A5058185569- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Fiber Optic Sensors
- Telecommunications and Broadcasting Technologies
- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Metamaterials and Metasurfaces Applications
- Optical Wireless Communication Technologies
- Photonic Crystal and Fiber Optics
- Spectroscopy and Laser Applications
- Advanced MIMO Systems Optimization
- Quantum Mechanics and Non-Hermitian Physics
- Advanced Antenna and Metasurface Technologies
- Photonic Crystals and Applications
- Neural Networks and Reservoir Computing
- Mechanical and Optical Resonators
- Error Correcting Code Techniques
- Antenna Design and Analysis
- Terahertz technology and applications
- Power Line Communications and Noise
- Satellite Communication Systems
Riga Technical University
2016-2025
nLIGHT (United States)
2025
KTH Royal Institute of Technology
2022
Tel Aviv University
2022
Institute of Electrical and Electronics Engineers
2022
Transport and Telecommunication Institute
2012
We study the Mie-like scattering from an open subwavelength resonator made of a high-index dielectric material, when its parameters are tuned to regime interfering resonances. uncover novel mechanism superscattering, closely linked strong coupling resonant modes and described by physics bound states in continuum (BICs). demonstrate that enhanced occurs due constructive interference Friedrich-Wintgen resonances, allowing push cross section multipole resonance beyond currently established...
Exceptional points are spectral singularities of open systems, where several eigenvalues and eigenvectors coalesce. In photonics, they associated to remarkable phenomena, such as unidirectional scattering, enhanced sensing or chiral mode conversion. this work, we study scattering electromagnetic waves by a single dielectric nanoparticle observe the appearance exceptional in its eigenvalue spectrum. Their existence is linked breaking mirror symmetry particle. Remarkably, mark onset from weak...
Abstract Modern nanophotonics has witnessed the rise of “electric anapoles” (EDAs), destructive interferences electric and toroidal dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, inherent duality in Maxwell equations suggests intriguing possibility “magnetic anapoles,” involving a nonradiating composition magnetic dipole dipole. Here, hybrid anapole (HA) mixed character is predicted observed experimentally via dark field spectroscopy, with all...
Public road infrastructure is developed all around the world. To save resources, ensure public safety, and provide longer-lasting infrastructure, structural health monitoring (SHM) applications for roads have to be researched developed. Asphalt one of largest used surface materials building industry. This material also provides relatively easy fiber optical sensor technology installment, which can effectively SHM applications—road as well resource optimization when or their repairs are...
Since about one and half centuries ago, at the dawn of modern communications, radio optics have been two separate electromagnetic spectrum regions to carry data. Differentiated by their generation/detection methods propagation properties, paths evolved almost independently until today. The optical technologies dominate long-distance high-speed terrestrial wireline communications through fiber-optic telecom systems, whereas mainly dominated short- medium-range wireless scenarios. Now, these...
All-dielectric nanophotonics opens a venue for variety of novel phenomena and scattering regimes driven by unique optical effects in semiconductor dielectric nanoresonators. Their peculiar signatures enabled simultaneous electric magnetic responses the visible range pave way plenty new applications nano-optics, biology, sensing, etc. In this work, we investigate fabrication-friendly truncated cone resonators achieve several important due to inherent property cones-broken symmetry along main...
Abstract The propulsion and acceleration of nanoparticles with light have both fundamental applied significance across many disciplines. Needle‐free injection biomedical nano cargoes into living tissues is among the examples. Here a new physical mechanism laser‐induced particle explored, based on abnormal optothermal expansion mesoporous vaterite cargoes. Vaterite nanoparticles, metastable form calcium carbonate, are placed substrate, underneath target phantom, accelerated toward it aid...
Abstract Multipoles are paramount for describing electromagnetic fields in many areas of nanoscale optics, playing an essential role the design devices plasmonics and all‐dielectric nanophotonics. Challenging traditional division into electric magnetic moments, toroidal moments proposed as a physically distinct family multipoles with significant contributions to properties matter. However, apparent impossibility separately measuring their response sheds doubt on true physical significance....
Increased demand of consumers on services in the mobile environment with high data rate and technologically developed broadband communication systems will require more spectrum to be available future. The new technologies frequencies for their development usage. One main objectives fifth generation (5G) systems, known also as IMT-2020, is increase current rates up several gigabits per second (Gbit/s) even than 10 Gbit/s. possibility consider use higher order bandwidth, which necessary...
Abstract All-dielectric nanophotonics has become one of the most active fields research in modern optics, largely due to opportunities offered by simultaneous resonant control electric and magnetic components light at nanoscale. In this rapidly evolving scenario, possibility design artificial Huygens sources overlapping resonances established a new paradigm flat bringing devices closer efficient wavefront shaping with direct phase engineering level individual meta-atoms. However, their...
The radar-centric terahertz integrated sensing and communication (THz-ISAC) is identified as a significant application in future wireless access networks. Up to date, previously reported demonstrations regarding radar performance lack sufficient support complex environment with strong target masking effect. This work tacks this problem by proposing waveform combining linear frequency modulation (LFM) phase shift keying (PSK). We first derive metrics of the LFM-PSK through theoretical...
