Nanowerk November 7, 2023 Ramp-reversal memory has recently been discovered in several insulator-to-metal transition materials where a non-volatile resistance change can be set by repeatedly driving the material partway through the transition. An international team of researchers (USA – Purdue University, University of Colorado, UCSD, France) has successfully developed a single-photon light source consisting of doped ytterbium ions (Yb3+) in an amorphous silica optical fiber at room temperature. They used optical microscopy to track the location and internal structure of accumulated memory as a thin film of VO2 was temperature cycled through multiple training subloops. The measurements revealed that the […]
Tag Archives: Single photon light source
Optical-fiber based single-photon light source at room temperature for next-generation quantum processing
Science Daily November 2, 2023 Rare-earth (RE) atoms in solid-state materials are attractive components for photonic quantum information systems because of their coherence properties even in high-temperature environments. Researchers in Japan performed the single-site optical spectroscopy and optical addressing of a single RE atom in an amorphous silica optical fiber at room temperature. The single-site optical spectroscopy of the tapered RE-doped fiber showed nonresonant emission lines similar to those seen in the case of an unstructured fiber and the autocorrelation function of photons emitted from the fiber showed the antibunching effect due to the spatial isolation given by the tapered […]