Fluorescence Resonance Energy Transfer FRET
- Authors
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Zahraa Shaker Zabeel Hammoud
Albasrah university College of Science chemistry department -
Sabrine Mohammed Radi Fadel
University of Karbala, College of science chemistry department -
Mohammed falih hasan jiad
Wasit university College of Science department chemistry -
Salem Rokan khalaf Hassan
Kirkuk University collega of Science department chemistry -
Muntathar Safaa Hussein Ahmed
Wasit university College of Science department chemistry
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- Abstract
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FRET is analogous to near-field communication, in that the radius of interaction is much smaller than the wavelength of light emitted. In the near-field region, the excited chromophore emits a virtual photon that is instantly absorbed by a receiving chromophore. These virtual photons are undetectable, since their existence violates the conservation of energy and momentum, and hence FRET is known as a radiationless mechanism. Quantum electrodynamical calculations have been used to determine that radiationless (FRET) and radiative energy transfer are the short- and long-range asymptotes of a single unified mechanism.