All Posts
Invited talk at the M&M 2024
- 01 Juli 2024
At the Microscopy & Microanalysis (M&M) conference in Cleveland Ohio from July 28 to August 1, Mikel Gómez Ruiz, PhD student at PDI, will represent the ZALKAL application laboratory with an invited talk. This talk is entitled “Spatial, Spectral and Time Resolution: Tackling the Challenges of Multidimensional Luminescence Data Analysis with LumiSpy ”.
Factory acceptance test for the ZALKAL microscope successful
- 17 Mai 2024
The application laboratory time-resolved cathodoluminescence spectroscopy is starting to take shape. Together with a representative from the CL manufacturer Delmic, PDI Senior Scientist Jonas Lähnemann and PostDoc Kagiso Loeto recently went to the Thermo Fisher factory in Brno for a successful customer-witnessed acceptance test of the Verios scanning electron microscope that will be at the core of the extraordinary new system. Installation at PDI will start before the end of May.
Introduction to HyperSpy at the eBEAM summer school in September 2024
- 01 April 2024
At the Summer School on Nano-optics with Free Electrons (eBEAM 2024) Jonas Lähnemann is invited to a talk in data analysis using python combined with subsequent introductory tutorials to HyperSpy/LumiSpy held in small groups. The summer school will take place at the Paul Langevin Center of the CNRS in Aussois in the French Alpes from September 1-13, 2024. Appl between March 4 and Mai 1 to join.
Spring/summer conferences 2024
- 01 März 2024
PhD student Domenik Spallek will present a poster on “Probing Li-diffusion into Ga2O3-polymorphs by depth-resolved cathodoluminescence spectroscopy” at the International Workshop on Gallium Oxide and Related Materials (IWGO) in Berlin (May 26 – 31, 2024).
ZALKAL at the DPG Spring Meeting
- 15 Februar 2024
At the Frühjahrstagung of the Condensed Matter Section (Sektion Kondensierte Materie) of the German Physical Society (DPG) on March 17-22, 2024, PhD and master students of the ZALKAL project will be presenting three talks and one poster:
Python-Package HyperSpy 2.0 released
- 20 Dezember 2023
Version 2.0 of the open-source software HyperSpy, co-developed by the PDI, has been published on conda-forge and PyPI. HyperSpy is a Python package for analyzing hyperspectral (multidimensional) data, which we use to evaluate our cathodoluminescence measurements. With the new version, many photoluminescence data formats and the native format of the Hamamatsu streak camera, which is being acquired for ZALKAL, can now also be read directly using the RosettaSciIO extension.
Invited talk at the ICNS-14
- 10 Oktober 2023
At the 14th International Conference on Nitride Semiconductors (ICNS) in Fukuoka, Japan, in November 2023 Jonas Lähnemann from PDI is invited to hold a talk on “Revisiting the determination of the carrier diffusion length in GaN from cathodoluminescence spectroscopy”.
Participation in the Maus-Türöffner Tag
- 03 Oktober 2023
On October 3, the team from the analytical scanning electron microscopy laboratory at the PDI took part in the Maus-Türöffner Tag of the TV program “Sendung mit der Maus”. Among other things, the children could explore the “smallest mouse”, for which the PDI cleanroom team engraved the Maus-Logo into the structure of a light-emitting diode. A total of 40 registered children between the ages of 5 and 13 plus around 30 accompanying adults were able to discover the activities of the laboratory in an age-appropriate way.
Our article on AlN luminescence was featured on the front page of APL Materials
- 01 September 2023
The article “Excitonic and deep-level emission from N- and Al-polar homoepitaxial AlN grown by molecular beam epitaxy”[1] published by the PDI in collaboration with the research group of Prof. Debdeep Jena at Cornell University was chosen for the August edition of the journal APL Materials. This work is based on measurements taken during the DAAD Rise Pro stay of Len van Deurzen at the PDI in fall 2023 and has provided important impulses for the specification of ZALKAL’s optics and detectors in the UV spectral range.
HyperSpy/LumiSpy Tutorials 2023
- 01 März 2023
In 2023, Jonas Lähnemann is invited to hold three Tutorials introducing the python package LumiSpy at conferences and workshops:
CLEBIC in Grenoble in March co-organized
- 01 Januar 2023
Jonas Lähnemann ist part of the organizing committee for the 2nd Workshop on Cathodoluminescence and Electron Beam Induced Current of Semiconductor Nanostructures (CLEBIC) held on March 22-24, 2023, at Institut Néel in Grenoble. This workshop is a sequel to the Topical Workshop Cathodoluminescence of Semiconductor Nanostructures organized at PDI in 2018. Due to the corona pandemic the workshop originally planned for March 2020 in Grenoble had to be postponed.
