Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Jacek Swiatkiewicz"'
Autor:
W. S. Liou, Guang S. He, J. K. Samarabandu, Jacek Swiatkiewicz, Ping-chin Cheng, Prk Prasad, Ronald Berezney, S. J. Pan, Jayant D. Bhawalkar
Publikováno v:
Scanning. 18:562-566
Three-dimensional confocal imaging of polymer samples was achieved by the use of two-photon excited fluorescence in both positive and negative contrast modes. The fluorophore was a new and highly efficient two-photon induced upconverter, resulting in
Autor:
S. J. Chung, Haridas E. Pudavar, Guang S. He, Tzu-Chau Lin, D. W. Lee, Jacek Swiatkiewicz, G. S. Maciel, Paras N. Prasad, J.-I. Jin
Publikováno v:
The Journal of Physical Chemistry A. 106:7512-7520
This paper presents a study of excitation dynamics and two-photon properties in new branched poly(p-phenylenevinylene) structures which can be viewed as composed of interlinked structural units producing localized but interacting electronic excitatio
Publikováno v:
Optics Communications. 200:9-13
A hybrid near-field fluorescence microscopy, which combines near-field scanning optical microscopy and photon scanning tunneling microscopy, is demonstrated for nanoscale optical memory and photofabrication on spin-coated dye-doped polymer films. Sto
Autor:
Frank V. Bright, Kyoung-Soo Kim, Guang S. He, Tzu-Chau Lin, Jacek Swiatkiewicz, S. J. Chung, Paras N. Prasad, Gary A. Baker
Publikováno v:
Chemistry of Materials. 13:4071-4076
This paper presents a molecular design for a two-photon absorbing structure, which contains a two-dimensional molecular architecture with four arms and one bridging unit, each of these segments having an extended π-conjugation and capable of produci
Autor:
Jacek Swiatkiewicz, Alex Adronov, Kyoung-Soo Kim, Paras N. Prasad, Guang S. He, Jean M. J. Fréchet, S. J. Chung
Publikováno v:
Chemistry of Materials. 12:2838-2841
We have synthesized a series of dendrimers, generations 1 through 3, functionalized with two-photon absorbing (TPA) chromophores at their chain ends. These novel TPA materials were characterized with respect to their one- and two-photon absorption pr
Autor:
Loon-Seng Tan, Paras N. Prasad, Guang S. He, Yan Jiang, Jacek Swiatkiewicz, Bruce A. Reinhardt, Ramamurthi Kannan
Publikováno v:
The Journal of Physical Chemistry A. 104:4805-4810
Two-photon processes have recently received considerable attention, as they offer opportunities for both fundamental research and technological applications. In this paper, we illustrate both of these opportunities by reporting on a study of two-phot
Autor:
S. J. Chung, Guang S. He, Tzu-Chau Lin, and Jacek Swiatkiewicz, Paras N. Prasad, Kyoung-Soo Kim
Publikováno v:
The Journal of Physical Chemistry B. 103:10741-10745
Recent reports of molecular structures with considerably enhanced two-photon absorption cross-section have generated considerable interest in this phenomenon from both fundamental and applications perspectives. In this letter, we report cooperative e
Publikováno v:
The Journal of Physical Chemistry. 98:7307-7312
Publikováno v:
The Journal of Physical Chemistry B. 106:4040-4042
A photon scanning tunneling microscope is employed to probe the surface-plasmon-induced local field enhancement effect on two-photon fluorescence from organic nanoparticles adsorbed on silver surface. A size dependence of fluorescence enhancement and
Autor:
Paras N. Prasad, Lei Shi, Gen C. Xu, Jacek Swiatkiewicz, Hoi Sing Kwok, Donghwan Kim, Guolin Huang, Chris Lehane
Publikováno v:
Physical Review B. 48:6550-6555
We have applied a double-bridge voltage-correlation technique to study the nonequilibrium superconducting properties in high-T c superconductors. Using Y-Ba-Cu-O thin films of thickness less than 15 nm, we have observed voltage pulses as fast as 40 p