Department of Physics

Indian Institute Of Technology Madras , Chennai

Ph.D admissions - July 2022-Update Click here to see the Cut off Scores / Ranks used for Shortlisting candidates.
Ph.D. Admissions July-Nov 2022 List of shortlisted candidates for PhD admissions July-November 2022
PhD Admissions July 2022 PhD Admissions July - November 2022: Written Exam and Interview Dates
SFP July 2022 SUMMER FELLOWSHIP PROGRAMME 2022 - SELECTION LIST

Dr. Sivarama Krishnan

MSB 323

DESIGNATION

Associate Professor

Ph.D.

Max Planck Insitute

CURRENT RESEARCH INTEREST

Ultrafast meets ultrasmall: We employ femto- and atto-second light pulses capture the dynamics in nano-scale systems. We explore nanoscale superfluidics with He nanodroplets. We innovate in next-gen photolithography, especially EUV and x-ray sources.

CONTACT

044 - 2257 4857

srkrishnan@iitm.ac.in

RESEARCH GROUPS

Personal Home Page

Research Group Page

Recent Book :

Book Chapter in Multiphoton Processes and Attosecond Physics - "Ignition of Doped Helium Nanodroplets in Intense Few-Cycle Laser Pulses"

S R Krishnan, L Fechner, M Kremer, V Sharma, B Fischer, N Camus, J Jha, M Krishnamurthy, T Pfeifer, R Moshammer, J Ullrich, F Stienkemeier, M Mudrich

Springer Berlin Heidelberg

2012

Current Research :

Recent Publications :

The role of defects in the nonlinear optical absorption behavior of carbon and ZnO nanostructures

Benoy Anand, SR Krishnan, Ramakrishna Podila, S Siva Sankara Sai, Apparao M Rao, Reji Philip

Physical Chemistry Chemical Physics

Volume: 16 Page: 8168 DOI: http://dx.doi.org/10.1039/C3CP55334E

Year: 2014

Photoionization of clusters in intense few-cycle near-infrared femtosecond pulses

S R Krishnan, Ram Gopal, Rajeev Rajendran, Jagannath Jha, Vandana Sharma, Marcel Mudrich, Robert Moshammer, Krishnamurthy Manchikanti

Physical Chemistry Chemical Physics

Volume: 16 Page: 8721 DOI: http://dx.doi.org/10.1039/C3CP55380A

Year: 2014

Charge transfer and Penning ionization of dopants in or on helium nanodroplets exposed to EUV radiation

D Buchta, S R Krishnan, N B Brauer, M Drabbels, P O'Keeffe, M Devetta, M DiFraia, C Callegari, R Richter, M Coreno, K Prince, F Stienkemeier, R Moshammer, M Mudrich

Journal of Physical Chemistry A

Volume: 117 Page: 4394 DOI: 10.1021/jp401424w

Year: 2013

Extreme ultraviolet ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization, and electron energy-loss spectra

D Buchta, S R Krishnan, NB Brauer, M Drabbels, P O’Keeffe, M Devetta, M Di Fraia, C Callegari, R Richter, M Coreno, K C Prince, F Stienkemeier, J Ullrich, R Moshammer, M Mudrich

The Journal of Chemical physics

Volume: 139 Page: 084301 DOI: http://dx.doi.org/10.1063/1.4818531

Year: 2013

Optical diode action from axially asymmetric nonlinearity in an all-carbon solid-state device

Benoy Anand, Ramakrishna Podila, Kiran Lingam, Siva Rama Krishnan, S Siva Sankara Sai, Reji Philip, Apparao M Rao

Nano letters

Volume: 13 Page: 5771 DOI: 10.1021/nl403366d

Year: 2013

Ignition of doped helium nanodroplets in intense few-cycle laser pulses (refereed book chapter)

S. R. Krishnan, L. Fechner, M. Kremer, V. Sharma, B. Fischer, N. Camus, J. Jha, M. Krishnamurthy, T. Pfeifer, R. Moshammer, J. Ullrich, F. Stienkemeier and M. Mudrich

Springer Proceedings in Physics

Volume: 125 Page: 385 DOI: 10.1007/978-3-642-28948-4_64

Year: 2012

Evolution of dopant-induced helium nanoplasmas

S R Krishnan, Ch Peltz, L Fechner, V Sharma, M Kremer, B Fischer, N Camus, T Pfeifer, J Jha, M Krishnamurthy, CD Schröter, J Ullrich, F Stienkemeier, R Moshammer, Th. Fennel, M Mudrich

New Journal of Physics

Volume: 14 Page: 075016 DOI: http://dx.doi.org/10.1088/1367-2630/14/7/075016

Year: 2012

Dopant-induced ignition of helium nanodroplets in intense few-cycle laser pulses

S. R. Krishnan, L Fechner, M Kremer, V Sharma, B Fischer, N Camus, J Jha, M Krishnamurthy, T Pfeifer, R Moshammer, J Ullrich, F Stienkemeier, M Mudrich, A Mikaberidze, U Saalmann, J. -M. Rost

