Maciej Dems
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View article: Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering
Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering Open
A high-temperature long-wavelength infrared (LWIR) photodetector using a thin InAs/InAsSb type-II superlattice (T2SL) absorber with enhanced optical absorption is demonstrated. The enhancement results from the excitation of planar waveguid…
View article: Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering
Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering Open
A high-temperature long-wavelength infrared (LWIR) photodetector based on a thin InAs/InAsSb type-II superlattice (T2SL) absorber is presented, utilizing enhanced optical absorption. This enhancement arises from the excitation of planar wa…
View article: Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering
Absorption enhancement in LWIR detector via waveguide and plasmonic modes engineering Open
A high-temperature long-wavelength infrared (LWIR) photodetector based on a thin InAs/InAsSb type-II superlattice (T2SL) absorber is presented, utilizing enhanced optical absorption. This enhancement arises from the excitation of planar wa…
View article: Optimized surface gratings for high-speed polarization switching in spin-VCSELs
Optimized surface gratings for high-speed polarization switching in spin-VCSELs Open
Vertical-cavity surface-emitting lasers are limited to 30–50 GHz in conventional intensity modulation. Polarization modulation offers a promising alternative, exploiting birefringence-induced oscillations at much higher frequencies. We use…
View article: Thermal Optimization of Edge-Emitting Lasers Arrays
Thermal Optimization of Edge-Emitting Lasers Arrays Open
This paper presents a novel approach to address the issue of uneven temperature distribution in one-dimensional laser arrays, specifically in gallium nitride edge-emitting lasers emitting green light of 540 nm. The results were obtained us…
View article: Thermal Optimization of Edge Emitting Lasers Arrays
Thermal Optimization of Edge Emitting Lasers Arrays Open
The paper presents a novel approach to address the issue of uneven temperature distribution in one-dimensional laser arrays, specifically in gallium nitride edge-emitting lasers emitting green light of 540 nm. The results were obtained usi…
View article: Increasing Single-Mode Power in VCSELs With Antiresonant Oxide Island
Increasing Single-Mode Power in VCSELs With Antiresonant Oxide Island Open
This article focuses on increasing the single-mode power in Vertical Cavity Surface Emitting Lasers (VCSELs) through the strategic integration of an antiresonant oxide islands. Using a gallium arsenide-based VCSEL as a case study, we explo…
View article: Rigorous optical modelling of long-wavelength infrared photodetector with 2D subwavelength hole array in gold film
Rigorous optical modelling of long-wavelength infrared photodetector with 2D subwavelength hole array in gold film Open
The quantum efficiency of an InAs/InAsSb type-II superlattice (T2SL) high operating temperature (HOT) long-wavelength infrared (LWIR) photodetector may be significantly improved by integrating a two-dimensional subwavelength hole array in …
View article: Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing
Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing Open
Highly reflective mirrors are indispensable components in a variety of state-of-the-art photonic devices. Typically used, bulky, multi-layered distributed Bragg (DBR) reflectors are limited to lattice-matched semiconductors or nonconductiv…
View article: Concept of Inverted Refractive-Index-Contrast Grating Mirror and Exemplary Fabrication by 3D Microprinting
Concept of Inverted Refractive-Index-Contrast Grating Mirror and Exemplary Fabrication by 3D Microprinting Open
Highly reflective mirrors are indispensable components in a variety of state-of-the-art photonic devices. Typically used, bulky, multi-layered distributed Bragg (DBR) reflectors are limited to lattice-matched semiconductors or nonconductiv…
View article: Data associated with the manuscript "Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing" by E. Pruszyńska-Karbownik et al., Nanohotonics 12, 3579 (2023).
Data associated with the manuscript "Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing" by E. Pruszyńska-Karbownik et al., Nanohotonics 12, 3579 (2023). Open
Data associated with the manuscript "Concept of inverted refractive-index-contrast grating mirror and exemplary fabrication by 3D laser micro-printing" by E. Pruszyńska-Karbownik et al., Nanohotonics 12, 3579 (2023).
