Left-handed metamaterial fabricated by interleaving SRR and wire strips Publications and Press Reports

"The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living."   Henri Poincaré.

 Microwave engineering/Materials science/Physics,  Ecology/Wildlife,  Photography, Media Profiles  
Physics/Microwave Engineering/Materials Science

     
    1. "Imaging by Flat Lens using Negative Refraction", P. V. Parimi, W. T. Lu, P. Vodo, and S. Sridhar, Nature, 426, 404 (2003)
    2. " Negative Refraction and Left Handed Electromagnetism in a Microwave Photonic Crystal" P. V. Parimi, W. T. Lu, P. Vodo, J. Sokoloff and S. Sridhar,  Phys. Rev. Lett., 92, 127401-1 (2004)
    3. "Focusing by a Plano-Concave Lens using Negative Refraction", P. Vodo, P. V. Parimi, W. T. Lu, and S. Sridhar, Appl. Phys. Lett, 86, 201108 (2005)
    4. "Negative index media in microwave waveguide" P. V. Parimi, P. Vodo, S. Sridhar, J. R. Derov and B. Turchinetz, submitted to Appl. Phys. Lett Download PDF
    5. "Experimetnal Determination of Dispersion and Slow Group Velocity in Lefthanded Materials", P. V. Parimi et al, submitted APL (2004).
    6. "Microwave Photonic Crystal with Tailor-made Refractive Index", P. Vodo, P.V. Parimi, W.T.Lu, J. S. Derov, B. Turchinetz, S.Sridhar, S Appl.Phys. Lett, 85, 1858 (2004).
    7. "Slow Microwaves in Lefthanded Materials" E. DiGennaro, P. V. Parimi, W. T. Lu and S. Sridhar, Phys. Rev. B, 72, 033110 (2005)
    8.  "Common dielectric transitions at 32 K and 245K in isostructural La2CuO4+x and La2-ySryNiO4" P. V. Parimi, N. Hakim, F. C. Chou, S. W. Cheong and S. Sridhar, (in print PRB). Download PDF
    9. Microwave properties of the 40K superconductor MgB2" N. Hakim, P. V. Parimi, C. Kusko, S. Sidhar, P. Canfield, S.Bud'ko and D.Finnemore, App. Phys. Lett., 78, 4160 (2001). Download PDF
    10. "Onset of dielectric modes at 110K and 60K due to local lattice distortions in non-superconducting YBCO6.0
      11. crystals", Z. Zhai, P. V. Parimi, J. B. Sokoloff, A. Erb, and S. Sridhar, Phys. Rev. B, 63, 92508 (2001)
      Download PDF
    11. “High Frequency magneto-impedance of double perovskite La1.2Sr1.8Mn2O7: secondary transition at high temperatures”. P. V. Patanjali, P. Theule, Z. Zhai, N. Hakim, S. Sridhar, R. Suryanarayanan, M. Apostu, G. Dhalenne, and A. Revcolevschi, cond-mat/9810351, Phys. Rev. B 60, 9268 (1999). Download PS.Holder for measuring critical current density of bulk HTS, the contacts withstand current as high as 150 Amp.
    12.  “Rf susceptibility of La1-xSrxMnO3 single crystals: magnetic signatures of structural changes”, P.V. Parimi, H. Srikanth, M. Bailleul, S. Sridhar, R. Suryanarayanan, L. Pinsard, and A. Revcolevschi”, Proceedings of the MRS Fall meeting, Boston, 1999 (in press) Download PDF.
    13.  “rf Impedance of Sintered BSCCO and Melt-Textured YBCO Superconductors”, P.V.Patanjali and V. Seshu Bai,  IEEE Transsactions on Applied Superconductivity, 9, No. 3, 192 (1999).
