Chandra Yelleswarapu

Assistant Professor.

Department of Physics
University of Massachusetts Boston
100 Morrissey Blvd.
Boston, MA , 02125 -3393


my office: S-3-80

phone: (617) 287-6063
email: Chandra.Yelleswarapu "at" umb.edu

My research activities involve both fundamental and applied research in biophotonics and nanophotonics. Especially I am focusing on developing advanced photonic devices using fiber Bragg gratings (FBG) and their applications for optical biosensing and biomedical imaging. In addition, I am working on developing advanced optical microscopes/nanoscopes for investigating live cell dynamics.

Research Interests:

  • Biomedical Imaging and Sensing
  • High power fiber lasers and fiber-optic Bragg gratings
    • photo

    Fourier phase contrast image of Ameoba

    		photo

    Multimodal image of Drosophila embryo

    		photo

    Autofluorescence image of Drosophila embryo

    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.

    • Publications:

    Common-path multimodal optical microscopy
    Chandra S.Yelleswarapu, Marla Tipping, Sri-Rajasekhar Kothapalli, Alexey Veraksa, and D.V.G.L.N.Rao
    Optics Letters, 34, 1243-1245 (2009).

    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).

    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 Patent 2008058142.

    Digital image processing methods for medical applications
    Sri-Rajasekhar Kothapalli, Chandra S. Yelleswarapu, Pengfei Wu, and D. V. G. L. N. Rao
    US Patent 20060291707.

    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.

    • Physics 601 Course Outline Fall 2005

    Physics 600 Syllabus for Spring 2005

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    University of Massachusetts Boston
    100 Morrissey Blvd.
    Boston MA , 02125 -3393
    Telephone: 1-617-287-6050
    Fax: 1-617-287-6053
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