Dr Tuomas Haggren

Position	Research Fellow
Department	Electronic Materials Engineering
Research group	Semiconductor optoelectronics and nanotechnology group
Office phone	(02) 612 54283
Mobile phone	0482 048 565
Email
Office	Physics New 3 13

Flexible, cost-effective III-V semiconductor-perovskite tandem solar cells

This project aims to develop high efficiency, cost-effective III-V semiconductor-perovskite tandem solar cells which are flexible and lightweight, while achieving excellent device stability.

Professor Hoe Tan, Dr Tuomas Haggren, Professor Chennupati Jagadish

Wearable III-V nanofilm photodetectors and sensors

Semiconductor nanofilms are just some tens of nanometres thick single-crystalline structures with lateral dimensions in cm-scale. The ultra-low thickness gives these films interesting properties differing from bulk materials, and enables interesting novel device concepts in photodetection and gas sensing.

Dr Tuomas Haggren, Professor Hoe Tan, Professor Chennupati Jagadish

Electrically Injected Bottom-Up Micro-Cavity Lasers

This project aims to demonstrate electrically injected InP/InAsP micro-ring nanolasers grown by selective area epitaxy. By combining atomically smooth, low-loss cavities with scalable on-chip integration, it addresses a key challenge in nanophotonics. The resulting light sources promise transformative applications in telecommunications, sensing, and next-generation photonic integrated circuits.

Dr Wei Wen Wong, Dr Tuomas Haggren, Professor Hoe Tan, Professor Chennupati Jagadish

Electrically injected metasurface lasers

Metasurfaces have emerged as a cornerstone for next-generation optics and optoelectronics. This project aims to create metasurface lasers from III-V semiconductor thin-films, that are additionally pumped electrically.

Dr Tuomas Haggren, Professor Hoe Tan, Professor Chennupati Jagadish