Laser Spectroscopy Displays 12-nm Resolution
At
Swiss Federal Institute of Technology (ETH) in Zurich, scientists have employed laser spectroscopy and scanning probe microscopy to resolve two molecules 12 nm apart in a crystal host. The technique, which also detected dipole-dipole coupling in the molecules, promises to enable the controlled manipulation of the entanglement between such samples, opening the door to nanoscale quantum-state engineering and to a better understanding of light-harvesting complexes.
In the work, which appeared in the Oct. 11 issue of
Science, the researchers used a dye laser with a tunable wavelength near 578 nm to address single terrylene molecules in a 250-nm-thick para-terphenyl crystal at a temperature of 1.4 K. They generated a local electric field in the sample with a 3-µm-diameter, silver-coated micro-sphere on a fiber tip, which induced local inhomogeneous Stark shifts in the fluorescent response that enabled them to deduce the position of the molecules.
LATEST NEWS
- CLEO Heads to the East Coast
Apr 29, 2024
- Laser-Based Gas Analyzer Developed to Detect Air Pollution
Apr 29, 2024
- Qubits Could be Stored in Flash-Like Memory
Apr 29, 2024
- Exail Signs LLNL Contract, Partners with Eelume
Apr 26, 2024
- Menlo Moves U.S. HQ: Week in Brief: 4/26/2024
Apr 26, 2024
- Optofluidics Platform Keys Label-, Amplification-Free Rapid Diagnostic Tool
Apr 25, 2024
- DUV Lasers Made with Nonlinear Crystals Enhance Lithography Performance
Apr 25, 2024
- Teledyne e2v, Airy3D Collaborate on 3D Vision Solutions
Apr 24, 2024