Latest Updates

Aprl 2018:   Highlight in Nature India.    ***    Aprl 2018:  Light Matter Lab congratulates Mayuri Kawale, Randhir Kumar and Umang Jain for successfully defending their Masters Thesis .    ***    Aprl 2018:  Light Matter Lab congratulates Souvik Sil for being awarded CSIR Senior Research Fellowship.    ***    Aprl 2018:  New paper 'Two-point active microrheology in a viscous medium exploiting a motional resonance excited in dual-trap optical tweezers' has been published in Phys. Rev. E.    ***    Nov 2017:  Our paper 'Dual-mode optical fiber-based tweezers for robust trapping and manipulation of absorbing particles in air' has become The paper of the week for the duration 21st Nov - 27th Nov, 2017.    ***    Nov 2017:  Our paper 'Using Brownian motion to measure shape asymmetry in mesoscopic matter using optical tweezers' has become the leading article among 2016's most accessed Soft Matter articles.   ***    Nov 2017:  New paper 'Direct verification of the fluctuation-dissipation relation in viscously coupled oscillators' has been published in Phys. Rev. E (Rapid Comm.).

Light-Matter Lab | IISER Kolkata

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Our motto: Light Matters!

Welcome to our webpage!

Our group is primarily focused on light-matter interactions in the mesoscopic domain - where light interacts with micro or nano particles. More specifically, we employ the so-called 'optical tweezers' - where light is focused to sub-micron spot sizes to confine and manipulate single mesoscopic particles - to study light-matter interactions in the regime of classical physics. Even in the quantum side, we have facilities to probe the fascinating world of quantum optics through tunable diode laser spectrosopy on dilute atomic vapors, where we can perform electromagnetically induced transparency (EIT) experiments using alkali atoms.

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Lab News

Aprl 2018: Our work 'Two-point active microrheology in a viscous medium exploiting a motional resonance excited in dual-trap optical tweezers' has been highlighted by Nature India.

Aprl 2018: Light Matter Lab congratulates Mayuri Kawale, Randhir Kumar and Umang Jain for successfully defending their Masters Thesis.

Aprl 2018: Light Matter Lab congratulates Souvik Sil for being awardedCSIR Senior Research Fellowship.

Aprl 2018: New paper 'Two-point active microrheology in a viscous medium exploiting a motional resonance excited in dual-trap optical tweezers' has been published in Phys. Rev. E.

Nov 2017: Our paper 'Dual-mode optical fiber-based tweezers for robust trapping and manipulation of absorbing particles in air' has become The paper of the week for the duration 21st Nov - 27th Nov, 2017.

Nov 2017: Our paper 'Using Brownian motion to measure shape asymmetry in mesoscopic matter using optical tweezers' has become the leading article among 2016's most accessed Soft Matter articles.

Nov 2017: New paper 'Direct verification of the fluctuation-dissipation relation in viscously coupled oscillators' has been published in Phys. Rev. E (Rapid Comm.).

Oct 2017: New paper 'Dual-mode optical fiber-based tweezers for robust trapping and manipulation of absorbing particles in air' has been published in Journal of Optics (Letters).

July 2017: Highlight in Nature India, Times of India, Ahmedabad Mirror, newsX, Business Standard, and india news.

June 2017: New paper 'In situ self-assembly and photopolymerization for hetero-phase synthesis and patterning of conducting materials using soft oxometalates in thermo-optical tweezers' has been published in Journal of Materials Chemistry C.

May 2017: Light Matter Lab congrats Tushar Saha for winning 2nd prize in best MS Thesis award 2017 in IISER Kolkata

Jan 2017: New paper 'Fast Bayesian inference of optical trap stiffness and particle diffusion' has been published in Nature Scientific Reports.

Dec 2016: Souvik Sil received one of the best poster award in 25th National Laser Symposium for the poster titled "Quantification of Photophoretic Forces from Measurments of the Brownian Dynamics of Optically Trapped Absorbing Particles".

Sept 2016: New paper 'Simultaneous measurement of mass and rotation of trapped absorbing particles in air' has been published in Optics Letters.

July 2016: Former lab member Dr. Basudev Roy has been offered faculty position at IIT- Madras.

June 2016: Highlight in Nature India.

May 2016: New paper 'Using Brownian motion to measure shape asymmetry in mesoscopic matter using optical tweezers' has been published in Soft Matter.