Abstract Nickel oxide is a promising material for transparent electronics applications. This semiconductor demonstrates the possibility of modifying its physical properties depending on method growth and subsequent processing. Here effects discharge power are reported during reactive dc magnetron sputtering, as well modes annealing NiO films, their structural, electrical, optical properties. films annealed at various temperatures both in an oxygen‐containing environment under vacuum...
Free-space optics (FSO) in the mid-infrared (mid-IR) contains rich spectral resources for future ultrahigh-speed wireless communications yet is currently under-exploited. Two atmospheric transmission windows at mid-IR, namely, mid-wave IR (MWIR, 3–5 μm) and long-wave (LWIR, 8–12 μm), show great potential supporting free-space both terrestrial space application scenarios. Particularly, LWIR signal with a longer wavelength has high intrinsic robustness against aerosols' scattering...
The plasmonic sensors based on silver nanoparticles are limited in application due to their relatively fast degradation the ambient atmosphere. technology of ion-beam modification for creation monocrystalline (NPs) with stable properties will expand nanostructures. In present study, highly-stable NPs were formed basis a thin film by low-energy ion irradiation. Combined lithography, this technique allows nanoparticle ensembles variant forms. characterization showed long-term outstanding Ag...
A roadmap for future wireless communications is expected to exploit all transmission-suitable spectrum bands, from the microwave optical frequencies, support orders of magnitude faster data transfer with much lower latency than deployed solutions nowadays. The currently under-exploited mid-infrared (mid-IR) an essential building block such envisioned all-spectra communication paradigm. Free-space (FSO) in mid-IR region have recently attracted great interest due their intrinsic merits low...
Bound states in the continuum (BICs) enable unique features tailoring light-matter interaction on nanoscale. These radiationless localized drive theoretically infinite quality factors and lifetimes for modern nanophotonics, making room a variety of emerging applications. Here we use peculiar properties possessed by so-called $\mathcal{PT}$ symmetric optical structures to propose novel mechanism quasi-BIC manifestation governed symmetry breaking. In particular, study regularities spontaneous...
Fiber Bragg grating (FBG) optical sensors are state-of-the-art technology that can be integrated into the road structure, providing real-time traffic-induced strain readings and ensuring monitoring of road's structural health. By implementing specific FBG sensors, it is possible to detect each vehicle's axle count induced changes in structure. In this study, embedded at top 240-mm-thick cement-treated reclaimed asphalt pavement mixture layer (specifically, 25 mm deep within road). Optical...
We demonstrate a record 240 Gbaud on-off keying, 150 4-level pulse amplitude modulation, and 100 6-level modulation SiP MZM-based transmitter with performance below the 6.25% overhead HD-FEC threshold. also show 160 keying RRM-based transmitter.
The recent AI boom requires more focus on energy-efficient and scalable optical interconnects. Silicon Photonics is enabling technology to satisfy growing demand. However, the lack of lasers high-performance modulators hinders wide-scale adoption. Therefore, we present a heterogeneously integrated Indium Phosphide electro-absorption modulator with waveguides. We demonstrate up 256 Gb/s on-off keying, 340 4-level pulse amplitude modulation, 375 6-level 360 8-level modulation transmission over...
Abstract The capability to tailor mutual interactions between colloidal nanoparticles strongly depends on the length scales involved. While electrostatic and optomechanically driven can cover nano micron‐scale landscapes, controlling inter‐particle dynamics at larger distances remains challenging. Small physical electromagnetic cross‐sections of make long‐range interactions, screened by a fluid environment, inefficient. To bypass limitations, we demonstrated that forming bubbles around...
This research presents a novel approach to 28 GHz impulse radio ultra-wideband (IR-UWB) transmission using pulse position modulation (PPM) over an analog radio-over-fiber (ARoF) link, investigating the impact of fiber-based fronthaul on overall performance communication system. In this setup, arbitrary waveform generator (AWG) is employed for PPM signal generation, while demodulation performed with commercial time-to-digital converter (TDC) based event timer. To enhance reliability...
The dramatic growth of transmitted information in fiber optical networks is leading to a concern about the network latency for high-speed reliable services like financial transactions, telemedicine, virtual and augmented reality, surveillance, other applications. In order ensure effective engineering, delay variability needs be accurately monitored measured, control it. This paper brief describes causes metro networks. Several available reduction techniques solutions are also discussed,...
Market forecasts and trends for the usage of fiber optical sensors confirm that demand them will continue to increase in near future. This article focuses on research Bragg grating (FBG) sensor network, their applications IoT structural health monitoring (SHM), especially coexistence with existing communication system infrastructure. Firstly, spectrum available commercial FBG temperature was experimentally measured amplitude-frequency response data acquired further develop simulation model...
With the progress of high-capacity radio access networks, ultra-dense small cells are rapidly being deployed in urban areas. As a result, deployment large number optical fibers areas becomes severe issue. In this Letter, we propose hybrid fiber-terahertz (THz) mobile fronthaul system supporting flexible and high-order wireless signal transmission with delta-sigma modulation. The photonic THz is used as seamless extension fiber-based cells. A 20-Gbit/s digital fiber-THz experimentally...