Related Experiment Video
Updated: Jun 24, 2025

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
Published on: June 2, 2017
Resonant energy transfer among naturally available bio materials for white light emission
Josmi John1, Ajai A Pillai1, Jancy John1
1Center for Functional Materials, Department of Physics, Christian College Chengannur, University of Kerala, Alappuzha, India.
Abstract:
In this work we have studied the fluorescence of natural dyes and generated nearly pure white light with chromaticity intensity (CIE) coordinate (0.35,0.35). The colour rendering index (CRI) and colour temperature corresponding to the CIE coordinate are calculated and these dyes are ideal for cool white light emission. It was observed that a broadband and simultaneous emission involving anthocyanin and polyphenol ellergic acid from jamun, curcumin and chlorophyll from spinach leaves played a vital role in obtaining a CIE index close to that of pure white light. The white light emission is due to the Förster resonance energy transfer (FRET) from curcumin to anthocyanin and ellergic acid to curcumin. Efficiency of FRET is calculated and different possibilities studied. For the polyphenol ellergic acid, curcumin FRET pair the spectral overlap integral and the efficiency are 3.29 × 10-24 m2, 99.97% and for the curcumin, anthocyanin pair, they are 4.03 × 10-24 m2, 76%, respectively.
More Related Videos
07:39Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
08:31Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
Published on: September 16, 2014
Related Concept Videos
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Raman Spectroscopy: Overview
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
Interaction of EM Radiation with Matter: Spectroscopy
Light as Energy
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
Emission Spectra