A5035420177- Strong Light-Matter Interactions
- Photonic and Optical Devices
- 2D Materials and Applications
- Advanced Semiconductor Detectors and Materials
- Mechanical and Optical Resonators
- Semiconductor Quantum Structures and Devices
- Neural Networks and Reservoir Computing
- Topological Materials and Phenomena
- Graphene research and applications
- Quantum and electron transport phenomena
- Perovskite Materials and Applications
- Spectroscopy and Laser Applications
- Quantum Dots Synthesis And Properties
- Advanced Optical Sensing Technologies
- Plasmonic and Surface Plasmon Research
- Quantum Information and Cryptography
- Calibration and Measurement Techniques
- Photoreceptor and optogenetics research
- CCD and CMOS Imaging Sensors
- Physics of Superconductivity and Magnetism
- Advanced Measurement and Detection Methods
- Molecular Junctions and Nanostructures
- MXene and MAX Phase Materials
- Heusler alloys: electronic and magnetic properties
- Laser Design and Applications
Vigo System (Poland)
2024-2025
University of Warsaw
2017-2023
Institute of Electron Technology
2016-2017
Monolayer transition-metal dichalcogenides (TMDs) manifest exceptional optical properties related to narrow excitonic resonances. However, these have been so far explored only for structures produced by techniques inducing considerable large-scale inhomogeneity. In contrast, which are essentially free from this disadvantage, such as molecular beam epitaxy (MBE), date yielded characterized spectral broadening, hinders most of the interesting effects. Here, we report first time on MBE-grown...
The rapid development of artificial neural networks and applied intelligence has led to many applications. However, current software implementation is severely limited in terms performance energy efficiency. It believed that further progress requires the neuromorphic systems, which hardware directly mimics neuronal network structure a human brain. Here, we propose theoretically realize experimentally an optical nodes performing binary operations. nonlinearity required for efficient...
In this work, we observe natural exceptional points in the excitation spectrum of an exciton–polariton system by optically tuning light–matter interactions. The observed do not require any spatial or polarization degrees freedom and result solely from transition weak to strong coupling. It was demonstrated that they coincide with threshold for photon lasing, confirming previous theoretical predictions [ Phys. Rev. Lett. 122 , 185301 ( 2019 ) PRLTAO 0031-9007 10.1103/PhysRevLett.122.185301...
Four types of barrier detectors based on a type II InAs/InAsSb superlattice with wide-gap made solid AlInAsSb lattice matched to the GaSb buffer were compared. The tested differed in doping active layer and level contact at barrier. epitaxial layers deposited GaAs (100) substrates using molecular beam epitaxy method. spectral current–voltage characteristics analyzed highest current responsivities observed structure p-type absorber (p+BpN+). Detectors an n-type (p+Bnn+, n+Bnn+, nBnn+) show...
Thin crystalline layers of TaAs Weyl semimetal are grown by molecular beam epitaxy on GaAs(001) substrates. The (001) planes the tetragonal lattice parallel to substrate, but corresponding in-plane crystallographic directions substrate and layer rotated 45°. In spite a substantial mismatch (about 19%) between epilayer, no misfit dislocations observed at GaAs(001)/TaAs(001) interface. Only stacking fault defects in detected transmission electron microscopy. Thorough X-ray diffraction...
The perfect structure of a 2H-MoTe<sub>2</sub> bilayer <italic>in situ</italic> capped with an ultra-thin Al layer providing excellent AlO<sub>x</sub> protection cap and long timescale stability when exposed to air nitrogen atmospheres.
Abstract This paper introduces a new approach to neuromorphic photonics in which microcavities exhibiting strong exciton–photon interaction may serve as building blocks of optical spiking neurons. The experimental results demonstrate the intrinsic property exciton–polaritons resemble Leaky Integrate‐and‐Fire (LIF) mechanism. It is shown that exciton–polariton when non‐resonantly pumped with pulsed laser exhibit leaky integration due relaxation excitonic reservoir, threshold‐and‐fire...
We investigate the spin polarization of localized exciton-polariton condensates. demonstrate presence an effective magnetic field leading to formation elliptically polarized show that this synthetic has entirely photonic origin, which we believe is unique for CdTe-based microcavities. Moreover, degree polariton condensates in samples with ions depends on excitation power or non-resonant laser. In external field, semimagnetic condensate spontaneously builds up strong polarization. Based...
Exciton–polaritons in optical cavities exhibit strong nonlinearities predominantly because of the third-order Kerr-like interactions mediated by excitonic component. Under quasi-resonant excitation, depending on energy incident laser, it results limiting or bistable behavior. The latter phenomenon is manifested hysteresis loop observed input–output power characteristics, when a cavity quasi-resonantly driven laser field. direction typically counterclockwise increasing and subsequently...
The lattice mismatch between interesting 2D materials and commonly available 3D substrates is one of the obstacles in epitaxial growth monolithic 2D/3D heterostructures, but a number have not yet been considered for epitaxy. Here, we present first molecular beam epitaxy NiTe2 transition-metal dichalcogenide. Importantly, realized on nearly lattice-matched GaAs(111)B substrate. Structural properties grown layers are investigated by electron diffraction, X-ray scanning tunneling microscopy....
Opaque substrates precluded, so far, transmission studies of II-VI semiconductor microcavities. This work presents the design and molecular beam epitaxy growth semimagnetic (Cd,Zn,Mn)Te quantum wells embedded into a (Cd,Zn,Mg)Te-based microcavity, which can be easily separated from GaAs substrate. Our lift-off process relies on use MgTe sacrificial layer stratifies in contact with water. allowed us to achieve microcavity prepared for measurements. We evidence strong light-matter coupling...
We demonstrate that time-delayed nonlinear effects in exciton-polaritons can be used to construct neural networks where information is coded optical pulses arriving consecutively on the sample. The highly are induced by time-dependent interactions with excitonic reservoir. These nonlinearities allow create a XOR logic gate perform operations picosecond timescale. An optoelectronic network based constructed performs classification of spoken digits high accuracy rate.
The long-wave infrared (LWIR) interband cascade detector with type-II superlattices (T2SLs) and a gallium-free (“Ga-free”) InAs/InAsSb (x = 0.39) absorber was characterized by photoluminescence (PL) spectral response (SR) methods. Heterostructures were grown molecular beam epitaxy (MBE) on GaAs substrate (001) orientation. crystallographic quality confirmed high-resolution X-Ray diffraction (HRXRD). Two independent methods, combined theoretical calculations, able to determine the transitions...
In this paper, the design and technology of two types 16-element photodiode arrays is described. The were developed by ITE are to be used in detection microdeflection laser radiation at Institute Metrology Biomedical Engineering Faculty Mechatronics Warsaw University Technology. electrical photoelectrical parameters presented.
In this paper a concept of new bulk structure p<sup>+</sup>-<i>υ</i>-n<sup>+</sup> silicon photodiodes optimized for the detection fast-changing radiation at 1064 nm wavelength is presented. The design and technology two types quadrant photodiodes, 8-segment photodiode 32-element linear array that were developed according to are described. Electric photoelectric parameters mentioned above
Critical current and current-voltage characteristics of epitaxial Nb(Ti)N submicron ultrathin structures were measured as function temperature. For 700-nm-wide bridge we found current-driven vortex de-pinning at low temperatures thermally activated flux flow closer to the transition temperature, limiting factors for critical density. 100-nm-wide meander observed combination phase-slip activation vortex-anti-vortex pair (VAP) thermal excitation. Our structure demonstrates high de-pairing...