    14.  “Observation of spin freezing and relaxation at microwave frequencies in the spin ladder compound Sr14-xCaxCu24O41” Z. Zhai, P. V. Patanjali, N. Hakim, J. B. Sokoloff, S. Sridhar, U. Ammerahl, A. Vietkine, A. Revcolevschi, Cond-mat/9903198, Submitted to Phys. Rev. Lett. Download PDF
    15.  “Non-linear microwave impedance of short and long Josephson Junctions”. Z. Zhai, Patanjali V. Parimi, S. Sridhar, Phys. Rev. B 59, 9573 (1999). Download PDF
    16.  “Field induced microwave absorption in melt textured and sintered high Tc Superconductors”. P.V.Patanjali, E. Sudhakar Reddy, V.Seshu Bai, R.M.Kadam, M.D.Sastry,  and T. Rajasekharan, Superconductor Sci. and Tech, 12, 576-681 (1999). Download PDF
    17.  “Effect of 250 MeV Ag17+ ion irradiation on Superconductivity in DyBa2Cu3O7-d  thin films”. A.Radhika Devi and V. SeshuBai,  P.V. Patanjali, R.Pinto, N.Harish Kumar, S.K. Malik, and Ravi Kumar, Nuclear Instruments and Methods in Physics Research B vol. 156, pp 54-57 (1999).
    18.  “Deposition of (YErNd)Ba2Cu3O7 ternary superconductor thin films with enhanced critical current density”, E. Sudhakar Reddy, P.V.Patanjali, E.V.Sampathkumaran, and R. Pinto, Physica C (in print).
    19.  “Polarization dynamics in La5/3Sr1/3NiO4”, N. Hakim, Z. Zhai, C. Kusko, P.V.Parimi, S.Sridhar, Proceedings of the MRS Fall meeting, Boston, 1999. Download PDF
    20.  “Search for Superconductivity in Gd1-xCexSrCuO”. E. Sudhakar Reddy,  P. V. Patanjali, E.V.Sampathkumaran, R. Pinto, and R.Vijayaraghavan, Solid State Communications,108, 63 (1998).
    21.  “Temperature dependence of rf and microwave absorption in HTSC-determination of Josephson and grain penetration depths”.  P.V.Patanjali, V.Seshu Bai, M.D.Sastry, R. Pinto and R.Vijayaraghavan, Solid State Communications,106, 203 (1998).
    22.  “Anomalous microwave absorption in GdBCO powder: \pi junctions and the paramagnetic Meissner effect”. P.V.Patanjali, V.Seshu Bai, R.M.Kadam and M.D.Sastry, Physica C 296, 188 (1998). Download PS
    23.  “Weaklink response to rf (MHz) absorption in GdBCO superconductor”. P.V.Patanjali and V.Seshu Bai, Physica C 301, 192 (1998).Download PS
    24.  “Observation of paramagnetic Meissner effect in GdBCO powder - a microwave absorption study”. P.V.Patanjali, V.Seshu Bai, R.M.Kadam and M.D.Sastry, Proceedings of the International symposium on Advances in Superconductivity - Materials, Critical currents and Devices, Sep. 17-21, 1996, TIFR, Mumbai, India.
    25.  “Microwave magnetoabsorption - virgin curves, hysteresis and random fields in BSCCO”, V.Seshu Bai, P.V.Patanjali, S.M.Bhagat and S.Tyagi  J. of Supercon. 8, 299 (1995).
    26. “Virgin response of field induced microwave absorption in the BSCCO HTSC-RSJ model”, P.V.Patanjali, V. Seshu Bai and S.M.Bhagat, Solid state Commun. 90, 809 (1994).

