scholarly journals Optically controlled resonance energy transfer: Mechanism and configuration for all-optical switching

2008 ◽  
Vol 128 (14) ◽  
pp. 144506 ◽  
Author(s):  
David S. Bradshaw ◽  
David L. Andrews
Keyword(s):  
Energy Transfer ◽  
Optical Switching ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
All Optical ◽  
All Optical Switching

scholarly journals Mechanistic principles and applications of resonance energy transfer

2008 ◽  
Vol 86 (9) ◽  
pp. 855-870 ◽  
Author(s):  
David L Andrews
Keyword(s):  
Energy Transfer ◽  
Optical Switching ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Synthetic Analogue ◽  
Primary Mechanism ◽  
Synthetic Materials ◽  
Förster Energy Transfer ◽  
All Optical ◽  
All Optical Switching

Resonance energy transfer is the primary mechanism for the migration of electronic excitation in the condensed phase. Well-known in the particular context of molecular photochemistry, it is a phenomenon whose much wider prevalence in both natural and synthetic materials has only slowly been appreciated, and for which the fundamental theory and understanding have witnessed major advances in recent years. With the growing to maturity of a robust theoretical foundation, the latest developments have led to a more complete and thorough identification of key principles. The present review first describes the context and general features of energy transfer, then focusing on its electrodynamic, optical, and photophysical characteristics. The particular role the mechanism plays in photosynthetic materials and synthetic analogue polymers is then discussed, followed by a summary of its primarily biological structure determination applications. Lastly, several possible methods are described, by the means of which all-optical switching might be effected through the control and application of resonance energy transfer in suitably fabricated nanostructures.Key words: FRET, Förster energy transfer, photophysics, fluorescence, laser.

scholarly journals Off-Resonance Control and All-Optical Switching: Expanded Dimensions in Nonlinear Optics

2019 ◽  
Vol 9 (20) ◽  
pp. 4252 ◽  
Author(s):  
David S. Bradshaw ◽  
Kayn A. Forbes ◽  
David L. Andrews
Keyword(s):  
Optical Switching ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Nonlinear Effects ◽  
Optical Nonlinearity ◽  
Moderate Intensity ◽  
Linear Absorption ◽  
Simultaneous Application ◽  
All Optical ◽  
All Optical Switching

The theory of non-resonant optical processes with intrinsic optical nonlinearity, such as harmonic generation, has been widely understood since the advent of the laser. In general, such effects involve multiphoton interactions that change the population of each input optical mode or modes. However, nonlinear effects can also arise through the input of an off-resonant laser beam that itself emerges unchanged. Many such effects have been largely overlooked. Using a quantum electrodynamical framework, this review provides detail on such optically nonlinear mechanisms that allow for a controlled increase or decrease in the intensity of linear absorption and fluorescence and in the efficiency of resonance energy transfer. The rate modifications responsible for these effects were achieved by the simultaneous application of an off-resonant beam with a moderate intensity, acting in a sense as an optical catalyst, conferring a new dimension of optical nonlinearity upon photoactive materials. It is shown that, in certain configurations, these mechanisms provide the basis for all-optical switching, i.e., the control of light-by-light, including an optical transistor scheme. The conclusion outlines other recently proposed all-optical switching systems.

scholarly journals Spectroscopic evidence of resonance energy transfer mechanism from PbS QDs to bulk silicon

2013 ◽  
Vol 54 ◽  
pp. 01017 ◽  
Author(s):  
P. Andreakou ◽  
M. Brossard ◽  
C. Li ◽  
P. G. Lagoudakis ◽  
M. Bernechea ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Bulk Silicon ◽  
Spectroscopic Evidence

scholarly journals Switching of resonance energy transfer mechanism in a dense array of II-VI quantum dots

2016 ◽  
Vol 741 ◽  
pp. 012155 ◽  
Author(s):  
K G Belyaev ◽  
T V Shubina ◽  
M A Semina ◽  
A V Rodina ◽  
A A Toropov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Transfer Mechanism ◽  
Energy Transfer Mechanism ◽  
Dense Array

scholarly journals Self-illumination of Carbon Dots by Bioluminescence Resonance Energy Transfer

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jisu Song ◽  
Jin Zhang
Keyword(s):  
Energy Transfer ◽  
Light Source ◽  
High Power ◽  
Carbon Dots ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Fluorescent Nanoparticles ◽  
Energy Transfer Mechanism ◽  
Bioluminescence Resonance Energy Transfer ◽  
Relationship Of

Abstract Carbon-dots (CDs), the emerging fluorescent nanoparticles, show special multicolor properties, chemical stability, and biocompatibility, and are considered as the new and advanced imaging probe in replacement of molecular fluorophores and semiconductor quantum dots. However, the requirement of external high power light source limits the application of fluorescent nanomaterials in bio-imaging. The present study aims to take advantage of bioluminescence resonance energy transfer mechanism (BRET) in creating self-illuminating C-dots. Renilla luciferase (Rluc) is chosen as the BRET donor molecule. Conjugation of Renilla luciferase and C-dots is necessary to keep their distance close for energy transfer. The optimal condition for achieving BRET is investigated by studying the effects of different factors on the performance of BRET, including the type of conjugation, concentration of carbon dots, and conjugation time. The linear relationship of BRET efficiency as a function of the amount of C-dots in the range of 0.20–0.80 mg/mL is observed. The self-illuminating carbon dots could be applied in bioimaging avoiding the tissue damage from the external high power light source.

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