Researchers at NIST have developed a new method for creating quantum dots using electron beam lithography and etching, which allows for more precise control over the size, shape, and positioning of these semiconductor nanocrystals. This method, developed by NIST postdoctoral researcher Varun Verma, offers the potential to create identical quantum dots, which could be used to generate entangled photons for quantum communications.
The new quantum dots were tested at NIST and found to emit single particles of light (photons) on demand, a crucial trait for quantum information systems. The researchers plan to construct reflective cavities around individual etched dots to guide their light emissions more efficiently. This could lead to more reliable and efficient single photon sources for quantum technologies.
Keywords: Photons, Quantum Dots, Lithography, Etching, Semiconductors
