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An ultra-sensitive thermal radiation detector

profilePhoto   Gisela Schach
Linksium Contact Gisela Schach +33 (0)6 33 63 44 99


  • Universal Broadband Detector
  • Direct thermal measurement of laser power
  • Low power (P < 1 microW)
  • No calibration required

Key words

  • Thermal detector
  • High sensitivity
  • Laser power
  • Infra-red radiation

Intellectual Property

  • 1 patent

Partnerships & Rewards

  • Fonds FEDER - Région Auvergne Rhône Alpes


  • NEEL


  • CNRS
  • UGA

Linksium Continuum

  • Maturation
  • Incubation


In various fields of optics, there is a need for universal thermal detectors with very high sensitivity. For example, there is no broadband thermal detector that can measure laser power below microwatt.


The coupling of a thin kapton membrane with thin film semiconductor materials, with a very high factor of merit (ZT ~ 1) has made it possible to obtain, thanks to microfabrication technologies, a unique device that can detect radiation of only a few nanowatts. Thus, il can generate electrical powers of up to 100 microwatts with an efficiency of 5%.


  • High sensitivity laser power detection (1nW < P < 100mW) with a flat spectrum from visible to far infrared (unique calibration for all types of lasers).
  • Possibility of detecting energy pulses of only a few nanojoules without cooling of the thermal and electronic environment.
  • Ultimate detection of infra-red radiation with the possibility of thermoelectric generation (from 10 to 100 µW of useful power available per module).

State of progress

  • Laboratory proof of concept, TRL 3 (protected by a patent)
  • Versatility and low production cost
  • Prototype in significant environment in Summer 2022


  • Fine and precise measurement of laser power
  • Precise beam position detection
  • Infra-red radiation detector
  • Microgenerator (100 mV; 1mA)

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