International University

G Krishna Podagatlapalli

G Krishna Podagatlapalli

**********.**@*****.***/ ********@*****.*****.**

Ph.No: +91-837*******

Communicate Address:

C/o: Assoc. Prof. Soma Venugopal Rao

Advanced Centre of Research in High Energy Materials

South Campus

University of Hyderabad (UoH)

Gachibowli, Hyderabad, India, Pin-500046.

Current area of research: Fabrication og plasmonic nanomaterials by ultrafast laser ablation in

aqueous media and their applications to explosive detection via surface enhanced Raman spectroscopy,

nanophotonic applications via degenerate four wavemixing and coherent anti-stokes Raman scattering

(CARS)

Nationality and date of birth: Indian, 21st June, 1981.

Objective:

Seeking a suitable postdoctoral position to utilize my skills and abilities in a well reputed research

group that offers opportunities to contribute towards scientific excellence.

Research interests:

G Krishna Podagatlapalli

• Ultrafast laser ablation of plasmonic materials

• Nonlinear optical properties of nanomaterials and organic molecules

• Surface enhanced Raman scattering (SERS) spectroscopy of explosive molecules from laser ablated

silver/gold/copper targets.

• Time reolved studies using degenerate four wavemixing and pump probe experimets

• Raman signal enhancesmnets, dephasing life time measurements of Raman modes by coherent anti-

Stokes Raman scattering experiment

Education:

2009- present PhD candidate in ACRHEM, University of Hyderabad

Writing the thesis and expected to submit in the month of May, 2014

Thesis Tittle: Ultrafast ablation of Plasmonic metals in liquids for SERS, Photonics and

development of DFWM/CARS experiments

Supervisor: Dr. Soma Venugopal Rao

2002-2004: M.Sc. Physics with specialization Nuclear and particle physics ( secured I class, Grade:

67% ) Andhra University, Andhra Pradesh, India.

1998-2001: B.Sc. Mathematics, Physics, Computerscience (secured I class, Grade : 69%), Andhra

University, Andhra Pradesh, India.

Awards and Recognitions:

• I st Asia HEDS 2014 held in Busan,

Jan 2014 Selected and participated in the

South Korea

• Received best poster award in INDO-US International Workshop on Nano-sensor Science &

Technology(IWNST-2013) 27th February-1st March, 2013 Berhampur, Odisha, India .

• Received best poster award in Frontiers in Physics (FIP-2012), 27 th -29th Sept 2012,

University of Hyderabad, Hyderabad, India.

G Krishna Podagatlapalli

• Received best poster award in 8th International High Energy Materials Conference and Exhibit

(HEMCE 2011), 10-12 November, Terminal Ballistics Research Laboratory, Chandigarh, India.

(POSTER)

Research Experience:

• Broad knowledge and experience in executing the multi-step fabrication of plasmonic nanomaterials

through laser ablation using ultrafast laser pulses.

• Extraction of nonlinear optical properties of plasmonic nanocolloids and organic molecules by an

experimental technique “Z-Scan”.

• Experise in setting up time resolved studies such as degenerate four wavemixing (DFWM) and

pump-probe experiments to investigate excited state dynamics.

• Experience in the upgradation of DFWM experiment to coherent anti-Stokes Raman scattering

experiment to enhance the signal to noise ratio. In this experiment we generated white light

continuum (WLC) in of the three paths.

Research Landmarks:

• Investigation of polarity effect of thesolvent on the products of Al nanoparticles sizes in solvents

such as chloroform and carbon tetrachloride (Chemical physics letters, 2012)

• Effect of doule line ablation fabrication effective Ag nanoparticles for NLO applications and

effective SERS active substartes for explosive molecule detection ( J. Applied Physics, 2013)

• Effect of angle of laser incidence on the target surface immersed in double distillledwater to

fabricate Ag nanoparticles for NLO applications and Ad substrates for trace level explosive detection

(ANTA). Investigation of favourable angle of laser incidence for fabrication of nanomaterials using

laser ablation in liquids. (Appl. Surf. Sci, 2014).

• A review was written to explain extensive investigation of laser ablation and the applications of

nanomaterials such as surface enhanced Raman spectroscopy (SERS), Nonlinear optical

instrumentation, and anti-bacterial agents. (J. Nanosci. Nanotech, 2014)

Instrumental Skills:

Instruments Handled:

• A chirped pulse amplified (CPA) Ti: Sapphire laser system (LEGEND, Coherent) delivering nearly

transform limited laser pulses (~2 ps/40 fs, 1 kHz repetition rate) at 800 nm. The amplifier was

seeded with ~15 fs (55 nm FWHM ) pulses from an oscillator (MICRA, Coherent, 1 W, 80 MHz, 800

nm central wavelength).

