A. B. Krysa
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View article: Inverse Design of Whispering-Gallery Nanolasers with Tailored Beam Shape and Polarization
Inverse Design of Whispering-Gallery Nanolasers with Tailored Beam Shape and Polarization Open
Control over the shape and polarization of the beam emitted by a laser source is important in applications such as optical communications, optical manipulation and high-resolution optical imaging. In this paper, we present the inverse desi…
View article: Inverse Design of Whispering-gallery Nanolasers with Tailored Beam Shape and Polarization
Inverse Design of Whispering-gallery Nanolasers with Tailored Beam Shape and Polarization Open
Control over the shape and polarization of the beam emitted by a laser source is important in applications such as optical communications, optical manipulation and high-resolution optical imaging. In this paper, we present the inverse desi…
View article: Impact Ionization Coefficients in (Al<sub> <i>x</i> </sub>Ga<sub>1-<i>x</i> </sub>)<sub>0.52</sub>In<sub>0.48</sub>P and Al<sub> <i>x</i> </sub>Ga<sub>1-<i>x</i> </sub>As Lattice-Matched to GaAs
Impact Ionization Coefficients in (Al<sub> <i>x</i> </sub>Ga<sub>1-<i>x</i> </sub>)<sub>0.52</sub>In<sub>0.48</sub>P and Al<sub> <i>x</i> </sub>Ga<sub>1-<i>x</i> </sub>As Lattice-Matched to GaAs Open
The impact ionization characteristics of (Al x Ga 1-x ) 0.52 In 0.48 P have been studied comprehensively across the full composition range. Electron and hole impact ionization coefficients ( α and β, respectively) have been extracted from …
View article: InGaP 2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1958" altimg="si70.svg"><mml:mo>×</mml:mo></mml:math> 2 pixel array for X-ray and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e1963" altimg="si294.svg"><mml:mi>γ</mml:mi></mml:math>-ray spectroscopy
InGaP 2 2 pixel array for X-ray and -ray spectroscopy Open
A 2 × 2 square pixel In0.5Ga0.5P p+-i-n+ mesa photodiode array was fabricated and investigated for its suitability in photon counting X-ray and γ-ray spectroscopy. Each pixel, which had an area of 200μm×200μm and a 5μm thick i layer, was c…
View article: 1GHz clocked distribution of electrically generated entangled photon pairs
1GHz clocked distribution of electrically generated entangled photon pairs Open
Quantum networks are essential for realising distributed quantum computation and quantum communication. Entangled photons are a key resource, with applications such as quantum key distribution, quantum relays, and quantum repeaters. All co…
View article: InGaAs x-ray photodiode for spectroscopy
InGaAs x-ray photodiode for spectroscopy Open
A prototype In 0.53 Ga 0.47 As p + -i-n + x-ray photodiode, fabricated from material grown by metalorganic vapour phase epitaxy, was investigated as a novel detector of x-rays. The detector was connected to a custom low-noise charge sensit…
View article: Al<sub>0.6</sub>Ga<sub>0.4</sub>As x-ray avalanche photodiodes for spectroscopy
Al<sub>0.6</sub>Ga<sub>0.4</sub>As x-ray avalanche photodiodes for spectroscopy Open
Two circular Al0.6Ga0.4As p+-i-n+ 2 µm i layer spectroscopic x-ray avalanche photodiodes (one 200 µm diameter and one 400 µm diameter) were made from a structure produced by metalorganic vapour phase epitaxy. The capacitances and currents …
View article: Gigahertz-Clocked Teleportation of Time-Bin Qubits with a Quantum Dot in the Telecommunication <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>C</mml:mi></mml:math> Band
Gigahertz-Clocked Teleportation of Time-Bin Qubits with a Quantum Dot in the Telecommunication Band Open
Teleportation is a fundamental concept of quantum mechanics with an important application in extending the range of quantum communication channels via quantum relay nodes. To be compatible with real-world technology such as secure quantum …
View article: MOVPE-Grown Quantum Cascade Laser Structures Studied by Kelvin Probe Force Microscopy
MOVPE-Grown Quantum Cascade Laser Structures Studied by Kelvin Probe Force Microscopy Open
A technique for direct study of the distribution of the applied voltage within a quantum cascade laser (QCL) has been developed. The detailed profile of the potential in the laser claddings and laser core region has been obtained by gradie…
View article: Quantum teleportation using highly coherent emission from telecom C-band quantum dots
Quantum teleportation using highly coherent emission from telecom C-band quantum dots Open
