Home Page of Biswajit Ray

Email: brphy at caluniv dot ac dot in | brphy [at] gmail.com
Phone: +91-33-2350 8386 ext 416

Education: Ph.D. (Physics), 1998, Calcutta University


Lecturer, N. D. College (Howrah)    2000-2002
Lecturer, Calcutta University          2002-2004
Sr. Lecturer, Calcutta University     2004-2009
Reader, Calcutta University            2009-2012
  Associate Professor, Calcutta University [2012 onwards]

1. Indian Physics Association (Life member)
2. Laser and Spectroscopy Society of India (Life member)

Atom molecule & Laser; Electronics and Instrumentation; Quantum
Electronics; Laser Physics

Research Area
Laser Physics and Quantum Optics

Research guidance:
Number of researchers awarded Ph.D degrees : 05
Number of researchers pursuing Ph.D : 02

Scientific visits abroad of short durations:

  1. Bulgarian Academy of Science, Institute of Electronic, Sofia, Bulgaria
    Working in optical magnetometer

  2. University of Konstanz, Germany,
    Working in the laser cooling and trapping experiment of Cr atoms in magneto- optical trap

Research Projects:
  1. High Resolution Diode Laser Spectroscopy of Atmospheric Molecules
    Funded by DST, New Delhi, Year: 2007-2010, Amount: Rs. 26 lakhs

  2. Investigation on cold atoms and molecules, UGC-UPE project, Year: 2007-2012,
    Amount: Rs. 50 lakhs
Research Publications: 52
Articles in Books:       03

Some Selected Papers:

(1) Investigation of quantum coherence effects in a multilevel atom induced by three laser fields; S. Dey et al, Eur. Phy. J. D 69, 43 (1-11) (2015)

(2) A study of the repumping laser and external magnetic field effect on coherent absorption resonance in alkali vapour; S. Dey, et al, Chem. Phys. Lett. 627, 107-115 (2015)

(3) Investigation of high-contrast velocity selective optical pumping resonance at the cycling transition of Cs using fluorescence technique; S. Dey et al; Opt. Comm. 356, 378-388 (2015)

(4) EIT line shape in an open and partially closed multilevel V-type system; S. Dey et. al.; Optik 126, 2711-2717 (2015)

(5) Nonlinear coherent absorption resonance in optically thick medium; S. Dey et al; Adv. Sc. Lett. 21, 2661-2664 (2015)

(6) Dissociation of OCS by high energy highly charged ion impact; M. R. Jana et al;
Euro. Phys. J. D., Eur. Phys. J. D (2014) 68: 250

(7) Observation and theoretical simulation of electromagnetically induced transparency
and enhanced velocity selective optical pumping in cesium vapour in a micrometric thickness optical cell; A Krasteva et al; J. Phys. B: At. Mol. Opt. Phys. 47 (2014) 175004

(8) Temperature and magnetic field effects on the coherent and saturating resonances in ?- and V-type systems for the 85Rb-D2 transition; S. Mitra et al; J. Phys. B: At. Mol. Opt. Phys. 46 (2013) 075002

(9) Spectroscopic study of self and buffer gas broadened CO2 overtone transitions at 780 nm by NIR diode laser spectrometer; P. Poddar et al; Euro. Phys. J. D. 66 (2012) 228

(10) Standing wave pump field induced coherent non-linear resonances in rubidium vapor; S. Mitra et al; Chem. Phys. Lett. 513 (2011) 173

(11) Nonlinear resonances caused by coherent, optical pumping and saturating effects in the presence of three laser fields for the 85Rb-D2 line; M. M. Hossain et al; J. Phys. B: At. Mol. Opt. Phys., 44 (2011) 115501

(12) Double EIT and enhanced EIT signal in a combination of ?- and V-type system of Rb-D2 transition; M. M. Hossain et al; Appl. Phys. B, 103 (2011) 117

(13) A comparative study of the effects of different buffer gases on the lineshape of water vapour rovibronic transition; P. Poddar et al; Vib. Spectrosc. 56 (2011) 96

(14) On line shape of electromagnetically induced transparency in a multilevel system; S. Mitra et al ; Optics Communications 283 (2010) 1500-1509

(15) Dissociation of carbonyl sulfide by 150 keV Ar+ ion impact; M. R. Jana et al; Journal of Phys. B: At. Mol. Opt. Phys. 43 (2010) 215207

(16) Diode laser spectroscopy of He, N2 and air broadened water vapour transitions belonging to the (2?1+?2+?3) overtone band; P. Poddar et al; Molecular Physics 108 (2010) 1957-1964

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