• Signal recovery 7265 lock-in –amplifier was utilized to record auto-correlation traces and DFWM

traces and to record nonlinear absorption and refraction processes.

• Perkin Elmer UV-Vis absorption spectrometer was utilized extensively for characterizing the

prepared plasmonic nanomatyertilas.

G Krishna Podagatlapalli

• All other opticl components like mirros, beam splitters, motorized stages (interfaced with

LabVIEW), lenses, retardors, were utilized in our laboratory.

Publications

1. E.D. D’Silva, G. Krishna Podagatlapalli, S. Venugopal Rao, D. Narayana Rao S.M. Dharma

Prakash, New, high efficient non-linear optical chalcone co-crystal and structure property

relationship, Crystal. Growth. Design 11, 5362-5369, 2011. Impact factor-4.689.

2. E.D. D’Silva, G. Krishna Podagatlapalli, S. Venugopal Rao, S.M. Dharma Prakash, Structural,

optical and electrical characteristics of a new NLO crystal, optics and Laser technology, 44, 1689-

1698, 2012. Impact factor-1.365.

3. G. Krishna Podagatlapalli, Syed Hamad, S. Sreedhar, Surya P. Tewari, S. Venugopal Rao,

Fabrication and characterization of aluminum nanostructures and nanoparticles obtained using

femtosecond ablation technique, Chemical Physics Letters, 530, 93-97, 2012. Impact factor-2.145.

4. E.D. D’Silva, G. Krishna Podagatlapalli, S. Venugopal Rao, S.M. Dharma Prakash, Study on third-

order nonlinear optical properties of 4-methylsulfanyl chalcone derivatives using picosecond pulses,

Materials Research Bulletin, 47, 3552-3557, 2012. Impact factor-1.913.

5. G Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari, S. Sreedhar, Muvva D. Prasad, and S.

Venugopal Rao, Silver nano-entities through ultrafast double ablation in aqueous media for SERS

and photonics applications J. Applied Physics, 113, 073106, 2013. Impact factor-2.21.

6. B.S. Singh, H.R. Lobo, G. Krishna Podagatlapalli, S. Venugopal Rao, Thiazole Based Novel

Functional Colorants: Synthesis and Nonlinear Optical Studies, Optical Materials, 34, 962-967,

2013. Impact factor-1.92.

7. Syed Hamad, G Krishna Podagatlapalli, Surya P. Tewari, and S. Venugopal Rao, Influence of

picosecond multiple/single line ablation on Copper nanoparticles and nanostructures fabricated for

surface enhanced Raman spectroscopy and photonics applications, J. Physics D. Applied Physics 46, 485501, 2013. Impact factor-2.53.

8. S. Venugopal Rao, G. Krishna Podagatlapalli, S. Hamad, Ultrafast Laser Ablation in Liquids for

Nanomaterials and Applications, J. Nanoscience and Nanotechnology 14(1), 1364-1388, 2014.

Impact factor-1.7.

9. G. Krishna Podagatlapalli, S. Hamad, Md. Ahamad Mohiddon and S. Venugopal Rao, Effect of

oblique incidence on silver nanomaterials fabricated in water via ultrafast laser ablation for

photonics and explosives detection, Applied Surface Science 303 (2014) 217–232. Impact

factor-2.1.

G Krishna Podagatlapalli

10. S. Hamad, G. Krishna Podagatlapalli, V.S. Vendamani, S.V.S. Nageshwara Rao, A.P. Pathak, and

S. Venugopal Rao,Femtosecond Ablation of Silicon in Acetone: Tunable Photoluminescence from

Generated Nanoparticles and Fabrication of Surface Nanostructures, J J. Phys. Chem. C 2014, 118,

7139 7151.. Impact factor-4.8.

11. G. Krishna Podagatlapalli, S. Hamad, and S. Venugopal Rao, effect of polar-polar miscible and

immiscible solvents in fabrication of SERS active platforms through laser ablation in aqueous media.

