“Motion of Amoeba - the movement of the nucleus, contractile value and smaller organelles that move within cytoplasm are clearly visible”
Research Interests:
Nonlinear Photoacoustics
Digital Holographic Microscopy
Biosensors
Photoacoustic Tomography
High power fiber lasers and fiber-optic Bragg gratings
Research Team
Graduate Students - Research project:
Mr. Samir Laoui (PhD.Student)
Mr. Yuyu Li
Mr. Kirby Cole
Mr. Olivier Dantiste
Mr. Albert Kamanzi
Undergraduate Students:
Mr. Andrew Caide
Mr. Wendell Weaver
Ms. Mahsa Alborz
Collaborators:
Prof. Jonathan Celli (Physics Department)
Prof. Jonathan Rachford (Chemistry Department)
Prof. Tiffany Donaldson (Psychology Department)
Prof. Alexey Veraksa (Biology Department)
Prof. Ivan Kislyakov (Saint-Petersburg National Research University of Information Technologies, Mechanics and Optics)
Dr. Niyom Lue (Lincoln Labs)
Dr. Alexander Lazarev (Pressure Biosciences Inc)
Former Students:
Mr. Fiodar Hilitski (PhD student at Brandeis University)
Ms. Punitha Lavinia
Mr. Long Tan
Mr. Frank Kettenring
Mr. Lawrence Rooney
Mr. Rajendra Dulal
Fourier phase contrast image of Ameoba
Multimodal image of Drosophila embryo
Autofluorescence image of Drosophila embryo
Patents:
Systems and methods of all-optical Fourier phase contrast imaging using dye doped liquid crystals
Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, and D. V. G. L. N. Rao
US 7,738,047 B2, June 15, 2010
EP 2,275,851 A1 January 19, 2011
Systems and methods of all-optical Fourier phase contrast imaging using dye doped liquid crystals – accessory
Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, and D. V. G. L. N. Rao
US Patent 7,880,820.
EP 2,118,699 AO, under review
Systems and methods of dual plane digital holographic microscopy
Bhargab Das, Chandra S. Yelleswarapu and D. V. G. L. N. Rao, United States Provisional Patent, Filed in September 2011.
Phase based digital image processing techniques for computer aided diagnosis
Sri-Rajasekhar Kothapalli, P. Wu, Chandra S. Yelleswarapu,and D. V. G. L. N. Rao Patent Number – 7,653,2327 dated January 26, 2010
Recent Professiional Acitivity/News;
Popular article on Fourier phase contrast and multimodal optical microscope,"Simple solutions to advance microscopy imaging,"
International Innovation, Research Meida Limited, 89 (2011). - BioOptics World Facebook
(Ameoba movie)
Publications:
Parallel-quadrature phase-shifting digital holographic microscopy using polarization beam splitter
Bhargab Das, C.S.Yelleswarapu, and D. V. G. L. N. Rao
Optics Communications 285, 4954-5960 (2012)
Quantitative phase microscopy using dual plane in-line digital holography
Bhargab Das, C.S.Yelleswarapu, and D. V. G. L. N. Rao
Applied Optics 51, 1387-1395 (2012)
Dual-channel in-line digital holographic double random phase encryption
Bhargab Das, C.S.Yelleswarapu, and D. V. G. L. N. Rao
Optics Communications 285, 4262–4267 (2012)
Photonic applications with photoanisotropic nanomaterials
C.S.Yelleswarapu and D. V. G. L. N. Rao
Optics and Spectroscopy 11, 238-244 (2011)
Dual plane in-line digital holographic microscopy
Bhargab Das and C.S.Yelleswarapu
Optics Letters 35, 3426-3428 (2010)
Nonlinear photoacoustics for measuring the nonlinear optical absorption coefficient
C.S.Yelleswarapu and Sri-Rajasekhar Kothapalli
Optics Express 18, 9020–9025 (2010)
Nonlinear optics
of nontoxic nanomaterials
C.S.Yelleswarapu,
Guiru Gu, Elshad Abdullayev, Yuri Lvov and D.V.G.L.N.Rao
Enhancement of photoinduced polarization rotation in azobenzene polymer films
Chandra S.Yelleswarapu, Yuanliang Chu, Brian R. Kimball and D.V.G.L.N.Rao Optics Communications, 282, 2259-2262 (2009)
Coherent population oscillations and superluminal light in a protein complex
Chandra S Yelleswarapu, Samir Laoui, Reji Philip and D. V. G. L. N. Rao Optics Express, 16, 3844 (2008).
Optical Fourier techniques for medical image processing and phase contrast imaging
Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, and D. V. G. L. N. Rao
Review Article, Optics Communications, 281, 1876 (2008).
Passive all-optical diode using asymmetric nonlinear absorption
Reji Philip, M. Anija, Chandra S. Yelleswarapu, and D. V. G. L. N. Rao Applied Physics Letters, 91, 1411181-141183 (2007).
