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In an advance for smartphone spectroscopy, researchers at ETH Zurich have developed a chip about 2 cm2 in size that can be used with a smartphone to analyze infrared (IR) light in the same way a conventional spectrometer would.
The researchers demonstrated an integrated single-waveguide Fourier transform spectrometer with an operational bandwidth of 500 nm in the near- and short-IR wavelengths. The prototype device, with a footprint of less than 10 mm2, exploits the electro-optic properties of thin-film lithium niobate in order to retrieve a complete spatial interferogram.
Approximately 2 cm in length, this chip makes it possible to precisely analyze the infrared spectrum. Courtesy of ETH Zurich/Pascal A. Halder….READ MORE