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Designing rectangular surface Bragg gratings using machine learning models
/en/research/publications/designing-rectangular-surface-bragg-gratings-using-machine-learning-models
In this paper, we demonstrate a possibility to predict the characteristics of semiconductor-based Bragg gratings using machine learning methods. We perform 2D simulations of the Bragg gratings and…
Finite-Difference Time-Domain Simulations of Surface Bragg Gratings
/en/research/publications/finite-difference-time-domain-simulations-of-surface-bragg-gratings
Bragg gratings are an essential component of semiconductor lasers. One of the most precise methods to calculate an optical response of such a component is the 3D FDTD method. However, due to its…
Micro-integrated optical isolators for visible wavelengths for space application
/en/research/publications/micro-integrated-optical-isolators-for-visible-wavelengths-for-space-application
Micro-integrated optical isolators for visible wavelengths for space application M. Kaufera, A. Baatzscha, M. Herdinga, K. Nicklausa, C. Tyborskib, A. Bawamiab,…
Operational Lifetime Qualification of Laser Diodes for BECCAL
/en/research/publications/operational-lifetime-qualification-of-laser-diodes-for-beccal
Operational Lifetime Qualification of Laser Diodes for BECCAL K. Häusler, A. Bawamia, J. Boschker, J.M. Baumann, M. Dammasch, H. Wenzel, A. Knigge, J. Fricke,…
In-orbit verification of an optical frequency reference on the ISS Bartolomeo platform
/en/research/publications/in-orbit-verification-of-an-optical-frequency-reference-on-the-iss-bartolomeo-platform
In-orbit verification of an optical frequency reference on the ISS Bartolomeo platform T. Schuldta, K. Abicha, T. Alama, J. Bischofa, T. Blomberga, L. Blümelb,…
Micro-integrated optical systems and qualification of adhesive integration technologies for cold atomic quantum sensors
/en/research/publications/micro-integrated-optical-systems-and-qualification-of-adhesive-integration-technologies-for-cold-atomic-quantum-sensors
Micro-integrated optical systems and qualification of adhesive integration technologies for cold atomic quantum sensors M. Christa,b, A. Stiekela,b, C. Stölmackera,…
Impact of Plasma Treatment of n-Al0.87Ga0.13N:Si Surfaces on V/Al/Ni/Au Contacts in Far-UVC LEDs
/en/research/publications/impact-of-plasma-treatment-of-n-al087ga013nsi-surfaces-on-valniau-contacts-in-far-uvc-leds
We investigated the effect of treating the surface of n-Al0.87Ga0.13N:Si by O2 or SF6 plasma on the properties of subsequently deposited and annealed V/Al/Ni/Au contacts. Whereas an O2 plasma…
Analysis of Mechanical Strain in AlGaN/GaN HFETs
/en/research/publications/analysis-of-mechanical-strain-in-algangan-hfets
Herein, the influence of mechanical strain induced by passivation layers on the electrical performance of AlGaN/GaN heterostructure field-effect transistor is investigated. We studied the physical…
Radiative Recombination and Carrier Injection Efficiencies in 265 nm Deep Ultraviolet Light-Emitting Diodes Grown on AlN/Sapphire Templates with Different Defect Densities
/en/research/publications/radiative-recombination-and-carrier-injection-efficiencies-in-265nm-deep-ultraviolet-light-emitting-diodes-grown-on-alnsapphire-templates-with-different-defect-densities
The electro-optical characteristics of deep ultraviolet light-emitting diodes (DUV LEDs) emitting at 265 nm and grown on AlN/sapphire templates with different threading dislocation densities,…
Athermalization of the Lasing Wavelength in Vertical-Cavity Surface-Emitting Lasers
/en/research/publications/athermalization-of-the-lasing-wavelength-in-vertical-cavity-surface-emitting-lasers
A concept for vertical-cavity surface-emitting lasers (VCSELs) is proposed and demonstrated to obtain a lasing wavelength with unprecedented temperature stability. The concept is based on…