COSMA - Coherent Optics Sensors for Medical Application is an European Marie Curie Project running from 2012 to March 2016, with the participation of 10 teams from Armenia, Bulgaria, India, Israel, Italy, Poland, Russia, UK, USA. The main objective was to focus theoretical and experimental research on biomagnetism phenomena, with the specific aim to develop all-optical sensors dedicated to their detection and suitable for applications in clinical diagnostics. The paper presents some of the most recent results obtained during the exchange visits of the involved scientists, after an introduction about the phenomenon which is the pillar of this kind of research and of many other new fields in laser spectroscopy, atomic physics, and quantum optics: the dark resonance. © 2017 SPIE.

BISWAJIT RAY

Physics

E MARIOTTI

G BEVILACQUA

V BIANCALANA

R CECCHI

Y DANCHEVA

A KHANBEKYAN

C MARINELLI

L MOI

L STIACCINI

S CARTALEVA

Fulltext

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Forty years after the first dark resonance experiment: an overview of the COSMA project results

Proceedings of SPIE - The International Society for Optical Engineering

Observation of electromagnetically induced transparency (EIT) and enhanced velocity selective optical pumping (VSOP) signals in a micrometric cell with cesium is reported. The line shape and non-linear features observed in the case of fluorescence in the direction parallel to the cell windows and the transmission spectra observed along the propagation direction of the probe beam show considerable differences in the spectral profile. A theoretical model based on five level optical Bloch equations is used to simulate the spectra. The Doppler convolution includes all possible orientations of atomic velocities with respect to the laser beam direction. Atoms moving nearly parallel to the windows and perpendicular to the collinear pump and probe beams have much lower Doppler shift and hence produce considerable narrowing of the Doppler background in the fluorescence spectra. The coherence decay rate is also low for such atoms as they do not meet with the cell walls. The simulated curves reproduce the observed sharp EIT peaks and enhanced broad VSOP signals for the closed probe transition in the fluorescence and absorption spectra. The observed effect of detuning of the pump frequency on the non-linear features is also reproduced by the simulation. © 2014 IOP Publishing Ltd.

Journal of Physics B: Atomic, Molecular and Optical Physics

Observation and theoretical simulation of electromagnetically induced transparency and enhanced velocity selective optical pumping in cesium vapour in a micrometric thickness optical cell

The European Physical Journal D

Buffer gas-assisted four-wave mixing resonances in alkali vapor excited by a single cw laser

Optics Express

Vector light shift averaging in paraffin-coated alkali vapor cells

Physical Review A

Atomic orientation driven by broadly-frequency-modulated radiation: Theory and experiment

Scientific Reports

Optical Magnetic Induction Tomography of the Heart

Forty years after the first dark resonance experiment: An overview of the COSMA project results

Journal	Data powered by TypesetProceedings of SPIE - The International Society for Optical Engineering
Publisher	Data powered by TypesetSPIE
ISSN	0277-786X
Open Access	Yes