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CURRICULAM VITAE
Dr. KUPPAM Mohan Babu
PhD Graduate, IMEP-LAHC Lab
University of Grenoble, France
Mobile No: +91-9603214157 (INDIA)
E-mail: mohanbabuiitm@gmail.com
EDUCATIONAL BACKGROUND
2010-2014: PhD in Physics (Awarded in March 2014)
From: IMEP-LAHC Laboratory, Grenoble University, France
Supervisor: Professor Jean-Louis COUTAZ
Modeling and Characterization of LTG-GaAs optoelectronic device for its bandwidth, efficiency studies
for RF signal processing, and characterization of nanomaterials (Graphene, CNTs and QDs) using
optical and THz spectroscopy techniques.
(Financial support from European commission Marie-Curie Action MITEPHO project)
2007-2009: M.Tech. in Solid State Technology [Microwave, Semiconductors, Optics]
Department of Physics, Indian Institute of Technology Madras (IIT-Madras), India
2005-2007: M.Sc. in Physics [Applied Spectroscopy and Solar energy physics]
Department of Physics, Sri Venkateswara University, Tirupathi, India
2002-2005: B.Sc. [Mathematics, Physics, Chemistry]
Sri Venkateswara University Tirupathi, India.
RESEARCH EXPERIENCE
PhD Thesis Title: RF Signal processing using ultrafast optoelectronic devices and complementary
work terahertz spectroscopy (Oct 2010 – Feb 2014).
I have completed my PhD thesis work within the frame work of Marie-Curie action MITEPHO
(Microwave Terahertz Photonics) project at IMEP-LAHC laboratory, Grenoble University, France
recently. The main objective of my PhD thesis was to study the bandwidth and efficiency of ultrafast
photoconductive mixers for RF signal processing and also to study related materials for photo switching,
THz generation and THz high pass filters using THz spectroscopic techniques.
The part of my thesis work was devoted to the sampling, by optoelectronics means using an ultrafast
semiconductor photoconductive switch, of RF signals in the CW regime. We study the mixing of a radio
frequency (RF) signal and a modulated optical beam using an inter-digitated photoconductive switch as the
mixer. The mixing process leads to the generation of sideband frequencies to the RF transmitted signal. We
also developed a lumped element model for optical-microwave mixing and side band generation, and this
model is nicely validated by experimental data obtained with a LTG- GaAs photoswitch excited by optical
beating at 0.8-µm. We also study an optoelectronic demodulation with the same LTG-GaAs ultrafast
device. The similar studies were done using LTG-GaBiAs photoswitch at 1-µm.
Later on, we study the ultrafast carrier dynamics in InAs/InP:Fe QD layers in order to know whether they
could be used as ultrafast device for THz generation and photo-switching at 1.5-µm wavelength. This
carrier dynamics was evaluated by means of 3 different time-resolved spectroscopy experiments, namely

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optical pump-and-probe, optical pump and THz probe, and photoluminescence. We also performed
classical THz time-domain spectroscopy. Secondly, we study the electrical behavior of carbon nanotube
layers and graphene layers through THz time-domain spectroscopy. And finally, we study the THz
electromagnetic response (surface plasmons, woods anomaly) of diffractive structures (periodic holes in
metallic slab) and metallic high pass filters using THz time-domain spectroscopy and High Frequency
Structure Simulator software.
M. Tech. Project (2008-2009): Study transmission and dispersion properties of Split Ring
Resonators in microwave frequency regime.
M.Tech. project was completed in the area of Metamaterials. This project was done at Microwave
physics laboratory, IIT Madras, India. The aim of this work consists of modeling o f slit ring
resonators (ring & square shape) based on finite element methodology (FEMLAB & HFSS), design of
structure using PCB (printed circuit board), and experimental verification of transmission properties using
vector network analyzer (N5230A).
Research Associate (2009-2010): After completion of my M.Tech, I joined as a project associate at
Department of Physics, IIT-Madras.
Design and characterization of coaxial tip by using High Frequency Structure Simulator (HFSS):
Characterization of tips done within includes study of spatial resolution, resonant mode, and reflection
coefficient against shape of the tip, distance between tip-sample, sample properties. This computational
study shows that spatial resolutions is 30 times better for the proposed wedge shaped tip than the normal
cone shape tips for near field scanning microwave microscopy. Fabrication of sharper tip (≈ 10-15 µm
outer diameter) done with the help of Stepper motor by dipping methodology.