     
     
    1. "Far Field Focusing by a Plano Concave Negative Refractive Index Lens", Univ. of Hyderabad, Hyderabad,  India, May 2005.
    2. "Tailor-made Negative Refractive Index in Strongly Modulated Artificial Materials", IIT Madras, Chennai, India, May 2005.
    3. "Lefthanded Electromagnetism in Photonic Crystals and Metamaterials", IEEE Lasers and Electro-Optics Society, MIT Lincoln Lab, Lexington, MA, April 2005.
    4. "Lefthanded Electromagnetism in Photonic Crystals and Metamaterials", Physics Department, Colorado School of Mines, March 2005. 
    5. "Novel Concepts in Microwave Technologies: from imaging by flat lens, to ultra sentive phase shifters to microwave hyperthermia for cancer therapy", M/A-COM, Tycoelectronics, Lowell, December 2004.
    6. "Slow microwaves and lefthanded electromagnetism in artificial materials", GML, Northeastern University, Boston, June 2004.
    7. "Lefthanded electromagnetism in Photonic crystals and Metamateials" Boeing, Phantom Works, Seattle, May 2004
    8. "Left-handed Metamaterials", MA/COM - Tycoelcetronics, Lowell,  November 2003.
    9. "Turning Light on its Head in Novel Flat Lenses", Northeastern University, Boston, October 2003.
    10. "Negative Refraction and Imaging by Microwave Photonic Crystal", PIERS, Honolulu, October 2003.
    11. "Detemination of Material Parameters of Left handed Metameterial", PIERS, Honolulu, October 2003.
    12. "Negative Index Media:  Waveguide transmissiona and refraction" , APS Meeting, Austin, March 2003.
    13. "Microwave experiemtns on Left-handed metamaterials", PIERS , MIT, Cambridge, August 2002.
    14. "Local lattice distortions in LCO and LSNO: Microwave dielectric measurements", Univ. of Paris, Orsay, October 2001. 
    15. "Microwave electromagnetic response of HTS and MgB2", Advances in Superconductivity and
      16. Magnetism : Materials, Mechanisms and Devices (ASMM2D-2001), TIFR, India, September 2001.
    16. "Dielectric Transitions driven by local lattice distortions in perovskite oxides, YBa2Cu3O6.0, La2MO4 (M=Cu, Ni) and SrxCuyOz ", American Physical Society Meeting, Seattle, March 2001.
    17. "Microwave response of superconducting, insulating and magnetic  perovskite oxides", University of Paris, June 2000.
    18. “Charge polarization dynamics of spin-ladder and spin-chain SrCuO cuprates”, APS March Meeting, Minneapolis, March 20-25, 2000.
    19. “rf susceptibility of La1-xSrxMnO3 single crystals: magnetic signatures of structural changes”, MRS Fall meeting, Boston, November, 1999.
    20. “Spin Dynamics of Perovskite CMR Materials at Radio Frequencies”, American Physical Society Centennial Meeting, March 1999, Atlanta, USA.
    21. “ Radio and Microwave dynamic response of HTS materials”, Tata Institute of Fundamental Research, June 1997, Mumbai, India.
    22. "Investigation and tailoring of Josephson junctions in GdBCO and BSCCO Superconductors", University of Hyderabad, India, September 1997.
    23. “Marginal oscillator for measuring surface impedance of superconductors” 14th World Congress on Nondestructive testing, Dec. 8-13, 1996, New Delhi, India.
    AFM image of ternary copper oxide HTS deposited by PLD, grain size 0.5 microns.
     
     
  1. "Negative refraction and Imaging by Photonic Crystals", MRS Fall Meeting, Boston, Dec 2003. 
  2. “Microwave signatures of the pseudo-gap YBCO, Hg:1223 and Hg:1201”, 6th Internatioanl Conference on Materials and Mechanisms of Superconductivity and HTS, Feb20-25, 2000, Houston, USA.
  3. “Temperature and field dependent rf surface impedance in BSCCO and melt textured YBCO”, 1996-Applied superconductivity Conference, Aug. 25-30, 1996, Pittsburgh, USA.
  4. “Observation of paramagnetic Meissner effect in GdBCO powder- a microwave absorption study”, International symposium on ASMCCD, Sep 17-21, 1996, TIFR, Mumbai, India.
  5. “Observation of anomalous frequency shift in GdBCO - a study of radio frequency impedance”, International Workshop on HTSC - 10 years after its discovery, Dec 1996, Jaipur, India (awarded best presentation).
  6. “Low field switching of hysteretic microwave magnetoabsorption in 110K phase BSCCO superconductor”, Presented at the Applied Superconductivity Conference, 16-21 Oct 1994, Boston, USA.
  7. “Radio frequency absorption studies in BSCCO superconductor”, Proceedings of the DAE Solid State Physics Symposium, Vol 37C, pp 372, 1994.
  8. “Study of flux pinning in HTSC using radio frequency absorption”, Indo - US Workshop on Ordering Disorder Prospect and Retrospect in Condensed Matter Physics, Dec 29 1992 Jan 5 1993, Hyderabad.
  9. “Transport current density measurements in quench melt grown YBCO samples”, Proceedings of the DAE Solid State Physics Symposium, Vol 35C, pp 319, 1991. 

