A Tiny Photonic Nose Captures Odor Fingerprints - Physics

A bio-inspired detector the size of a US penny can identify the unique odor profiles of different gases, something that could help in detecting food freshness and product counterfeits and in designing new cosmetics.

A new device splits and recombines a laser beam as it passes through a gas to collect information about the chemicals in that gas. Breathe in the vapors wafting from your morning cup of coffee and y… [+5133 chars]

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