TEACHING EXPERIENCE
1. Worked as Assistant Professor at Gouthami Institute of Technology & Management for Women’s
(GITAMS) Affiliated to Jawaharlal Nehru University, Anantapur for during the period Jan, 2014
to Feb, 2015.
RESEARCH INTERESTS
• Non-linear optics, Femtosecond lasers for spectroscopy studies (optical pump-probe/THz probe,
THz time domain spectroscopy etc.)
• Ultrafast optoelectronic devices, metamaterials in Microwave and THz domain
• Dynamics in semiconductor materials, Photonics, Photovoltaic solar cells
• THz-spectroscopy (TDS, optical pump-THz probe)studies on different materials like
semiconductors, Nanomaterials (Carbon nanotubes, quantum dots, graphene)
• Generation and detection of terahertz radiation from ultrafast devices
PUBLICATIONS
Published Papers:
1. Mohan Babu Kuppam, Jean-François Lampin, Emilien Peytavit, Jean-François Roux, and Jean-
Louis Coutaz “Study of Ultrafast Semiconductor Photo-switches for CW RF Signal sampling and
Modulation” IEEE Journal of light wave technology, volume: 32, pp: 3839-3845 (2014).
2. Fabio Pavanello, Frederic Garet, Mohan-Babu Kuppam, Emilien Peytavit, Mathias
Vanwolleghem, François Vaurette, Jean-Louis Coutaz, and Jean-François Lampin “Broadband
ultra-low-loss mesh filters on flexible cyclic olefin copolymer films for THz applications” Applied
Physics Letter 102, 111114 (2013).
3. E. Dadrasnia, H. Lamela, Mohan Babu Kuppam, F. Garet, and J.-L. Coutaz “Determination of the
DC Electrical Conductivity of Carbon Nanotubes Thin Films from Terahertz Time-Domain
Measurements”, Advances in Condensed Matter Physics 2014.
4. Horacio Lamela ; Ehsan Dadrasnia ; Frédéric Garet ; Mohan Babu Kuppam ; Jean-Louis Coutaz
“Carbon nanotube terahertz spectroscopy: study of absorption and dispersion properties of SWNT

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and MWNT”, SPIE 8101, Carbon Nanotubes, Graphene, and Associated Devices IV, 81010G
(September 19, 2011).
5. Ehsan Dadrasnia ; Horacio Lamela ; Mohan-Babu Kuppam ; Frédéric Garet ; Jean-Louis Coutaz
“THz time-domain spectroscopy in different carbon nanotube thin films” , SPIE 8261, Terahertz
Technology and Applications V, 82610Y (February 9, 2012).
6. Horacio Lamela Rivera, Ehsan Dadrasnia, Dong-Mok Lee;Seunghyun Baik, Mohan Babu
Kuppam, Frédéric Garet, Jean-Louis Coutaz “Terahertz conductivity studies in carbon nanotube
networks prepared by the vacuum filtration method”, SPIE 8462, Carbon Nanotubes, Graphene, and
Associated Devices V, 84620C (September 1, 2012).
7. Fabio Pavanello, Mohan-Babu Kuppam, Frederic Garet, Emilien Peytavit, Mathias
Vanwolleghem, François Vaurette, Jean-Louis Coutaz, and Jean-François Lampin “High-
transparency metal mesh filters based on cyclic olefin copolymer films for broadband THz
applications”, IRMMW13 conference (2013).
Papers under Review:
1. Mohan Babu Kuppam, Jean-François Lampin, Emilien Peytavit, Jean-François Roux, and Jean-
Louis Coutaz “Direct Optoelectronic Demodulation of an Information Signal Carried by a RF
Frequency Signal”, IEEE Journal of photonic letters, (under review).
2. E. Dadrasnia, H. Lamela, Mohan Babu Kuppam, Jean-François Lampin “Sub-Terahertz and
Terahertz Techniques to Study the Electrical Properties of Carbon Nanotubes and Graphene”, paper
under preparation to Journal of Infrared and Millimeter waves
CONFERENCES, WORKSHOPS AND SUMMER SCHOOLS ATTENDED
1. Attended French-Europe-Japan GDR workshop on THz on 29-31 March 2011 ,France
2. Attended “Program THz” conference, 6-9 June 2012, France
3. “MITEPHO Summer School-2011”, 6-10 September 2011, Arêches, France.