A practical way to link separate nodes in quantum networks is to send photons over the standard telecom fibre network. This requires sub-Poissonian photon sources in the wavelength band around 1550 nm, with photon coherence times sufficien…
View article: Supplementary document for 1GHz clocked distribution of electrically generated entangled photon pairs - 4914253.pdf
Supplementary document for 1GHz clocked distribution of electrically generated entangled photon pairs - 4914253.pdf Open
Supplement 1
View article: AlInP photodiode x-ray detectors
AlInP photodiode x-ray detectors Open
Four Al0.52In0.48P p+-i-n+ mesa photodiodes with 6 μm thick i layers and two different diameters (217 μm ± 15 μm and 409 μm ± 28 μm) were studied at room temperature (24 °C). Electrical characterisation measurements are reported along with…
View article: Quantum teleportation using coherent emission from telecom C-band quantum dots
Quantum teleportation using coherent emission from telecom C-band quantum dots Open
A practical way to link separate nodes in quantum networks is to send photons over the standard telecom fibre network. This requires sub-Poissonian photon sources in the telecom wavelength band around 1550 nm, where the photon coherence ti…
View article: Energy response characterization of InGaP X-ray detectors
Energy response characterization of InGaP X-ray detectors Open
Two custom-made In0.5Ga0.5P p+-i-n+ circular mesa spectroscopic X-ray photodiodes with different diameters (200 μm and 400 μm) and a 5 μm i layer have been characterized for their response to X-ray photons within the energy range 4.95 keV …
View article: GaInAs/AlInAs Heteropair Quantum Cascade Laser Operating at a Wavelength of 5.6 μm and Temperature of Above 300K
GaInAs/AlInAs Heteropair Quantum Cascade Laser Operating at a Wavelength of 5.6 μm and Temperature of Above 300K Open
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View article: 6<i>μ</i>m thick AlInP<sup>55</sup>Fe x-ray photovoltaic and<sup>63</sup>Ni betavoltaic cells
6<i>μ</i>m thick AlInP<sup>55</sup>Fe x-ray photovoltaic and<sup>63</sup>Ni betavoltaic cells Open
Two 400 μm diameter Al0.52In0.48P p+-i-n+ mesa photodiodes (6 μm i layer) were fabricated from a wafer grown by metalorganic vapour phase epitaxy (MOVPE) and then studied at temperatures from 140 °C to -20 °C for the development of tempera…
View article: InP/InGaP quantum-dot SESAM mode-locked Alexandrite laser
InP/InGaP quantum-dot SESAM mode-locked Alexandrite laser Open
A semiconductor saturable absorber mirror (SESAM) passively mode-locked Alexandrite laser was demonstrated. Using an InP/InGaP quantum-dot saturable absorber mirror, pulse duration of 420 fs at 774 nm was obtained. The laser was pumped at …
View article: Transmission electron microscopy of AlGaAs/GaAs quantum cascade laser structures
Transmission electron microscopy of AlGaAs/GaAs quantum cascade laser structures Open
Summary Quantum cascade lasers can be efficient infrared radiation sources and consist of several hundreds of very thin layers arranged in stacks that are repeated periodically. Both the thicknesses of the individual layers as well as the …
View article: InGaP (GaInP) mesa p-i-n photodiodes for X-ray photon counting spectroscopy
InGaP (GaInP) mesa p-i-n photodiodes for X-ray photon counting spectroscopy Open
In this paper, for the first time an InGaP (GaInP) photon counting X-ray photodiode has been developed and shown to be suitable for photon counting X-ray spectroscopy when coupled to a low-noise charge-sensitive preamplifier. The character…
View article: Universal Growth Scheme for Quantum Dots with Low Fine-Structure Splitting at Various Emission Wavelengths
Universal Growth Scheme for Quantum Dots with Low Fine-Structure Splitting at Various Emission Wavelengths Open
Efficient sources of individual pairs of entangled photons are required for quantum networks to operate using fiber-optic infrastructure. Entangled light can be generated by quantum dots (QDs) with naturally small fine-structure splitting …
View article: Investigation of a temperature tolerant InGaP (GaInP) converter layer for a<sup>63</sup>Ni betavoltaic cell
Investigation of a temperature tolerant InGaP (GaInP) converter layer for a<sup>63</sup>Ni betavoltaic cell Open
A prototype InGaP p+–i–n+ mesa photodiode was studied for its potential as the energy conversion device in a 63Ni betavoltaic cell; its electrical performance was analysed across the temperature range −20 °C to 100 °C. The results show tha…