(manuscrtipt is under preparation)

12. G. Krishna Podagatlapalli, S. Hamad, and S. Venugopal Rao, Fabrication of Ag-Au, Ag-Cu, Au-Cu

nanomaterials by femtosecond lser ablation and their application to detection of 1 nitro pyrazole

(manuscrtipt is under preparation)

Presentations:

Oral Presentations

1. Near field detection of RDX,TNT, CL-20 and ANTA explosive molecules through surface enhanced

Raman scattering using laser ablated silver targets in aqueous media ” 9 th International High Energy

Materials Conference and Exhibits (HEMCE), Feb 13-15 th 2014, Vikram Sarbhai Space Centre,

Thituvananthapuram, India .

Posters Presentations

National/International conference papers

1. G. Krishna Podagatlapalli, Syed Hamad, S. Venugopal Rao, “Near field detection of RDX,TNT,

CL-20 and ANTA explosive molecules through surface enhanced Raman scattering using laser

ablated silver targets in aqueous media ” 9 th International High Energy Materials Conference and

Exhibits (HEMCE), Feb 13-15 th 2014, Vikram Sarbhai Space Centre, Thituvananthapuram, India

(ORAL).

2. G. Krishna Podagatlapalli, Syed Hamad, S. Venugopal Rao, Explosive detection with plasmonic

nanomaterials via surface enhanced Raman spectroscopy fabricated by ultrafast laser interaction,

High Energy Density Sciences in Asia (Asia HEDS), Jan 19- 22nd Busan, South Korea (POSTER)

3. G. Krishna Podagatlapalli, Syed Hamad,,S. Venugopal Rao, “Effect of non-zero angle of

incidence on the fabrication of silver nanomaterials through picosecond laser ablation in water”

DAE-BRANS National Laser Symposium (NLS-22), 8 th – 11th Jan 2014, Department of Atomic

and nuclear Physics, Manipal University, Manipal, Karnataka, India (Poster)

4. G. Krishna Podagatlapalli, Syed Hamad, S. Venugopal Rao, “Fabrication of silver nanomaterials

through ultrafast ablation in liquids and their applications in photonics and SERS studies of

G Krishna Podagatlapalli

explosive molecules ”Theme meeting on ultrafast science (UFS), Oct 25-26, 2013, IIT

Kharagpur,West Bengal, INDIA (POSTER).

5. G. Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari, S. Venugopal Rao, “Nanoscale Silver

and Copper Fabricated Using Ultrafast Laser Ablation in Liquids for SERS Studies of

Explosives,”7thInternation Conference on Materials for Advanced Technologies(ICMAT),30 June-

05 July 2013, Suntec, Singapore.(POSTER).

6. G. Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari,S. Venugopal Rao,“ Nanoscale silver and

copper fabricated using ultrafast laser ablation in liquids for SERS studies of explosives, ”INDO-

US International Workshop on Nano-sensor Science & Technology(IWNST-2013) 27th February-

1st March, 2013 Berhampur, Odisha, India.(RECEIVED BEST POSTER AWARD).

7. S. Venugopal Rao, G. Krishna Podagatlapalli, Syed Hamad, S. Sreedhar, Surya P. Tewari,

“Ultrafast Laser Ablation: Creating Nanoparticles and Nanostructures for Applications in Photonics

and Surface Enhanced Raman Scattering” Second International Conference on Advanced in

Materials Processing and Characterization(AMPC2013),Anna University, Chennai, February 6-

8,2013.(ORAL).

8. G. Krishna Podagatlapalli, Syed Hamad, S. Sreedhar, Surya P. Tewari, S. Venugopal Rao,

“Fabrication of silver nanoparticles and nanostructures through Ultrafast double ablation” Frontiers

in Physics (FIP-2012), 27th -29th Sept 2012, University of Hyderabad, Hyderabad, India

(RECEIVED BEST POSTER AWARD) (Poster)

9. G. Krishna Podagatlapalli, Syed Hamad, S. Sreedhar, Surya P. Tewari, S. Venugopal Rao,

“Fabrication of silver nano-entities through ultrafast laser ablation and their characterization for

SERS applications,” 23rd International Conference on Raman spectroscopy (ICORS - 2012),12-17

August, IISc, Bangalore, INDIA. (POSTER)

10. G. Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari, S. Venugopal Rao, “Fabrication and

characterization of aluminum nanostructures using femtosecond ablation technique,” International

conference on advanced nanomaterials and nanotechnology (ICANN 2011), IIT Guwahati,

December 8-10, 2011. (POSTER)