View article: Threshold performance of pulse-operating quantum-cascade vertical-cavity surface-emitting lasers
Threshold performance of pulse-operating quantum-cascade vertical-cavity surface-emitting lasers Open
Quantum-cascade (QC) vertical-cavity surface-emitting lasers (VCSELs) could combine the single longitudinal mode operation, low threshold currents, circular output beam, and on-wafer testing associated with VCSEL configuration and the unpr…
View article: Time-Dependent Laser Cavity Perturbation Theory: Exploring Future Nano-Structured Photonic Devices in Semi-Analytic way
Time-Dependent Laser Cavity Perturbation Theory: Exploring Future Nano-Structured Photonic Devices in Semi-Analytic way Open
We present a theoretical framework, which successfully combines two different fields of photonics: i) the laser rate equations and ii) the cavity perturbation theory, focusing particularly on micro-cavity lasers with optical anisotropies. …
View article: Convergence analysis of various factorization rules in the Fourier-Bessel basis for solving Maxwell equations using modal methods
Convergence analysis of various factorization rules in the Fourier-Bessel basis for solving Maxwell equations using modal methods Open
The choice of factorization rule can strongly affect the convergence of solutions to Maxwell equations based on the orthogonal expansion of electromagnetic fields. While this issue has already been investigated thoughtfully for the Fourier…
View article: Planar focusing reflectors based on monolithic high contrast gratings: design procedure and comparison with parabolic mirrors
Planar focusing reflectors based on monolithic high contrast gratings: design procedure and comparison with parabolic mirrors Open
Here, we describe in detail a procedure for the numerical design of planar focusing mirrors based on monolithic high contrast gratings. We put a special emphasis on the reconstruction of the hyperbolic phase of these mirrors and we conclud…
View article: Transparent electrode employing deep–subwavelength monolithic high-contrast grating integrated with metal
Transparent electrode employing deep–subwavelength monolithic high-contrast grating integrated with metal Open
This paper demonstrates designs of transparent electrodes for polarized light based on semiconductor deep-subwavelength monolithic high-contrast gratings integrated with metal (metalMHCG). We provide theoretical background explaining the p…
View article: Tuning of reflection spectrum of a monolithic high-contrast grating by variation of its spatial dimensions
Tuning of reflection spectrum of a monolithic high-contrast grating by variation of its spatial dimensions Open
We report the first experimental parametric analysis of subwavelength monolithic high-contrast grating (MHCG) mirrors. To date, subwavelength grating mirrors have been fabricated by suspending a thin grating membrane in the air or placing …
View article: Impact of an Antiresonant Oxide Island on the Lasing of Lateral Modes in VCSELs
Impact of an Antiresonant Oxide Island on the Lasing of Lateral Modes in VCSELs Open
Use of antiresonant structures is a proven, efficient method of improving lateral mode selectivity in VCSELs. In this paper, we analyze the impact of a low-refractive antiresonant oxide island buried in a top VCSEL mirror on the lasing con…
View article: Numerical Investigation of the Impact of ITO, AlInN, Plasmonic GaN and Top Gold Metalization on Semipolar Green EELs
Numerical Investigation of the Impact of ITO, AlInN, Plasmonic GaN and Top Gold Metalization on Semipolar Green EELs Open
In this paper, we present the results of a computational analysis of continuous-wave (CW) room-temperature (RT) semipolar InGaN/GaN edge-emitting lasers (EELs) operating in the green spectral region. In our calculations, we focused on the …
View article: ITO layer as an optical confinement for nitride edge-emitting lasers
ITO layer as an optical confinement for nitride edge-emitting lasers Open
This paper presents the results of a numerical analysis of nitride-based edge-emitting lasers with an InGaN/GaN active region designed for continuous wave room temperature emission of green and blue light. The main goal was to investigate …
View article: Influence of Various Bottom DBR Designs on the Thermal Properties of Blue Semiconductor-Metal Subwavelength-Grating VCSELs
Influence of Various Bottom DBR Designs on the Thermal Properties of Blue Semiconductor-Metal Subwavelength-Grating VCSELs Open
In this paper, we consider several designs for nitride-based vertical-cavity surface-emitting lasers (VCSELs) with a top semiconductor-metal subwavelength grating (SMSG) as the facet mirror. The constructions of the bottom distributed Brag…
View article: Subwavelength high contrast gratings as optical sensing elements
Subwavelength high contrast gratings as optical sensing elements Open
Subwavelength high contrast gratings (HCG) can be used as high reflective mirrors and can be used as mirrors of vertical-cavity surface-emitting lasers. HCG mirrors can be designed in such a way that they are extremely sensitive to environ…
View article: Comparison of methods for simulation of the optical properties of VCSEls
Comparison of methods for simulation of the optical properties of VCSEls Open
This paper presents the differences arising from the use of scalar (Effective Frequency Method) and vector (Fourier’s and Bessel’s Admittance Methods) calculation methods in optical analysis of arsenide Vertical-Cavity Surface-Emitting Las…
View article: Coupled-cavity AlInAs/InGaAs/InP quantum cascade lasers fabricated by focused ion beam processing
Coupled-cavity AlInAs/InGaAs/InP quantum cascade lasers fabricated by focused ion beam processing Open
Focused ion beam processing has been applied to fabricate coupled-cavity AlInAs/InGaAs/InP quantum cascade lasers. The evolution of the mode spectrum of the two coupled Fabry–Perot cavities, controlled by the driving currents of both secti…
View article: Optimization of broadband semiconductor chirped mirrors with genetic algorithm
Optimization of broadband semiconductor chirped mirrors with genetic algorithm Open
Genetic algorithm was applied for optimization of dispersion properties in semiconductor Bragg reflectors for applications in femtosecond lasers. Broadband, large negative group-delay dispersion was achieved in the optimized design: The gr…