A new infrared photodiode has been developed that could improve the efficiency of technologies that rely on infrared light detection. Developed by researchers, this new sensor achieves a 35 percent increase in response capacity at a wavelength of 1.55 µm, widely used in telecommunications. Its design allows it to be manufactured with existing production techniques, simplifying integration into current systems. Infrared sensors play an essential role in various applications, including autonomous vehicles, digital reality, and remote controls.
Advances in photodiode technology
According to a study Published in the journal Gentle: Science & Functions, the photodiode was created using germanium instead of the commonly used indium, gallium and arsenide. Germanium offers a cost-effective and compatible option for semiconductor manufacturing, but has historically underperformed 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 through two different approaches.
Exceptional responsive performance
The device is reported to capture almost all of the infrared light that hits it. Testing indicates that its performance outperforms not only current germanium photodiodes, but also commercially available indium gallium arsenide alternatives. The high responsiveness and efficiency at various wavelengths make it a promising development for various technologies, particularly in fields where infrared detection is integral.
Potential applications and impact
Hele Savin, professor leading the research, said 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 could easily produce the photodiode, ensuring its practicality. The innovation is expected to have a significant impact on existing systems while paving the way for new applications that require greater sensitivity.
The timing of this advancement aligns with the growing reliance on infrared sensing across multiple industries, reflecting the essential role of this technology in modern life. The researchers remain optimistic about the broader implications of their work.
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