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

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
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
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
235 nm and 255 nm light-emitting diode based Gbps optical wireless communications up to 30 meters: Zimi Hichem, Babadi Sina, Majlesein Behnaz, Osahon Isaac N O, McKendry Jonathan J D, Rajbhandari Sujan, Herrnsdorf Johannes, Haas Harald, Dawson Martin D; Optics Express Vol 33, pp. 51383-51391 (2025); https://doi.org/10.1364/OE.580372
650 Mbps optical wireless communications using ultraviolet-C micro-light-emitting diodes: McKendry Jonathan, Zimi Hichem, Rajbhandari Sujan, Ruschel Jan, Rass Jens, Einfeldt Sven, Herrnsdorf Johannes, Dawson Martin; IEEE Photonics Conference 2025 (2025)
Ultralow photon flux OWC links using UV‐C single‐photon detection: Liu Feng, Farmer James, Faulkner Grahame, McKendry Jonathan J D, Xie Enyuan, Zheng Qianfang, Wang Zhaoming, Wang Jianming, Hill Jordan, Herrnsdorf Johannes, Dawson Martin D, O'Brien Dominic; Laser and Photonics Reviews Vol 19 (2025); https://doi.org/10.1002/lpor.202401804

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Research

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Professional Activities

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
Integration of an LED/SPAD Optical Wireless Transceiver with CubeSat On-board Systems: Contributor; 28/9/2020
Combined Time of Flight and Photometric Stereo Imaging for Surface Reconstruction: Contributor; 28/9/2020
Micro-LEDs for technological convergence between displays, optical communications, and sensing and imaging systems: Contributor; 12/8/2020

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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
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-2025
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
MicroLED Communications for High Altitude Pseudo Satellites: Herrnsdorf, Johannes (Principal Investigator); 01-Jan-2023 - 28-Jan-2025
HYDRI - HYDrogen sensoR for Industry: Herrnsdorf, Johannes (Principal Investigator) Li, David (Co-investigator); 01-Jan-2022 - 31-Jan-2025