Researchers in Japan developed a microscopy technique called the "Atom Camera" that maps laser light intensity and polarization at the nanometer scale.
This development allows scientists to visualize light distributions that are typically invisible to conventional optics. By overcoming the diffraction limit, the team can now observe the precise behavior of light at a scale previously unreachable with standard tools.
The project was led by Assistant Professor Takafumi Tomita and Professor Kenji Ohmori at the Institute for Molecular Science, National Institutes of Natural Sciences [1]. The team utilized a single ultracold rubidium atom [3] to act as the primary sensor for the camera.
To maintain the stability of the sensor, the atom is trapped in an optical tweezer and cooled to a temperature near absolute zero [2]. This extreme environment allows the atom to precisely map the polarization and intensity of laser light as it moves through the system.
The researchers said the Atom Camera achieves a spatial resolution below 100 nanometers [3]. This precision enables the visualization of light distributions at a scale far smaller than the wavelength of the light being measured.
The technique focuses on mapping how laser light is distributed across a tiny area, a process essential for advancing nanotechnology and quantum optics. The researchers used the rubidium atom to probe the electromagnetic field of the laser with high accuracy [1].
“The Atom Camera achieves a spatial resolution below 100 nanometers.”
The ability to map light at a sub-100 nanometer resolution represents a significant leap in nanophotonics. By bypassing the diffraction limit of traditional lenses, this technology provides a new method for characterizing light-matter interactions, which is critical for the development of next-generation quantum computers and ultra-precise optical sensors.