    10.  



Press Reports

    1. Interviewed on CN8 Comcast TV Network in its "nite beat" live program on research in metamaterials, 5 June 2006.
    2. On the cover of  Applied Physics Letters, 15 May Issue, 2005: Demonstration of  focusing by plano concave leftahnded lens
    3. Science, (December 2003), 
    - Research on Flat Lens Imaging was quoted in one of the ten Scientific Breakthroughs of the year 2003 (December '03). Science quotes our work; "...Another team, meanwhile, snapped the first-ever image with a flat lens made from a left-handed material. Ultimately, such lenses promise to generate far less distortion than standard optics"
    5.  American Physical Society News, Vol 13, Feb 2004,
    -Research on Flat Lens Imagng and the determination of Negative Refractive Index were shortlisted as highlights of Physics Research in 2003.
    4 Physics Today (May 2003), 
    - First determination of complex material parameters of  Left Hnaded Metamaterial with negative refractive index
    6. American Institute of Physics (March 2003), 
    7. New Scientist (April 2003) and
    8. American Physical Society News (May 2003).
    9. CERN Courier, Feb 2004

    Several popular newspapers have also written articles about our work; to name a few,

    10. The Hindu, 11 Dec 2003.
    11. The Northeastern Voice (Jan 2004)     

    Work Uppalapdu Bird Habitat Conservation was reported by several Indian national newspapers

     10 December 2002 (language English),
    19 October  2002 ( Telugu),
    7 October  2002 (English),
    5 October  2002 (English),
    1 October 2001 (Telugu),
    30 September 2001 (Telugu)

    Click on the images for larger view

    Ecology/Wildlife

     
  1. "Sustainable development in Uppalapadu through E-Conservation" Sailaja Elchuri, Ramanamurthy B. Vadrevu and Patanjali V. Parimi, Development by Design, Thinkcycle Workshop, IISc, Bangalore,  June (2002).
  2. "E-Conservation: A Novel System for Purposeful Environment", Patanjali V. Parimi, Development by Design, Thinkcycle Workshop, MIT, Cambridge,  June 22 (2001). download e-conservation.doc

    3.  
    ( My fortnightly column in The Hindu will be starting soon, check for it later....).
  3. “Let the Scales Fall”, Patanjali V. Parimi, The Hindu, September 21, (1996).
  4. “Birdman Salim Ali”, Patanjali V. Parimi, The Hindu, January 18, (1997).
  5. "Jeeva Vividhyam lopiste maanava manugada asaadhyam", Vaartha, October 12, (2000). Article in Telugu on the deaths and poaching of Tigers in India, translated by Narayana Bojja.
  6. "Checklist of the Birds of University of Hyderabad Campus" Patanjali V. Parimi (unpublished) (1997) .
  7. "Unusual Praying Mantis", Patanjali V. Parimi, Nature News, University of Hyderabad, (1990).

    8.  
     
  8. Panel member: "Environmental Balance in the Economic Development of India", Telececast on Doordharsan, Indian National Network, June 1996.
  9. "Bharatpur Rhapsody", (on  avi-fauna of Bharatpur Bird Santuary), Univ. of Hyderabad, March 1997.
  10. "Lords of air" (on evolutionary biology of birds) Tata Institute of Fundamental Research, Mumbai, January 1998.




     
  1. "Sravya", Patanjali. V. Parimi, Sketches of the Eye, Coffee table anthology published by the International Library of Photography, ISBN 0-7951-5095-4 (2001).
  2. “Let the Scales Fall”, Patanjali V. Parimi, The Hindu, September 21, 1996 (3 photographs).NASA, Houston
  3. “Bidman Salim Ali”, Patanjali V. Parimi, The Hindu, January 18, 1997 (2 photogrpahs).
  4. Study India Program, University of Hyderabad, 1997 (11 photographs).
  5. Annual Report, University of Hyderabad, 1995-96 (2 photographs).
  6. Annual Report, University of Hyderabad, 1994-95 (2 photographs).
  7. Donated about 50 photographs to the University of Hyderabad,1995-97.
Sports

        1.  "Kasparov, the last emperor?", Patanjali Parimi, 2003


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