Tamagnone 118001). These authors discuss whether our investigations can be regarded as particular implementation...
The experimental proof that near-field radio communication channels based on orbital angular momentum (OAM) are naturally isolated is presented. In zone, we show two antennas, built for producing a beam with the same value of OAM, have good throughput. On other hand, antennas different types, i.e., generating beams OAM values, including standard l = 0 antenna, exhibit modal isolation .
Spiral phase plates for the generation of Laguerre-Gaussian (LG) beam with non-null radial index were designed and fabricated by electron lithography on polymethylmethacrylate over glass substrates. The optical response these elements was theoretically considered experimentally measured, purity experimental beams investigated in terms LG modes contributions. far-field intensity pattern compared theoretical models numerical simulations, whereas interferometric analyses confirmed expected...
Radio beams that carry nonzero orbital angular momentum (OAM) are analyzed from the viewpoint of a multiple-input-multiple-output (MIMO) communication system. Often, natural OAM-beam orthogonality cannot be fully exploited because spatial constraints on receiving antenna size. Therefore, we investigate how far OAM-induced phase variations can in demultiplexing based conventional (linear momentum) receivers. Performances investigated versus position and size transmitting devices. The use...
Bladder cancer (BC) is among the most common malignancies in world and a relevant cause of mortality. BC one frequent causes for bladder removal through radical cystectomy, gold-standard treatment localized muscle-invasive some cases high-risk, non-muscle-invasive cancer. In order to restore urinary functionality, an autologous intestinal segment has be used create diversion. However, several complications are associated with bowel-tract removal, affecting patients’ quality life. The present...
The discovery that light beams with a helical phase front carry orbital angular momentum (OAM) has enabled applications in many fields ranging from optical manipulation to quantum information processing and, recently, free-space transfer and communications. Here, novel three-dimensional fabrication process by electron beam lithography was finely tuned order realize high-quality spiral plates (SPPs) for the generation of OAM-carrying beams. Single- multi-step SPPs have been realized...
Abstract We present a method to efficiently multiply or divide the orbital angular momentum (OAM) of light beams using sequence two optical elements. The key element is represented by an transformation mapping azimuthal phase gradient input OAM beam onto circular sector. By combining multiple circular-sector transformations into single element, it possible value state splitting and complementary sectors. Conversely, inverse transformations, division initial achievable distinct sectors equal...
During the last decade, orbital angular momentum (OAM) of light has attracted growing interest as a new degree freedom for signal channel multiplexing in order to increase information transmission capacity today's optical networks. Here we present design, fabrication and characterization phase-only diffractive elements (DOE) performing mode-division (de)multiplexing (MDM) spatial-division (SDM) at same time. Samples have been fabricated with high-resolution electron-beam lithography...
Abstract The design and fabrication of a compact diffractive optical element is presented for the sorting beams carrying orbital angular momentum (OAM) light. sorter combines conformal mapping transformation with an fan-out, performing demultiplexing unprecedented levels miniaturization OAM resolution. Moreover, innovative configuration proposed which simplifies alignment procedures further improves compactness device. Samples have been fabricated in form phase-only optics high-resolution...
Surface Plasmon Resonance (SPR)-based sensors have the advantage of being label-free, enzyme-free and real-time. However, their spreading in multidisciplinary research is still mostly limited to prism-coupled devices. Plasmonic gratings, combined with a simple cost-effective instrumentation, been poorly developed compared system mainly due lower sensitivity. Here we describe optimization signal enhancement sensing platform based on phase-interrogation method, which entails exploitation...
Xenogeneic pericardium-based substitutes are employed for several surgical indications after chemical shielding, limiting their biocompatibility and therapeutic durability. Adverse responses to these replacements might be prevented by tissue decellularization, ideally removing cells preserving the original extracellular matrix (ECM). The aim of this study was compare mostly applied pericardia in clinics, i.e., bovine porcine tissues, obtain new insights possible use. Bovine were submitted...
The fabrication, characterization and functionalization of periodically patterned nanoporous gold layers is presented.The material shows plasmonic properties in the near infrared range, with excitation propagation surface plasmon polaritons.Functionalization a marked enhancement optical response comparison evaporated gratings, due to great increase active surface.Due its superior response, patterns appear promising for realization compact platforms sensing purposes.
A novel, surface plasmon resonance phase-interrogation based microfluidic biosensor in which acoustic wave-driven mixing accelerates molecule binding kinetics up to 84% of the reaction time is presented.
In this paper, we present the design, fabrication and optical characterization of computer-generated holograms (CGH) encoding information for light beams carrying orbital angular momentum (OAM). Through use a numerical code, based on an iterative Fourier transform algorithm, phase-only diffractive element (PH-DOE) specifically designed OAM illumination has been computed, fabricated tested. order to shape incident beam into helicoidal phase profile generate singularities, method transmission...
A model to compute the strain relaxation rate in InxGa1−xAs/GaAs single layers has been tested on several compositionally graded buffer layers. The existence of a critical elastic energy assumed as criterion for generation new misfit dislocations. surface accuracy results are within 2.5×10−4. influence different grading laws and growth conditions residual strain, threading dislocation density, confinement, morphology studied. probability interaction work hardening shown strongly mobility...
The precise C content of a series Si1−yCy epilayer samples (0<y<0.012) was determined by resonant backscattering experiments using He+4 ion beam at 5.72 MeV. This energy is more suitable for the determination than previously used 4.265 From correlation these investigations with x-ray diffraction experiments, significant deviation lattice parameter variation in from Vegard’s rule between Si and diamond or β-SiC observed, which amounts up to 30% 13%, respectively, y<0.012....
Progress in lithography and nanofabrication [E. Di Fabrizio et al., Nature (London) 401, 895 (1999)] has made it possible to apply differential interference contrast (DIC) x-ray microscopy using an original doublet lens based on two specially developed zone plates. Switching from bright-field imaging (absorption contrast) DIC, we observe, similar visible-light microscopy, a dramatic increase image for weak absorbing samples. We anticipate that this technique will have significant impact may...