11. G. Krishna Podagatlapalli, Syed Hamad, M. Venkatesh, Surya P. Tewari, S. Venugopal Rao,

“Measurement of femtosecond pulse duration using a simple web camera” DAE-BRANS National

Laser Symposium (NLS-19), 1st – 4th December 2010, RRCAT, Indore, India (Poster)

12. G. Krishna Podagatlapalli, Syed Hamad, Surya P. Tewari, S. Venugopal Rao, “Femto second laser

ablation of bulk aluminum in liquids: Generation of nanoparticles an nano-structures,” presented at

International workshop on Recent Trends in Nano-photonics, IIT Delhi, New Delhi,30September-

01 October 2011.(POSTER).

13. Syed Hamad, G. Krishna Podagatlapalli, Surya P. Tewari,S. Venugopal Rao, “Synthesis of Cu2O,

CuCl and Cu2OCl2 nanoparticles by ultrafast laser ablation of copper metal in liquid media” DAE-

BRANS National Laser Symposium (NLS-21), 6 th – 9th Feb 2013, Bhabha Atomic Research

Centre, Mumbai, India (Poster)

14. Syed Hamad, G Krishna Podagatlapalli, Arif Hussain, Niyaz Ahmed, S. Sreedhar, Surya P.

Tewari, and S. Venugopal Rao, “Fabrication of metal nano-entities using ultrafast laser ablation for

SERS, Photonics and Biomedical applications,” International Conference on Fiber Optics and

Photonics (Photonics-2012), 09-12 December 2012, IIT Madras, Chennai, India (Poster)

15. Syed Hamad, G Krishna Podagatlapalli, Arif Hussain, Niyaz Ahmed, S. Sreedhar, Surya P.

Tewari, and S. Venugopal Rao, “Fabrication of copper nanoparticles in liquids using ultrafast laser

ablation: Biomedical, Photonic, SERS applications,” Frontiers in Physics (FIP-2012), 27 th -29th Sept

2012, University of Hyderabad, Hyderabad, India (Poster)

G Krishna Podagatlapalli

16. Syed Hamad, G. Krishna Podagatlapalli, S. Sreedhar, Surya P. Tewari,S. Venugopal Rao, “Surface

enhanced Raman scattering studies from stable copper colloids fabricated by laser ablation,” 23rd

International Conference on Raman spectroscopy (ICORS - 2012),12-17 August, IISc, Bangalore,

INDIA. (POSTER)

17. Syed Hamad, G. Krishna Podagatlapalli, Surya P. Tewari, S. Venugopal Rao, “Femtosecond

ablation of Aluminum for synthesis of nanoparticles and nanostructures and their optical

characterization,” SPIE Photonics West,21-26 January 2012, San Francisco, California, USA.

(POSTER)

18. Syed Hamad, G. Krishna Podagatlapalli, L. Giribabu, Surya P. Tewari, S. Venugopal Rao,

“Femtosecond and picosecond nonlinear optical studies of Corroles,” SPIE Photonics West,21-26

January 2012, San Francisco, California, USA. (POSTER)

19. Syed Hamad, G. Krishna Podagatlapalli, S. Sreedhar Surya P. Tewari, G. Manoj Kumar, S.

Venugopal Rao, “Synthesis and characterization of Aluminum nanoparticles obtained using

femtosecond laser ablation,” 8thInternational High Energy Materials Conference and Exhibit

(HEMCE 2011), 10-12 November, Terminal Ballistics Research Laboratory, Chandigarh, India.

(POSTER) (RECEIVED BEST FIRST POSTER AWARD)

20. Syed Hamad, G. Krishna Podagatlapalli, Surya P. Tewari, S. Venugopal Rao, “Femtosecond laser

ablation of bulk aluminum in liquids: Generation of nanoparticles and nanostructures,” presented at

International workshop on Recent Trends in Nanophotonics,IIT Delhi, New Delhi, 30 September

-01 October 2011. (POSTER)

21. Syed Hamad, G. Krishna Podagatlapalli, L. Giribabu, Surya P. Tewari, S. Venugopal Rao,

“Femtosecond and Picosecond Optical Nonlinearities of Corroles Studied using Z- Scan

Technique,” Optics’11-A conference on light,May 23-25, 2011, Calicut, Kerala, India. (ORAL)

Reference:

Dr. Soma Veugopal Rao

(Supervisor)

Associate Professor

ACRHEM

University of Hyderabad,

Hyderabad-500046, India

e-mail: *********@*****.***

Tel: +91-996*******.

Contact this candidate