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"An interesting twist to the technique is that no additional materials are needed in the process. All you need is tellurite glass and a femtosecond laser to make an active photoconductive material."

Previously reported light sensors typically do not have photoconductive gain, and therefore require an amplifier device to boost the electrical signal; this increases both power consumption and the size of the overall device6.

The intrinsic photoconductive gain of Polat and colleagues’ devices eliminates the need for an amplifier, solving the above problems and making the sensors particularly suitable for real-life applications.