Graphene Flagship partner, Emberion, will be launching a VIS-SWIR graphene photodetector at Laser World of Photonics, from 24 to 27 June in Munich, Germany. The linear array covers a wide spectral range, detecting wavelengths from the visible at 400nm into the shortwave infrared up to 1,800nm. Traditionally, it would require both silicon and InGaAs sensors to image across this wavelength range.
Emberion estimates that replacing a system using silicon and InGaAs sensors with its graphene photodetector would result in a 30% cost reduction.
Emberion's photodetectors combine graphene transistors with a light absorbing layer. Food inspection, plastic sorting in recycling, authentication of pharmaceutical products, agricultural field analysis, and non-invasive medical imaging are among the potential uses for this product.
The detector cannot compete with silicon CMOS for visible light detection, stated Dr. Vuokko Lantz, product manager at Emberion. But to extend into the shortwave infrared, the graphene photodetector becomes ‘a very interesting alternative’, Lantz said.
Lantz added: ‘Our detector can offer similar performance to InGaAs in the near and shortware infrared region, and we outperform InGaAs in the visible region.’
‘Graphene’s unique properties and its compatibility to combine with other nanomaterials allowed us to create this cost-effective array for spectrometers,’ commented Tapani Ryhänen, CEO of Emberion. ‘Providing broad spectrum capabilities, without the expense of traditional InGaAs sensors, the VIS-SWIR graphene photodetector provides a digital output using Emberion’s in-house designed read out circuits – without the need to translate analogue data with additional components.’
Emberion first showed a prototype VGA VIS-SWIR sensor at the 2018 SPIE Photonics West show in San Francisco, where Frank Koppens from the Institute of Photonic Sciences in Barcelona, Spain also presented several applications of graphene-CMOS integration.