Journal ArticleDOI
Splitting of electromagnetically induced transparency under strong-probe conditions due to Doppler averaging
Kanhaiya Pandey,Vasant Natarajan +1 more
TLDR
In this article, the authors studied the phenomenon of electromagnetically induced transparency (EIT) in room-temperature Rb vapour under conditions of a strong probe laser.Abstract:
We study the phenomenon of electromagnetically induced transparency (EIT) in room-temperature Rb vapour under conditions of a strong probe laser. The atoms form a ladder system with the lower transition coupled by the probe laser and the upper transition coupled by the control laser. Density-matrix analysis of the system shows that, for zero-velocity atoms, the strong probe beam causes a reduction in absorption and broadening of the profile. But the lineshape after thermal averaging shows a splitting of the EIT resonance and enhanced absorption near line centre. The experimental observations in $^{85}Rb$ agree qualitatively with the predicted lineshapes.read more
Citations
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Journal ArticleDOI
High-accuracy wavemeter based on a stabilized diode laser
TL;DR: In this article, a high-accuracy wavelength meter for tunable laser using a scanning Michelson interferometer and a reference laser of known wavelength was built using a frequency-stabilized diode laser.
Journal ArticleDOI
Coherent control of magneto-optic rotation
TL;DR: In this article, the rotation of the plane of polarization of a laser beam passing through room-temperature Rb vapour was studied. Butler et al. showed that the rotation occurs because the medium behaves differently for the two orthogonallypolarized components, displaying what is known as circular birefringence or linear dichroism.
Journal ArticleDOI
Electromagnetic induced transparency in the Doppler broadened cascade transition with multiple excited levels
Vineet Bharti,Ajay D. Wasan +1 more
TL;DR: In this paper, a theoretical model using the density matrix approach has been presented to show the influence of multiple excited states on electromagnetically induced transparency (EIT) in a cascade-type Doppler broadened medium.
Journal ArticleDOI
Diagrammatic analysis of multiphoton processes in a ladder-type three-level atomic system
Heung-Ryoul Noh,Han Seb Moon +1 more
TL;DR: In this paper, a diagrammatic method for complete characterization of multiphoton processes in three-level atomic systems is presented, where the interaction routes of the coupling and probe photons for a ladder-type, threelevel, non-cycling (or cycling) atomic system are considered.
Journal ArticleDOI
Role of different types of subsystems in a doubly driven Λ system in 87 Rb
TL;DR: In this article, Chanu et al. presented a detailed theoretical study of the different possible subsystems created by the doubly driven ε-Lambda system and explored the possibility of tuning the strength of individual subsystems by changing the polarization of the control lasers.
References
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Proceedings Article
Nonlinear-optical processes using electromagnetically induced transparency
TL;DR: It is shown that by applying a strong-coupling field between a metastable state and the upper state of an allowed transition to ground one may obtain a resonantly enhanced third-order susceptibility while at the same time inducing transparency of the media.
Journal ArticleDOI
Electromagnetically induced transparency in ladder-type inhomogeneously broadened media: Theory and experiment
TL;DR: A theory of electromagnetically induced transparency in a three-level, ladder-type Doppler-broadened medium is developed, paying special attention to the case where the coupling and probe beams are counterpropagating and have similar frequencies, so as to reduce the total Dopplers width of the two-photon process.
Journal ArticleDOI
Coherent Optical Detection of Highly Excited Rydberg States Using Electromagnetically Induced Transparency
TL;DR: It is shown that the EIT spectra allow direct optical detection of electric field transients in the gas phase, and measurements of the fine structure splitting of the nd series up to n=96 are extended.
Journal ArticleDOI
Inhibition of spontaneous emission noise in lasers without inversion.
TL;DR: A very large degree of quenching of spontaneous emission noise is demonstrated in different laser systems that work on mechanisms other than the population inversion between the bare states of the atom.
Journal ArticleDOI
Modification of resonance Raman scattering in very intense laser fields
TL;DR: In this paper, the same authors applied the general method developed in a previous paper (see ibid., vol.10, p.345 (1977)) to the problem of resonance Raman scattering in very intense laser fields.