Zobrazeno 1 - 10
of 39
pro vyhledávání: '"N. P. Economou"'
Autor:
Paul F. Liao, N. P. Economou
Publikováno v:
Optics letters. 3(5)
Magnetic-field quantum beats are observed in Doppler-free two-photon free-induction decay. The 3S-4D transition in atomic sodium vapor is studied with fields up to 300 G. A strong dependence on the polarization of the excitation pulses is observed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93559c8f3bc83f899a91008a01231199
https://pubmed.ncbi.nlm.nih.gov/19684736
https://pubmed.ncbi.nlm.nih.gov/19684736
Publikováno v:
Optics letters. 2(3)
This Letter is the first report of the observation of amplified reflection and self-oscillation produced by degenerate optical four-wave mixing by using a resonantly enhanced Kerr nonlinearity in atomic sodium vapor. Phase-conjugated reflected waves
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92871207703f02f97dbdba92da5d6d1a
https://pubmed.ncbi.nlm.nih.gov/19680405
https://pubmed.ncbi.nlm.nih.gov/19680405
Publikováno v:
Applied Physics Letters. 33:739-742
The production of cw VUV coherent radiation by four‐wave sum frequency generation in Sr vapor is reported. Significant enhancement of the nonlinearity at the output frequency is obtained upon application of large (∼50 kG) magnetic fields. Total p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49dd2eaa7e4cf8ed14bf37e6ae87ffea
https://doi.org/10.1063/1.90523
https://doi.org/10.1063/1.90523
Autor:
N. P. Economou, D. C. Flanders
Publikováno v:
Journal of Vacuum Science and Technology. 19:868-871
The x‐ray source is a critical part of any x‐ray lithography system since the source characteristics directly affect resolution, alignment, and throughput. Conventional electron bombardment sources, using either stationary or rotating anodes, are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87a356e575e7e44d3de265f8e97cb395
https://doi.org/10.1116/1.571225
https://doi.org/10.1116/1.571225
Publikováno v:
Journal of Vacuum Science and Technology. 19:1234-1237
Holographic lithography is a rapid and convenient method of exposing low distortion periodic and quasi‐periodic patterns over large areas. Spatial periods below 0.2 μm are readily achieved using commercial He:Cd lasers. However, many substrates of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6c8f4592069c42e55f393fc9c850b0d
https://doi.org/10.1116/1.571251
https://doi.org/10.1116/1.571251
Publikováno v:
Journal of Vacuum Science and Technology. 19:1172-1175
A new type of high resolution mask for ion beam lithography is described. The mask employs a thin membrane with regions of two different thicknesses to provide contrast for proton exposure of resist. A conventional ion implantation system is used to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::485ca8ee56dd43b3c4894d9a063e9f33
https://doi.org/10.1116/1.571237
https://doi.org/10.1116/1.571237
Autor:
W.T. Lindley, G.A. Lincoln, N. P. Economou, Carl O. Bozler, R.W. McClelland, R.A. Murphy, G. D. Johnson, G.D. Alley, D.C. Flanders, Jack P. Salerno, B. A. Vojak, K. B. Nichols
Publikováno v:
Journal of Applied Physics. 54:3554-3560
Transmission electron microscopy has been employed to characterize GaAs permeable base transistor structures. Submicrometer‐period tungsten base gratings fabricated on GaAs substrates by using either liftoff or etching techniques have been studied.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12e419a8c6c248a0e5e683b6665150bb
https://doi.org/10.1063/1.332423
https://doi.org/10.1063/1.332423
Publikováno v:
Physical Review Letters. 39:1473-1476
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::317c5645bfd761097a1b0f84fece1552
https://doi.org/10.1103/physrevlett.39.1473
https://doi.org/10.1103/physrevlett.39.1473
Publikováno v:
Applied Physics Letters. 38:214-217
We describe a very short (750 μm) laterally compact (1 μm electrode gap) optical directional coupler switch made with Ti‐diffused lithium niobate waveguides with a demonstrated switching time of 110 ps.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1d1bb71f966c4d27c961b71c8c92ed5
https://doi.org/10.1063/1.92313
https://doi.org/10.1063/1.92313
Publikováno v:
Physical Review A. 18:2506-2509
We report a study of the Rydberg levels of Rb in intense magnetic fields. In our experiment the field is sufficiently strong to dominate the Coulomb interaction in states of high principal quantum number. We have observed some simple systematic struc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::daa29b8e137f2883ebd25219fb71d0ea
https://doi.org/10.1103/physreva.18.2506
https://doi.org/10.1103/physreva.18.2506