Dr Johannes Herrnsdorf

Senior Lecturer

Institute of Photonics

Personal statement

Dr. Johannes Herrnsdorf is a research associate at the Institute of Photonics. His main interests are the exploration of the physics of gallium nitride micro-LEDs and their development towards a wide range of applications including communications and imaging.

His research has equipped him with a broad background in semiconductor-based photonics, including solution processible organic and inorganic materials for colour conversion and lasers, and semiconductor devices for operation from the ultra-violet through to the near infrared wavelengths. He currently focusses on structured digital illumination, which is scalable from microscopic through to kilometre ranges, and on the few-photon operation of LED-enabled optical links. Dr Herrnsdorf has been awarded an EPSRC UKRI Innovation Fellowship to support his work on structured illumination and digital lighting at the few-photon level.

Scopus profile:
https://www.scopus.com/authid/detail.uri?authorId=35279751900

Google scholar profile:
https://scholar.google.com/citations?user=CjepYEMAAAAJ&hl=en

Expertise

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Prize And Awards

Highlights of 2017 in Semiconductor Science and Technolog: Recipient; 2017

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Publications

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Publications

Single pixel image classification using an ultrafast digital light projector: Kanwal Aisha, Johnstone Graeme E, Dehkhoda Fahimeh, Herrnsdorf Johannes H, Henderson Robert K, Dawson Martin D, Porte Xavier, Strain Michael J; Optics Express Vol 34, pp. 23803-23816 (2026); https://doi.org/10.1364/OE.598810
1.5 Gbps optical wireless communications using far-ultraviolet-C micro-light emitting diodes: Zimi Hichem, McKendry Jonathan, Babadi Sina, Osahon Isaac, Younus Othman, Ruschel Jan, Rass Jens, Einfeldt Sven, Haas Harald, Dawson Martin, Rajbhandari Sujan, Herrnsdorf Johannes; 15th International Symposium on Communication Systems, Networks and Digital Signal Processing 15th International Symposium on Communication Systems, Networks and Digital Signal Processing (2026)
High-speed switching of UV-C LEDs for communications and sensing applications: Hill Jordan, Gray Johnathan, Zimi Hichem, Xie Enyuan, McKendry Jonathan, Cheng Chen, Sagar Jaya, Herrnsdorf Johannes, Rajbhandari Sujan, Joshi Siddarth Koduru, Oi Daniel, Haas Harald, Henderson Robert, Dawson Martin; 4th International Conference on UV-LED Technologies & Applications (ICULTA 2026) (2026)
Ultraviolet micro-light-emitting diodes for satellite quantum key distribution: McKendry Jonathan, Gray Johnathan, Hill Jordan, Xie Enyuan, Willett Hobbs, Sagar Jaya, Joshi Siddarth Koduru, Rarity John, Herrnsdorf Johannes, Oi Daniel; 2025 IEEE Photonics Conference (IPC) IEEE Photonics Conference 2025 2025 IEEE Photonics Conference (IPC) (2025); https://doi.org/10.1109/IPC65510.2025.11282023
650 Mbps optical wireless communications using far-ultraviolet-C micro-light-emitting diode arrays: McKendry JJD, Zimi H, Rajbhandari S, Ruschel J, Rass J, Einfeldt S, Herrnsdorf J, Dawson MD; 2025 IEEE Photonics Conference (IPC) IEEE Photonics Conference 2025 2025 IEEE Photonics Conference (IPC), pp. 1-2 (2025); https://doi.org/10.1109/ipc65510.2025.11282262
Eye and skin-safe 150 Mbps Optical Wireless Communications over 1 m using UVC LEDs: McKendry Jonathan, Zimi Hichem, Shao Yingjie, Rajbhandari Sujan, Herrnsdorf Johannes, Dawson Martin; IEEE Photonics Technology Letters Vol 37, pp. 1451-1454 (2025); https://doi.org/10.1109/LPT.2025.3571619

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Research

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Professional Activities

High-Speed and Robust Optical Wireless Communication Systems: Digital Signal Processing and Application Scenarios: Contributor; 5/2026
Compact UV-C MicroLED Transmitter for Intersatellite Quantum Key Distribution: Contributor; 17/10/2025
Deep Ultra-Violet Micro-Light-Emitting Diodes for Compact Quantum Key Distribution Transceivers: Speaker; 31/7/2025
SCDT proposal development: Contributor; 13/2/2023
International Workshop on Nitride Semiconductors 2022: Participant; 10/11/2022
Recent developments in gallium nitride micro-light-emitting diode structured light sources: Contributor; 8/12/2020

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Projects

Fraunhofer UK Research Limited: Studentship Agreement | Vijayakumar, Akhil Dutt: Rajbhandari, Sujan (Principal Investigator) Herrnsdorf, Johannes (Co-investigator) Vijayakumar, Akhil Dutt (Research Co-investigator); 01-Jan-2026 - 01-Jan-2029
Advanced Network Connectivity using Harmonious Optical and Radio technologies (ANCHOR) HORIZON-MSCA-2024-DN-01: Rajbhandari, Sujan (Principal Investigator) Herrnsdorf, Johannes (Co-investigator) Li, David (Co-investigator) McKendry, Jonathan (Co-investigator); 01-Jan-2026 - 31-Jan-2029
Intersatellite Deep Ultraviolet Quantum Keys: Herrnsdorf, Johannes (Principal Investigator) Oi, Daniel (Co-investigator) Spesyvtseva, Susan (Co-investigator); 17-Jan-2025 - 31-Jan-2027
TITAN Extension. Integration of high-speed micro-LED transmitters with reconfigurable intelligent surfaces (micro-LED RIS): Herrnsdorf, Johannes (Principal Investigator) Dawson, Martin (Co-investigator); 01-Jan-2024 - 31-Jan-2026
plaTform drIving The ultimAte coNnectivity (TITAN) (Future Communications Systems Hub): Haas, Harald (Principal Investigator) Dawson, Martin (Co-investigator) Herrnsdorf, Johannes (Co-investigator) Tavakkolnia, Iman (Co-investigator); 01-Jan-2023 - 30-Jan-2026
Structured light projection for FLIM in scattering environments (QUANTIC): Strain, Michael (Principal Investigator) Dawson, Martin (Co-investigator) Herrnsdorf, Johannes (Co-investigator); 01-Jan-2023 - 30-Jan-2024