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The quest for ultraviolet vertical-cavity surface-emitting lasers
/forschung/publikationen/the-quest-for-ultraviolet-vertical-cavity-surface-emitting-lasers
We daily rely upon vertical-cavity surface-emitting lasers (VCSELs) for facial recognition and data communication. These lasers are now experiencing exponential growth and serves in other…
UV generation via periodically poled MgO:LiTaO3 circular waveguide crystal and diode-based master oscillator power amplifier
/forschung/publikationen/uv-generation-via-periodically-poled-mgolitao3-circular-waveguide-crystal-and-diode-based-master-oscillator-power-amplifier
Lasers with emission wavelengths in the near-ultraviolet (UV) spectral range have been used in many applications across various fields, and the demand for these lasers has been on the rise. For…
Proposal for a long-lived quantum memory using matter-wave optics with Bose-Einstein condensates in microgravity
/forschung/publikationen/proposal-for-a-long-lived-quantum-memory-using-matter-wave-optics-with-bose-einstein-condensates-in-microgravity
Bose-Einstein condensates are a promising platform for optical quantum memories but suffer from several decoherence mechanisms, leading to short memory lifetimes. While some of these decoherence…
Evaluation of DNA lesions and radicals generated by a 233 nm far-UVC LED in superficial ex vivo skin wounds
/forschung/publikationen/evaluation-of-dna-lesions-and-radicals-generated-by-a-233-nm-far-uvc-led-in-superficial-ex-vivo-skin-wounds
The application of a far-ultraviolet C (UVC) light emitting diode (LED) of 233 nm showed significant bactericidal efficacy at an applied dose between 20 and 80 mJ cm-2 as reported…
Modulated-Input Control and Linearization of a Multi-Port Millimeter-Wave PA by VNA-based Calibrated Wideband Measurements
/forschung/publikationen/modulated-input-control-and-linearization-of-a-multi-port-millimeter-wave-pa-by-vna-based-calibrated-wideband-measurements
An on-wafer multi-port measurement system based on a vector network analyzer (VNA) is exploited in order to perform the wideband characterization and linearization of a dual input Doherty power…
Broadband Hetero-Integration of InP Chiplets on SiGe BiCMOS for mm-Wave MMICs up to 325 GHz
/forschung/publikationen/broadband-hetero-integration-of-inp-chiplets-on-sige-bicmos-for-mm-wave-mmics-up-to-325-ghz
We present a broadband flip-chip approach for the hetero-integration of indium phosphide based chiplets on a BiCMOS carrier. To accommodate for a limited temperature budget, the process temperatures…
Calculation of optical modes in large emission area photonic crystal surface-emitting lasers
/forschung/publikationen/calculation-of-optical-modes-in-large-emission-area-photonic-crystal-surface-emitting-lasers
We discuss numerical challenges in constructing and resolving spectral problems for photonic crystal surface-emitting lasers with large (up to several mm2) emission area. We show that finite…
Designing rectangular surface Bragg gratings using machine learning models
/forschung/publikationen/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
/forschung/publikationen/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
/forschung/publikationen/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,…