Slow light in bacteriorhodopsin solution using coherent population oscillations
Chandra S. Yelleswarapu, Reji Philip, Francisco J. Aranda, Brain R. Kimball,and D. V. G. L. N. Rao Optics Letters, 32, 1788 (2007).
Phase contrast imaging using photo-thermally induced phase transitions in liquid crystals
Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, Yvonne Vaillancourt, Francisco J. Aranda, B. Kimball and
D. V. G. L. N. Rao Applied Physics Letters, 89, 2111161 (2006).
All-optical spatial filtering with power limiting materials
Chandra S. Yelleswarapu, Pengfei Wu, Sri-Rajasekhar Kothapalli, D. V. G. L. N. Rao, B. Kimball,
S. Sivasankara Sai, R. Gowrishankar, and S. Sivaramakrishnan Optics Express, 14, 1451 (2006).
Nonlinear optical image processing with bacteriorhodopsin polymer films
Chandra S. Yelleswarapu, Pengfei Wu, Sri-Rajasekhar Kothapalli and D. V. G. L. N. Rao Molecular Crystals & Liquid Crystals, 446, 273 (2006).
Nonlinear optical Fourier filtering for medical image processing
Sri-Rajasekhar Kothapalli, Pengfei Wu, Chandra S. Yelleswarapu and D. V. G. L. N. Rao Journal of Biomedical Optics, 10, 0440281 - 0440287 (2005).
Spectral phase based medical image processing
Sri-Rajasekhar Kothapalli, Chandra S. Yelleswarapu, Sriram G Naraharisetty, Pengfei
Wu, and D. V. G. L. N. Rao Academic Radiology, 12, 708, (2005).
Medical image processing using transient Fourier holography in bacteriorhodopsin films
Sri-Rajasekhar Kothapalli, Pengfei Wu, Chandra S. Yelleswarapu, and D. V. G. L. N. Rao Applied Physics Letters, 85, 5836-5838 (2004).
Self-diffraction in bacteriorhodopsin films for low power optical limiting
D. Narayana Rao, Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, D. V. G. L. N. Rao, and B. Kimball Optics Express, 11, 2848 (2003).
A simple technique for indirect measurement of absorption line widths in Voigt profile regime
C. Yelleswarapu and A. Sharma JQSRT, 72, 733 (2002)
Pressure-induced self-broadening and frequency shift measurements of absorption lines of Acetylene
using Tunable Diode Laser Absorption Spectroscopy
C. Yelleswarapu and A. Sharma Journal of Quantitative Spectroscopy and Radiative Transfer , 69, 151 (2001)
Enhanced growth rate for Bragg grating fabrication in optical fibers with titania-doped
cladding
Y. Wang, L. Phillips, C. Yelleswarapu, T. George, A. Sharma, S. Burgett and P.Ruffin Opt. Commun. 163, 185 (1999).
Laser-induced chlorophyll fluorescence ratio in certain plants exhibiting leaf heliotropism
M. V. Sailaja, Y. Chandrasekhar, D. Narayana Rao and V. S. Rama Das Australian Journal of Plant Physiology, 24, 159-164 (1997).
Measurements of Optical constants of thin polymer films using white light interferometry
V. Nirmal Kumar, Chandra S Yelleswarapu and D. Narayana Rao Pramana, 47, 163-170 (1996).
Proceedings:
Completely Passive Nonlinear Transmission System using Nonlinear Absorbing Medium and Azobenzene
Films
Chandra S Yelleswarapu, Brian R Kimball, and D. V. G. L. N. Rao SPIE, 6653, 42 (2007).
The complex optical response of arrays of aligned, multi-walled carbon nanotubes
K. Gregorczyk, B. Kimball, J. Carlson, A. Pembroke, K. Kempa, Z. Ren, Chandra S. Yelleswarapu,
D. V. G. L. N. Rao, T. Kempa, G. Benham, Y. Wang, Wenzhi Li, A. Herczynski,and J. Rybczynski
SPIE Proceedings 6321, 18 (2006).
Spectroscopic studies of arrays of multiwalled carbon nanotubes
B. R. Kimball, J. B. Carlson, A. Pembroke, K. Kempa, Z.F. Ren, P. Wu, C.S. Yelleswarapu, T. Kempa,
G. Benham, Y. Wang, A. Herczynski, J. Rybczynski, Z.P. Huang, and D.V.G.L.N. Rao SPIE Proceedings, 5931, 242 (2005).
A narrow linewidth (< 1 GHz), > 35nm wavelength-tunable mid-IR fiber laser for
spectroscopic sensing applications
Ning Ma, Chandra S Yelleswarapu, Joey, Ravi K. Jain CLEO/QELS Proceedings, 1533-35 (2003).
Book Chapter:
Chandra S Yelleswarapu, Francisco J Aranda and D. V. G. L. N. Rao, "Holography in
Bacteriorhodopsin Films for Medical Applications" for "New Directions in Holography
and Speckles," American Scientific Publishers (www.aspbs.com), Edited by H. John
Caulfield and Chandra S. Vikram.
Conference Meetings:
Invited talk presented at APS March Annual Meeting, March 10-14, 2008, New Orleans,
Louisiana.
