Piotr Sobotka
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View article: Liquid-crystal adaptive equivalent q-plate device with tunable topological charge
Liquid-crystal adaptive equivalent q-plate device with tunable topological charge Open
In this work we present the proof-of-concept of what we believe to be a novel liquid-crystal compact and transmissive device useful to generate cylindrical vector beams (CVBs) of tunable topological charge. The device combines two adaptive…
View article: Utilization of Ultraviolet C Light-Emitting Diodes for the Deactivation of SARS-CoV-2 in Human Breath
Utilization of Ultraviolet C Light-Emitting Diodes for the Deactivation of SARS-CoV-2 in Human Breath Open
Ultraviolet light has a long track record when it comes to use for deactivating harmful microorganisms. With recent developments in LED technology in terms of generating electromagnetic waves from this specific spectral range, new applicat…
View article: Sensitivity and Performance of Uncooled Avalanche Photodiode for Thermoluminescent Dosimetry Applications
Sensitivity and Performance of Uncooled Avalanche Photodiode for Thermoluminescent Dosimetry Applications Open
Detecting extremely low light signals is the basis of many scientific experiments and measurement techniques. For many years, a high-voltage photomultiplier has been the only practical device used in the visible and infrared spectral range…
View article: Novel Electrically Controlled Periodic Optical Structures in the LC:PDMS Architecture
Novel Electrically Controlled Periodic Optical Structures in the LC:PDMS Architecture Open
Optofluidics is a constantly developing research area that combines known technologies from chemistry and photonics. Various systems have been created, which are used in biology and chemistry as well as in other subjects. The combination o…
View article: A Novel Approach for the Creation of Electrically Controlled LC:PDMS Microstructures
A Novel Approach for the Creation of Electrically Controlled LC:PDMS Microstructures Open
This work presents research on unique optofluidic systems in the form of air channels fabricated in PDMS and infiltrated with liquid crystalline material. The proposed LC:PDMS structures represent an innovative solution due to the use of m…
View article: Study of PDMS Microchannels for Liquid Crystalline Optofluidic Devices in Waveguiding Photonic Systems
Study of PDMS Microchannels for Liquid Crystalline Optofluidic Devices in Waveguiding Photonic Systems Open
Microchannels in LC:PDMS structures must be of good quality and suitable geometry to achieve the desired orientation of the liquid crystalline molecules inside. When applying a casting technique, with the molds obtained even by the most ac…
View article: Three-Dimensional-Printed Mechanical Transmission Element with a Fiber Bragg Grating Sensor Embedded in a Replaceable Measuring Head
Three-Dimensional-Printed Mechanical Transmission Element with a Fiber Bragg Grating Sensor Embedded in a Replaceable Measuring Head Open
Compliant mechanisms have gained an increasing interest in recent years, especially in relation to the possibility of using 3D printers for their production. These mechanisms typically find applications in precise positioning systems of bu…
View article: Effect of Ultraviolet Light C (UV-C) Radiation Generated by Semiconductor Light Sources on Human Beta-Coronaviruses’ Inactivation
Effect of Ultraviolet Light C (UV-C) Radiation Generated by Semiconductor Light Sources on Human Beta-Coronaviruses’ Inactivation Open
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has completely disrupted people’s lives. All over the world, many restrictions and precautions have been introduced to reduce the spread of coronavirus disease 2019 …
View article: Orientation of Liquid Crystalline Molecules on PDMS Surfaces and within PDMS Microfluidic Systems
Orientation of Liquid Crystalline Molecules on PDMS Surfaces and within PDMS Microfluidic Systems Open
The unique components of PDMS-based microfluidic systems are those combined with liquid crystalline materials. Their functionality, especially when it comes to optical applications, highly depends on the LC molecular arrangement. This work…
View article: Efficient reading of thermoluminescent dosimeter signals using semiconductor detectors
Efficient reading of thermoluminescent dosimeter signals using semiconductor detectors Open
The aim of this experimental work was to examine whether semiconductor photodetectors may be applied for the efficient reading of thermoluminescent dosimeter (TLD) signals. For this purpose, a series of experiments have been performed at t…
View article: UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials
UV Sensor Based on Fiber Bragg Grating Covered with Graphene Oxide Embedded in Composite Materials Open
Polymer–matrix composites degrade under the influence of UV radiation in the range of the 290–400 nm band. The degradation of polymer–matrix composites exposed to UV radiation is characterized by extensive aging of the epoxy matrix, result…
View article: Hybrid Fiber Optic Sensor Systems in Structural Health Monitoring in Aircraft Structures
Hybrid Fiber Optic Sensor Systems in Structural Health Monitoring in Aircraft Structures Open
‘Smart’ structural health monitoring of composite materials with optical fiber sensors is becoming more and more important, especially in the aviation industry. This paper presents an overview of hybrid fiber-optic sensing systems based on…
View article: Low-cost, widespread and reproducible mold fabrication technique for PDMS-based microfluidic photonic systems
Low-cost, widespread and reproducible mold fabrication technique for PDMS-based microfluidic photonic systems Open
In this letter the possibility of low-cost fabrication of molds for PDMS-based photonic microstructures is considered. For this purpose, three different commercially available techniques, namely UV-curing of the capillary film, 3D SLA prin…
View article: Terahertz diffractive structures for compact in-reflection inspection setup
Terahertz diffractive structures for compact in-reflection inspection setup Open
Two diffractive optical elements are used to create a compact raster THz scanning setup in reflective configuration. The first one focuses the radiation into the small focal spot on the sample, while the second one collects reflected radia…
View article: Andriej Anatoliewicz Zalizniak (1935–2017). „Po prostu geniusz”
Andriej Anatoliewicz Zalizniak (1935–2017). „Po prostu geniusz” Open
View article: Fiber Bragg grating as UVA sensor
Fiber Bragg grating as UVA sensor Open
The idea of this paper implies the possibility to exploit the properties of graphene oxide (GO) to fiber Bragg grating (FBG) UVA radiation sensor design. The idea assumes that a temperature change around the fiber can be induced by UVA rad…
View article: Antynomia, katabaza i morskie wędrówki...
Antynomia, katabaza i morskie wędrówki... Open
View article: EP-1527: A phantom for brachytherapy treatment planning systems verification with the ArcCHECK® device
EP-1527: A phantom for brachytherapy treatment planning systems verification with the ArcCHECK® device Open
View article: Innovative UV sensor based on highly birefringent fiber covered by graphene oxide
Innovative UV sensor based on highly birefringent fiber covered by graphene oxide Open
innovative idea of this paper implies the possibility to exploit the properties of graphene oxide (GO) to UV radiation sensor design. idea assumes that a temperature change around the fiber can be induced by UV radiation. Particular atten…