Researchers have succeeded in combining two major research fields in photonics by creating a nano-object with unique optical qualities. Since the object is a thousand times thinner than the human hair, yet very powerful, the breakthrough has great potential in the development of efficient and compact nonlinear optical devices.
Researchers at Chalmers University of Technology, in Sweden, have for the first time succeeded in combining two major research fields in photonics by creating a nanoobject with unique optical qualities. Since the object is a thousand times thinner than the human hair, yet very powerful, the breakthrough has great potential in the development of efficient and compact nonlinear optical devices.
"We have fabricated for the first time a nanodisk of specifically stacked molybdenum disulfide that preserves the broken inverse symmetry in its volume, and therefore maintains optical nonlinearity. Such a nanodisk can maintain the nonlinear optical properties of each single layer. This means that the material's effects are both maintained and enhanced," says Georgii Zograf.
"It really is a milestone, particularly due to the disk's extremely small size. Second harmonic generation and other non-linearities are used in lasers every day, but the platforms that utilise them are typically on the centimetre scale. In contrast, the scale of our object is about 50 nanometers, so that's about a 100,000 times thinner structure," says research leader Professor Timur Shegai.
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