Imagine you filmed a time-lapse video of a garden over a year: you'd see details of flowers transitioning from day to night and season to season. Scientists would love to watch similar transitions on a molecular scale, but the intense light used to snap microscopic pictures of plants disrupts the processes biologists want to observe—especially at night. Writing in the journal Optica, physicist Duncan Ryan of Los Alamos National Laboratory (LANL) and his colleagues recently demonstrated a tool for imaging live plant tissues while exposing them to less light than they'd receive under the stars.
A technique called ghost imaging first demonstrated in 1995, involves splitting a light source to create two different-wavelength photons at precisely the same time and location. The photons are entangled—a quantum phenomenon that allows researchers to infer information about one particle in a pair by measuring the other. Thus, a sample can be probed at one wavelength and imaged at another.
For plants, that means researchers can image objects with visible-light photons and get knowledge about infrared photons that interact with water-rich molecules that are important to biological functions.
Read more on Scientific American.