{"id":4584,"date":"2011-09-24T10:34:20","date_gmt":"2011-09-24T14:34:20","guid":{"rendered":"https:\/\/engineering.jhu.edu\/materials\/?p=4584"},"modified":"2011-09-24T10:34:20","modified_gmt":"2011-09-24T14:34:20","slug":"blinking-in-quantum-dots","status":"publish","type":"news","link":"https:\/\/engineering.jhu.edu\/materials\/news\/blinking-in-quantum-dots\/","title":{"rendered":"Blinking in Quantum Dots: the Origin of the Grey State and Power Law Statistics"},"content":{"rendered":"
\"Energy-band<\/a>

Energy-band diagrams illustrating the dynamics
of electron-hole pairs in blinking quantum dots.<\/p><\/div>\n

Under constant illumination, a single quantum dot (QD) is blinking (intermittent fluorescence). This would greatly limit the application of using a single quantum dot in particle tracking, as well as in lasing technology.<\/p>\n

QD blinking is characterized by switching between an \u201con\u201d state and an \u201coff\u201d state, and a power-law distribution of on and off times with exponents from 1.0 to 2.0. The origin of blinking behavior in QDs, however, has remained a mystery.<\/p>\n

 <\/p>\n

In this research, we developed a theoretical model in which by studying the interaction between photons and single quantum dot (QD), we were able to explain almost all the characteristics of blinking, including under what condition non-blinking occurs, what results in grey state, as well as the power-law behavior.<\/p>\n

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Related<\/h6>\n