Zobrazeno 1 - 10
of 83
pro vyhledávání: '"H. A. Eggert"'
Publikováno v:
Ferroelectrics. 340:63-67
Two different methods for light-induced domain inversion in lithium niobate crystals are currently under investigation. Illumination with ultra-violet light with photon energies smaller than the band gap (wavelength λ = 334 nm) can reduce the coerci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db415562cc387049bfa94f60ee20f96b
https://doi.org/10.1080/00150190600888900
https://doi.org/10.1080/00150190600888900
Publikováno v:
Applied Physics B. 92:79-81
Phase gratings are recorded holographically with nanosecond light pulses by the interference of two plane waves in colored liquid samples using the thermooptic effect. The samples consist of toluene and distilled water which are immiscible and have d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61ced0ef4f4e30e0058f29112e432c67
https://doi.org/10.1007/s00340-008-3057-8
https://doi.org/10.1007/s00340-008-3057-8
Autor:
Klaus Meerholz, H. A. Eggert, Markus Kaiser, Judith R. Schwesyg, E. Śliwińska, Karsten Buse, S. Khalil
Publikováno v:
Applied Physics B. 89:15-17
Stable suspensions of iron- or copper-doped lithium niobate nanocrystals in heptane are prepared by high-energy ball milling of iron- and copper-doped bulk crystals for 25 h. The distribution of particle sizes is determined by means of dynamic light
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76738cdd9960e0d885e1eb2b099aeb8a
https://doi.org/10.1007/s00340-007-2750-3
https://doi.org/10.1007/s00340-007-2750-3
Publikováno v:
Acta Neurochirurgica. 108:91-99
The authors review 26 patients with deep-seated cavernous angiomas which were removed by microsurgery. Ten of the angiomas were located in the insula and basal ganglia, 2 in the thalamus, 5 in the midbrain, 8 in the pons, and 1 in the brachium pontis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77b631cb483d1dc77a4b0e2dfb1adee6
https://doi.org/10.1007/bf01418515
https://doi.org/10.1007/bf01418515
Publikováno v:
Optics letters. 31(4)
Holographic gratings are recorded in colloidal suspensions of silver nanoparticles by utilizing interfering nanosecond pulses. The diffraction efficiency is measured with continuous-wave light. An instantaneous response together with a transient grat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2103330b591e079efa0a4edec76366f1
https://pubmed.ncbi.nlm.nih.gov/16496882
https://pubmed.ncbi.nlm.nih.gov/16496882
Publikováno v:
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.
Thermal gratings are recorded in silver nanoparticle suspensions by nanosecond pulsed holography. Initial transients in diffraction efficiency demonstrate competing effects in grating formation. The gratingpsilas final decay is consistent with the su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c5f681ae7b6dc37452c8d93a1c6854b
https://doi.org/10.1109/cleo.2006.4627575
https://doi.org/10.1109/cleo.2006.4627575
Publikováno v:
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.
Inhomogeneous illumination causes charge separation in a lithium niobate crystal which results in field gradients in proximity to the crystal surface. We recorded diverse patterns and utilized the field gradients to trap micro- and nanoparticles.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c01f2c9231cb1abec400af93eccdc0c1
https://doi.org/10.1109/cleo.2006.4628118
https://doi.org/10.1109/cleo.2006.4628118
Publikováno v:
2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference.
Utilizing the photorefractive effect, space-charge fields are recorded in near-stoichiometric, iron-doped lithium niobate crystals. Together with an external electric field these can lead to tailored inversion of ferroelectric domains.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69a4e021e2ebee934fe6364301fafd0e
https://doi.org/10.1109/cleo.2006.4627679
https://doi.org/10.1109/cleo.2006.4627679
Publikováno v:
Scopus-Elsevier
Elementary holographic gratings are recorded in iron-doped near-stoichiometric lithium niobate crystals in the presence of an external electric field close to the coercive field. The resulting diffraction efficiency ? vanishes upon subsequent homogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::695a30fda44da56184060b2ff1bd5a39
https://doi.org/10.1364/pemd.2005.101
https://doi.org/10.1364/pemd.2005.101
Publikováno v:
Optics letters. 29(21)
Photorefractive gratings are recorded in lithium niobate crystals in the presence of externally applied electric fields close to the coercive field. After optical erasure a voltage pulse above the poling threshold is applied, and by these means a pho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58e64eaa5ad1577ea9c14e09c53ca37c
https://pubmed.ncbi.nlm.nih.gov/15584266
https://pubmed.ncbi.nlm.nih.gov/15584266