Zobrazeno 1 - 10
of 139
pro vyhledávání: '"Ratnakar R. Neurgaonkar"'
Publikováno v:
Acoustics Research Letters Online. 6:125-130
Materials are investigated for coupling ultrasound between solid piezoelectric transducers and solid targets having acoustic impedances ranging between 10–20 MRayl. The majority of available acoustic couplants have impedances below 5 MRayl, leading
Autor:
Shashnk Agrawal, Ruyan Guo, Ratnakar R. Neurgaonkar, Dinesh K. Agrawal, C. B. Murray, Amar S. Bhalla
Publikováno v:
Ferroelectrics Letters Section. 31:149-156
The dielectric properties of ferroelectric Ba0.5Sr0.5TiO3 and non-ferroelectric MgO composites synthesized by using nano particles are investigated for tunable microwave applications. Dielectric properties are studied in the temperature range of −2
Publikováno v:
Physical Review Letters. 78:2960-2963
Publikováno v:
Journal of Applied Physics. 76:490-496
The complex dielectric response of strontium barium niobate relaxor ferroelectrics has been studied as a function of orientation and composition. The dielectric response was found to be strongly dependent on orientation, in distinct comparison to the
Autor:
Gregory J. Salamo, J. L. Shultz, Steven R. Montgomery, Edward J. Sharp, Nianyu Bei, Gary L. Wood, Galen Duree, Ratnakar R. Neurgaonkar
Publikováno v:
Optics Communications. 101:397-402
The transient response for beam fanning in photorefractive tungsten bronze crystals with an applied electric field and a focused laser beam is studied. Response times on the order of 1 ms for an incident power of 1 mW observed for incident beams focu
Autor:
Jeffrey G. Nelson, J.T. Cheung, J.R. Oliver, I.S. Santha, Peter E. D. Morgan, K.R. Udayakumar, Ratnakar R. Neurgaonkar
Publikováno v:
Materials Research Bulletin. 28:719-727
The sol-gel technique has been used to produce highly grain-oriented perovskite PZT thin films on lattice-matched SBN:60, SrTiO 3 and MgO substrates. These films were deposited on both La 0.5 Sr 0.5 CoO 3 (LSC) laser ablated-coated and uncoated subst
Publikováno v:
Journal of Intelligent Material Systems and Structures. 4:272-275
Perovskite PZT and PLZT ceramics have been hot- forged to densification > 98 % of their theoretical values. The piezoelectric d33 coefficient in the PLZT dense ceramics exceeds 650 pC/N compared to 550 pC/N for conventionally sintered ceramics. In ad
Autor:
Gregory J. Salamo, Edward J. Sharp, W. K. Cory, Gary L. Wood, J.R. Oliver, Ratnakar R. Neurgaonkar
Publikováno v:
Ferroelectrics. 142:167-188
The state of the art in the Czochralski growth of various optical-quality ferroelectric tungsten bronze single crystals is reviewed with respect to crystal structure, phase transitions and cationic make-up. Based on our growth of over 25 single cryst
Autor:
Brian D. Monson, Edward J. Sharp, Gary L. Wood, William W. Clark, Gregory J. Salamo, Ratnakar R. Neurgaonkar
Publikováno v:
Applied optics. 30(14)
Experimental observations are reported which demonstrate that the response time for beam fanning, self-pumped phase conjugation, and double phase conjugation can be shortened by more than an order of magnitude without a significant reduction in coupl
Autor:
Paras N. Prasad, J. Stamatoff, Alexander E. Kaplan, Rick Lytel, Mario Dagenais, Jack Feinberg, Robert L. Byer, F. J. Leonberger, Peter W. E. Smith, Robert W. Hellwarth, G. R. Meredith, A. A. Ballman, T. K. Gustafson, G. Carter, Robert L. Gunshor, C. Bowden, George Rakuljic, N. G. Peyghambarian, David Eimerl, D. H. Auston, C. L. Tang, P. A. Wolff, Elsa Garmire, R. Burnham, G. Dohler, Paul L. Kelley, Yuen-Ron Shen, George C. Valley, Daniel S. Chemla, Ratnakar R. Neurgaonkar, Anthony F. Garito, Pallab Bhattacharya, N. Menyuk, Lew Goldberg, Barry J. Feldman, Alastair M. Glass, G. Stillman, Charles L. Woods, Philip S. Brody, G. J. Bjorklund, George I. Stegeman, A. Majerfeld, Hyatt M. Gibbs, H. Temkin, M. Thakur, Robert S. Feigelson, Robert W. Boyd, Uzi Efron
Publikováno v:
Applied optics. 26(2)
The seven papers making up this assessment are based on the Workshop on Nonlinear Optical Materials held in April 1986.