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    Terahertz Imaging System on a Chip Offers Speed and Portability

    Article obtained from Photonics RSS Feed.

    An imaging system developed at Princeton University uses lasers small enough to fit on a microchip, and emits and detects electromagnetic radiation at terahertz (THz) frequencies. The new system, which is based on a semiconductor design, uses a dual-comb structure to efficiently measure the radiation that is reflected from the sample. Spectral signatures in the reflected radiation enable researchers to identify the sample’s molecular makeup.

    The device performs hyperspectral imaging with chip-scale frequency combs based on THz quantum cascade lasers. The dual combs are free-running and emit coherent THz radiation that covers a bandwidth of 220 GHz at 3.4 THz with ∼10  μW per line.

    The speed of the new…

    Jul, 26 2019 |

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