A new infrared photodiode has been developed, which could increase the efficiency of technologies that rely on the detection of infrared light. Developed by researchers, this new sensor achieves a 35% increase in responsivity at a wavelength of 1.55 µm, which is widely used in telecommunications. Its design enables it to be manufactured with existing production techniques, simplifying integration into existing systems. Infrared sensors play an important role in diverse applications, including self-driving vehicles, virtual reality, and remote control.

Advances in Photodiode Technology

According to one study Published in the journal Light: Science and Applications, the photodiode is made using germanium instead of the commonly used indium, gallium and arsenide. Germanium offers a cost-effective and compatible option with semiconductor manufacturing but has historically performed poorly in capturing infrared light.

The team behind the innovation reportedly overcame this limitation by combining techniques that eliminate optical losses through surface nanostructures and reduce electrical losses using two separate methods.

Exceptional performance in responsibility

The device is reported to absorb almost all infrared light incident on itself. Tests show that its performance outperforms not only existing germanium photodiodes, but also commercially available indium gallium arsenide alternatives. The high responsivity and efficiency at different wavelengths make it a promising development for a number of technologies, especially in areas where infrared sensing is mandatory.

Potential Applications and Effects

Professor Hale Sawan, who led the research told Phys.org that the work represents the culmination of an eight-year effort. Hanchen Liu, a doctoral researcher involved in the project, added that existing manufacturing facilities can easily produce the photodiode, ensuring its practicality. The innovation is expected to significantly impact existing systems while paving the way for new applications that require sensitivity.

The timing of this development coincides with the increasing reliance on infrared sensing across a number of industries, reflecting the technology’s essential role in modern life. The researchers are optimistic about the broader implications of their work.