Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Heinz Spahni"'
Publikováno v:
The Journal of Physical Chemistry A. 101:6202-6213
Mixed phthalocyanines carrying one anthracene (Pc3An) or substituted naphthalene nucleus (Pc3NcR2, R = H, OCH3, or SC12H25) are proposed as low-temperature photochroms for spectral hole burning. So...
Publikováno v:
Journal of Materials Chemistry. 7:1731-1735
The chlorin–polyvinylbutyral (PVB) guest–host system has been the workhorse for most of the previously reported holographic hole burning experiments. In order to extend the spectral range and to improve on some of its properties we synthesized ch
Autor:
Heinz Wolleb, Elena A. Makarova, Heinz Spahni, Aleksander Rebane, Desiree Peone, Mikhail Drobizhev, Evgeny A. Lukyanets, Nikolay S. Makarov
Publikováno v:
SPIE Proceedings.
We study a new series of asymmetrical phthalocyanines with promising properties for two-photon 3D optical memory. The chromophores have a strong and narrow one-photon absorption (1PA) S 0 -> S 1 band at 730-760 nm, with a 200-400 cm -1 width. Tuning
Publikováno v:
SPIE Proceedings.
Phthalocyanines (Pcs) show exceptional stability against high temperatures (up to 900°C, for certain metallophthalocyanines), harsh chemical environments (strong acids and bases), γ-radiation (up to 100 MRad) and neutron radiation (up to 10 19 ther
Autor:
Aleks Rebane, Desiree Peone, Heinz Spahni, Mikhail Drobizhev, Nikolay S. Makarov, Heinz Wolleb
Publikováno v:
Nonlinear Optical Transmission and Multiphoton Processes in Organics IV.
We study one photon absorption (1PA) and two photon absorption (2PA) properties of a series of asymmetrical phthalocyanines for 2PA-based 3D optical information storage. These compounds show very large 2PA cross section. σ 2 10 3 - 10 4 GM, in near
Publikováno v:
SPIE Proceedings.
The fidelity of direct image correlation depends on the properties of the recording material. Results of plane wave interference are shown for oriented samples as well as polymer films. Also diffraction properties of holograms stored in frequency sel
Publikováno v:
SPIE Proceedings.
Using a planar, linear, waveguide second-harmonic generation was observed by nonlinear evanescent field interaction. In this class of devices phase-matching could be achieved with a periodically structured polymer adsorbate.© (1993) COPYRIGHT SPIE--
Publikováno v:
Journal of the Optical Society of America B. 24:1874
We study the requirements imposed on organic photochromes for two-photon absorption (2PA) terabyte volumetric optical storage. We present a quantitative model of signal-to-noise ratio (SNR) and signal-to-background ratio (SBR) when 2PA-induced photoc
Publikováno v:
Journal of the Optical Society of America B. 11:649
We discuss phase-matched second-harmonic generation by evanescent field interaction in waveguiding structures. Both losses for fundamental and harmonic waves as well as pump depletion are considered in a system of coupled first-order differential equ
Conference
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