Christian Junge

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We demonstrate highly efficient switching of optical signals between two optical fibers controlled by a single atom. The key element of our experiment is a whispering-gallery-mode bottle microresonator, which is coupled to a single atom and interfaced by two tapered fiber couplers. This system reaches the strong coupling regime of cavity quantum(More)
Light is often described as a fully transverse-polarized wave, i.e., with an electric field vector that is orthogonal to the direction of propagation. However, light confined in dielectric structures such as optical waveguides or whispering-gallery-mode microresonators can have a strong longitudinal polarization component. Here, using single (85)Rb atoms(More)
The evanescent coupling of light between a whispering-gallery-mode bottle microresonator and a subwavelength-diameter coupling fiber is actively stabilized by means of the Pound-Drever-Hall technique. We demonstrate the stabilization of a critically coupled resonator with a control bandwidth of 0.1 Hz, yielding a residual transmission of (9±3)×10(-3) for(More)
The European grayling (Thymallus thymallus) is a locally endangered and economically important freshwater salmonid fish that is distributed across a large part of Europe. Here we report 19 polymorphic microsatellites, doubling the number of available markers. Of those, 17 loci amplified in the closely related Arctic grayling (T. arcticus). Seven, six and(More)
The origin of a p o g a m o u s spo rophy te s f rom t he s econda ry p r o t o n e m a in mosses was observed by Baue r [1,2] in t he d ip lophase and later by Lal [3] in t he hap lophase . We became in te res ted in s t u d y i n g t he d e v e l o p m e n t of a p o g a m o u s sporop h y t e s f rom a haplo id s econda ry p r o t o n e m a ar is ing f(More)
The formation of the atmosphere-together with that of the oceans and sediments-was determined by three important processes: the loss of noble gases and volatiles in the solar nebula, the enrichment of these substances at the Earth's surface by exhalation from the Earth's mantle, and finally the formation of the hydrosphere, enabled by-in contrast to our(More)
Ascorbic acid is a useful ana ly t ica l r educ ing agen t capable of r educ ing several cat ions, inc luding Ag(I), Au(II I ) , Hg(II ) , Se(IV), Cu(II) , Fe(I I I ) , Co(III). I n t he p re sen t inves t iga t ion , Ag(I) is t i t r a t ed wi th ascorbic acid us ing an ion-permselec t ive electrode for po ten t iome t r i c ind ica t ion of the end point(More)
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