Chandra S Yelleswarapu and D.V.G.L.N. Rao, "Control of slow light with in a
protein complex," Controlling light with light, October 14-16, 2007, Olympic Valley,
CA.
Chandra S Yelleswarapu and D.V.G.L.N. Rao, "Fourier Phase Contrast Microscopy,"
Optical Society of America Annual Meeting, September 16-20, 2007, San Jose, CA.
Chandra S Yelleswarapu, Francisco J Aranda, Reji Philip, and D.V.G.L.N. Rao,
"Slow light with bacteriorhodopsin solutions," American Physical Society Annual
Meeting, March, 2007, Denver, CO.
Chandra S Yelleswarapu, Andrew Wang and D.V.G.L.N. Rao, "Holographic data storage
in nanoporous azobenzene films," Photonics, December 13-16, 2006, Hyderabad, India.
Chandra S Yelleswarapu and D.V.G.L.N. Rao, "Photo-controlled absorption in bacteriorhodopsin
films for medical image processing," Conference on Lasers and Electro-Optics, May
21-26, 2006, Long Beach, CA, paper CTuO5.
Chandra S. Yelleswarapu and D.V.G.L.N. Rao, "Optical power limiting mechanism
for image processing," Optical Society of America Annual Meeting, October 8-12,
2006, Rochester, NY.
Chandra S Yelleswarapu and D.V.G.L.N. Rao, "Optical Fourier techniques for medical
image processing," Biomedical Optics Conference, March 19-22, 2006, Fort Lauderdale,
FL, paper SH21.
Chandra S Yelleswarapu and D.V.G.L.N. Rao, "Optical Fourier Techniques for Early
Detection of Breast Cancer," International Workshop on Emerging Trends in Biological
Sciences, Sri Satya Sai University, August 8-10, 2006, India.
Sri-Rajasekhar Kothapalli, Pengfei Wu, Chandra S. Yelleswarapu, and D.V.G.L.N.
Rao, "Medical Image Processing using Transient Fourier Holography in Bacteriorhodopsin
Films," American Physical Society Annual Meeting, March 2005, San Diego, CA.
D.V.G.L.N. Rao, Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli and Pengfei
Wu, "Real-time identification of micro-calcifications in mammograms," High Speed
Photography and Photonics Conference, September 2004, Alexandria, VA.
Chandra S. Yelleswarapu, Sri-Rajasekhar Kothapalli, Pengfei Wu, D.V.G.L.N. Rao,
"Medical image processing using nonlinear optical properties in bacteriorhodopsin
films," Optical Society of America Annual Meeting, October 10-14, 2004, Rochester,
NY.
Chandra S. Yelleswarapu, Sriram Gopal Naraharisetty, Sri-Rajasekhar Kothapalli,
Pengfei Wu, Bin Wang, "Optical power limiting with azobenzene doped twisted nematic
liquid crystals," Optical Society of America Annual Meeting, October 10-14, 2004,
Rochester, NY.
Sri-Rajasekhar Kothapalli, Chandra S. Yelleswarapu, Pengfei Wu, and D.V.G.L.N.
Rao, "Image processing using real-time Fourier hologram in bacteriorhodopsin film,"
Optical Society of America Annual Meeting, October 5-9, 2003, Tucson, AZ.
Sri-Rajasekhar Kothapalli, Chandra S. Yelleswarapu, Pengfei Wu, and D.V.G.L.N.
Rao, "Novel opto-electronic image processing techniques," Optical Society of America
Annual Meeting, October 5-9, 2003, Tucson, AZ.
Chandra S. Yelleswarapu and A. Sharma, "Pressure-Induced Line Widths and Frequency
Shift Measurements For Acetylene using Diode Laser," Optical Society of America
Annual Meeting, October 22-25, 2000, Providence, RI.
C. Banks, Chandra S. Yelleswarapu, A. Sharma, D. Frazier, B. Penn and H. Abdeldayem,
"Characterization of a Fabry-Perot based electrooptic modulator," Optical Society
of America Annual Meeting, October 22-25, 2000, Providence, RI.
Education:
Ph.D. Physics/Optics; Alabama A & M University, USA, May 2001. Dissertation Title:
Line width broadening and detection sensitivity measurements using tunable diode
laser absorption spectroscopy : an application to v1+3v3 overtone
band of acetylene.
M.Phil. Physics; University of Hyderabad, India, November 1994. Thesis Title: Measurement
of optical parameters and interaction of light in thin films.
M.Sc. in Electronics; Nagarjuna University, India, April 1993.
B.Sc. (Mathematics, Physics, Electronics); Osmania University, India, April 1990.
Department of Physics University of Massachusetts Boston
100 Morrissey Blvd.
Boston MA , 02125 -3393
Telephone: 1-617-287-6050
Fax: 1-617-287-6053
The Physics Office is on the 3rd floor of the Science Center, room 105.
Questions, comments, or suggestions about this website can be sent to the Webmaster
Annie Stefanik at:
Annie.Stefanik "at" umb.edu