Physical Review Letters

Volume: 107 Page: 173402 DOI: http://dx.doi.org/10.1103/PhysRevLett.107.173402

Year: 2011

Filamentation without intensity clamping

P Prem Kiran, Suman Bagchi, Cord L Arnold, Siva Rama Krishnan*, G Ravindra Kumar, Arnaud Couairon

Optics Express

Volume: 18 Page: 21504 DOI: http://dx.doi.org/10.1364/OE.18.021504

Year: 2010

Supercontinuum emission from tightly focused femtosecond pulses in air: beyond intensity clamping

P Prem Kiran, Suman Bagchi, Siva Rama Krishnan, C L Arnold, G Ravindra Kumar, A Couairon

Proc. SPIE Nonlinear Optics and Applications IV

Volume: 7728 Page: 77281P DOI: doi:10.1117/12.854218

Year: 2010

Focal dynamics of multiple filaments: Microscopic imaging and reconstruction

P Prem Kiran, Suman Bagchi, Siva Rama Krishnan, C L Arnold, G Ravindra Kumar, Arnaud Couairon

Physical Review A

Volume: 82 Page: 013805 DOI: http://dx.doi.org/10.1103/PhysRevA.82.013805

Year: 2010

Optical limiting properties of CdS nanowires

V Sai Muthukumar, J Reppert, CS Sandeep, S Krishnan, R Podila, Narayanan Kuthirummal, S Sai, K Venkataramaniah, R Philip, AM Rao

Optics Communications

Volume: 283 Page: 4104 DOI: doi:10.1016/j.optcom.2010.06.020

Year: 2010

Focusing of ultrashort sub-TW laser pulses in air: supercontinuum emission

S Bagchi, C L Arnold, S Rama Krishnan, G Ravindra Kumar, A Couairon

Proc. SPIE

Volume: 8173 Page: 81730Q DOI: doi:10.1117/12.898485

Year: 2010

Microwave-assisted solid-state grafting of multi-walled carbon nanotubes on polyurethane for the synthesis of a composite with optical limiting properties

Yuhong Chen, V. Sai Muthukumar, Yubing Wang, Cheng Li, S. Sivarama Krishnan, S. Siva Sankara Sai, K. Venkataramaniah, S. Mitra

Journal of Materials Chemistry

Volume: 19 Page: 6568 DOI: http://dx.doi.org/10.1039/B906764G

Year: 2009

Lorentzian metric induced from a background Riemannian metric

V V Reddy, R Sharma, S Sivaramakrishnan

Int. J. Pure Appl. Math.

Volume: 47 Page: 3

Year: 2008

Nonlinear optical transmission of surface-modified nickel sulphide nanoparticles: Saturation of absorption and optical limiting

V. Sai Muthukumar, J K Kiran, J Reppert, R Satyajit, Vamsi Krishna, G Nageshwar Rao, S Siva Rama Krishnan, S Siva Sankara Sai, K Venkataramaniah, A M Rao

Nano

Volume: 3 Page: 161 DOI: DOI: 10.1142/S1793292008000964

Year: 2008

Pramana – J. Phys vol. 68, pg. 547, 2007: “Systematic study of spatio-temporal dynamics of intense femtosecond laser pulses in BK-7 glass

Ram Gopal, V. Deepak and *Siva Rama Krishnan.

Pramana - Journal of Physics

Volume: 68 Page: 547

Year: 2007

Systematic study of spatio-temporal dynamics of intense femtosecond laser pulses in BK-7 glass

Ram Gopal, V. Deepak and *Siva Rama Krishnan

Pramana – J. Phys

Volume: 68 Page: 547

Year: 2007

Spacetimes through Hawking–Ellis construction with a background Riemannian metric

V. V. Reddy, R. Sharma and S. Sivaramakrishnan

Classical and Quantum Gravity

Volume: 24 Page: 3339 DOI: http://dx.doi.org/10.1088/0264-9381/24/13/012

Year: 2007

Nonlinear optical scattering and absorption in bismuth nanorod suspensions

S Sivaramakrishnan, VS Muthukumar, S Sivasankara Sai, K Venkataramaniah, Jason Reppert, Apparao M Rao, M Anija, Reji Philip, Narayanan Kuthirummal

Applied Physics Letters

Volume: 91 Page: 9 DOI: http://dx.doi.org/10.1063/1.2776020

Year: 2007

All-optical spatial filtering with power limiting materials

C. S. Yelleswarapu, P. Wu, S. –R. Kothapalli, D. V. G. L. N. Rao, B. R. Kimball, S. S. Sai, R. Gowrishankar, and S. Sivaramakrishnan

Optics Express

Volume: 14 Page: 1452 DOI: http://dx.doi.org/10.1364/OE.14.001451

Year: 2006