ELECTROMAGNETIC INDUCED TRANSPARENCY

ELECTROMAGNETIC INDUCED TRANSPARENCY FIRST INTRODUCED BY PROF JACOB KHARIN AND STUDENTS OF RUSSIAN UNIVERSITY.

EIT IS A QUANTUM INTERFERENCE EFFECT WHICH ACTS TO REDUCE THE USUAL ABSORPTION OF LIGHT EXPERIENCED WHEN ITS FREQUENCY IS TUNED THE RESONANCE FREQUENCY OF THE SAMPLE THROUGH WHICH THE LIGHT IS PROPAGATING. THE TRANSPARENCY IS CREATED BY A SECOND LIGHT SOURCE TUNED TO ANOTHER RESONANCE OF THE SAMPLE. THERE ARE THREE WAYS IN WHICH THESE TWO LIGHT SOURCE CAN BE TUNED TO THE RESONANCE OF A SIMPLE ATOMIC SYSTEM IN A CASCADE CONFIGURATION.

SO EIT IS A COHERENT OPTICAL NONLINEARITY WHICH RENDERS A MEDIUM TRANSPARENT OVER A NARROW SPECTRAL RANGE WITH AN ABSORPTION LINE . EXTREME DISPERSION IS ALSO CREATED WITH THIS TRANSFERENCE WINDOWS WHICH LEADS TO SLOW LIGHT. IN THIS HIGH COHERENT LIGHT SOURCE (LASER) WHICH ARE TUNED TO INTERACT WITH THREE QUANTUM STATES OF A MATERIAL