4. Delivered an oral presentation on “RF Sideband Generation by Excitation of an Ultrafast LTG-GaAs
Photoconductive switch with CW Optical Beating” in “MITEPHO Summer School-2012”, on 28-31
August 2012, London.
5. Poster presentation on “Direct Optoelectronic Demodulation of an Information Signal Carried by a
RF Signal using LTG-GaAs photoswitch and Spectroscopic studies on Graphene and InAs/InP:Fe QD
Samples” in MITEPHO winterschool-2012, in December 17-19, 2012, Duisburg Germany.
6. Delivered an oral presentation on “Direct Optoelectronic Demodulation of an Information Signal
Carried by a RF Signal using LTG-GaAs photoswitch” in MITEPHO Final event-2013, in October 16-
18, 2013, Carlos III University of Madrid, Spain.
INSTRUMENTS & EXPERIMENTAL TECHNIQUES HANDELED
 Terahertz-Time Domain Spectroscopy (THz-TDS) Technique
 Optical Pump –Probe/THz probe Spectroscopy Techniques
 Lab View program based systems
 FTIR Spectroscopy
 Network Analyzer (N5230A)
 Stepper motors for precision controlling
 Spectrophotometer
 Littro-spectrograph
TECHNICAL SKILLS
Spectroscopic Techniques : THz-time domain spectroscopy, Optical pump-probe / THz-
probe techniques, Photoluminescence spectroscopy.
Operating systems : Windows 98, 2000, XP, VISTA, 7, and 8.
Packages : M S Office 2003, 2007 and 2010

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Electromagnetic (EM) solvers : Finite-element methodology based EM Solvers Such as
FEMLAB, HFSS for microwave device modeling.
Others : MATLAB (BASICS) and origin program
ACHIEVEMENTS
 Obtained European commission fund- Marie-Curie fellowship for the period of 3 years during my
PhD thesis
 Half Time Teaching Assistantship (HTTA) from IIT Madras for two years of my M.Tech,
 Secured an all India rank of 239 in GATE (admission test for M. Tech. in IIT’s) was in the top
4% in India.
 Secured a state rank of 108 in SVUCET (admission test for M.Sc in SVU), was in the top 10% in
Andhra Pradesh.
 Got cent percent marks in Mathematics during three years in my B.Sc. (Bachelor of Science)
course.
 Hold university second rank and college first rank in total marks of my bachelor degree.
COLLABORATION WITH INTERNATIONAL COMPANY’S
 Institute for Electronics, Microelectronics and Nanoelectronics (IEMN), University of Lille 1,
France
 Semiconductor Physics Institute (SPI), Vilnius, Lithuania
 Institute for Nanostructure Technologies and Analysis, University of Kassel, Germany
 Optoelectronics and Laser Technology group, Carlos-III University of Madrid, Spain
REFERENCES
Jean Louis COUTAZ Jean Francois Roux
Professor Associate Professor
My thesis Director My thesis co- supervisor
Director of IMEP-LAHC Laboratory IEMEP-LAHC Laboratory
University of Savoie University of Savoie
73376 Le Bourget du Lac Cedex 73376 Le Bourget du Lac Cedex
France France
Email: jean-louis.coutaz@univ-savoie.fr Email: jean-francois.roux@univ-savoie.fr
Frederic GARET Jean Francois Lampin
Associate Professor Associate Professor
My thesis co-supervisor My thesis co-supervisor
IEMEP-LAHC Laboratory IEMN Laboratory
University of Savoie University of Lille 1
73376 Le Bourget du Lac Cedex 59652 Villeneuve d’Ascq Cedex
France France
Email: frederic.garet@univ-savoie.fr Email: jean-francois.lampin@isen.iemn.univ-lille1.fr
PERSIONAL DETAILS
Father Name : Penchalaiah
Mother’s Name : Saraswathi
D.O.B : 08-12-1984
Material Status : Single
Sex : Male
Nationality : Indian
Permanent Address : Y.Kota (Post), Obulavaripalli (Mandal), Kadapa,
Andhra Pradesh, India. Pin-516105.