Results 51 to 60 of about 321,428 (283)

A high-rate source for single photons in a pure quantum state

New Journal of Physics, 2013
We report on the efficient generation of single photons, making use of spontaneous Raman scattering in a single trapped ion. The photons are collected through in-vacuum high-numerical-aperture objectives. Photon frequency, polarization and temporal shape
C Kurz, J Huwer, M Schug, P Müller, J Eschner   +4 more
doaj   +1 more source

Eigenstates of a Small Josephson Junction Coupled to a Resonant Cavity

, 2001
We carry out a quantum-mechanical analysis of a small Josephson junction coupled to a single-mode resonant cavity. We find that the eigenstates of the combined junction-cavity system are strongly entangled only when the gate voltage applied at one of the
A. B. Cawthorne, A. O. Caldeira, A. Shnirman, A. Steane, C. H. van der Wal, D. Stroud, E. Almaas, G. Filatrella, J. E. Mooij, J. H. Eberly, J. K. Harbaugh, J. R. Friedman, L. A. Lugiato, M. J. Everitt, M. V. Feigel’man, P. Barbara, R. Bonifacio, S. Chakravarty, S. Haroche, V. Ambegaokar, V. Bouchiat, W. A. Al-Saidi, Y. Nakamura, Y. Nakamura   +23 more
core   +1 more source

Perfect excitation of a matter qubit by a single photon in free space [PDF]

, 2009
We propose a scheme for perfect excitation of a single two-level atom by a single photon in free space. The photon state has to match the time reversed photon state originating from spontaneous decay of a two-level system.
Alber, Gernot, Leuchs, Gerd, Stobińska, Magdalena   +2 more
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Ultrafast supercontinuum spectroscopy of carrier multiplication and biexcitonic effects in excited states of PbS quantum dots

, 2011
We examine the multiple exciton population dynamics in PbS quantum dots by ultrafast spectrally-resolved supercontinuum transient absorption (SC-TA). We simultaneously probe the first three excitonic transitions over a broad spectral range.
Andreev A. D., Beard M. C., Beard M. C., Beard M. C., Beard M. C., Bose R., Bose R., C. B. Murray, C. W. Wong, Cademartiri L., Cho B., Efros A. L., Ellingson R. J., F. Gesuele, Franceschetti A., Henry E. R., Ji M., Kambhampati P., Kang I., Klimov V. I., Klimov V. I., Klimov V. I., Liljeroth P., Luther J. M., M. Y. Sfeir, McGuire J. A., McGuire J. A., Moreels I., Murray C. B., Nair G., Nootz G., Nozik A. J., Nozik A. J., Peterson J. J., Pijpers J. J. H., Piryatinski A., Rabani E., Sambur J. B., Schaller R. D., Schaller R. D., Schaller R. D., Schins J. M., Sfeir M. Y., Shaller R. D., Shockley W., Sukhovatkin V., Sykora M., T. F. Heinz, Timmerman D., Trinh M. T., Trinh M. T., W.-K. Koh, Wehrenberg B. L.   +52 more
core   +1 more source

All-Optical Modulation in a Silicon Waveguide Based on a Single-Photon Process [PDF]

, 2008
All-optical, low-power modulation is a major goal in photonics. Because of their high mode-field concentration and ease of manufacturing, nanoscale silicon waveguides offer an intriguing platform for photonics.
Baehr-Jones, Tom, Hochberg, Michael, Scherer, Axel   +2 more
core   +1 more source

Enhanced Gamma Radiation Shielding Using Epoxy Quartz Fabric Composites Reinforced With CoCl2 Microparticles

Advanced Engineering Materials, EarlyView.
The growing demand for lightweight, nontoxic, and multifunctional gamma shielding materials has intensified efforts to find alternatives to conventional lead and aluminum‐based protectants. In this work, we develop epoxy quartz fabric composites reinforced with cobalt chloride (CoCl2) microparticles, fabricated via hand lay‐up with varying filler ...
Summan Urooge, Ahsan Irshad, Umar Jamil, Srosh Fazil, Khuram Liaqat, Kashif Shahzad, Fakhar Alam, Mehboob Alam   +7 more
wiley   +1 more source

Undistorted 3D microstructures in SU8 formed through two-photon polymerization

AIP Advances, 2011
This paper presents the wavelength dependence of two-photon polymerization in SU-8 between 720-780 nm. The study is performed by microstructuring SU-8 through a single-shot exposure of SU-8 to 140 fs tunable laser pulses with 80 MHz repetition rate, or ...
Kris Ohlinger, Yuankun Lin, Zsolt Poole, Kevin P. Chen   +3 more
doaj   +1 more source

Evidence of polariton induced transparency in a single organic quantum wire

, 2005
The resonant interaction between quasi-one dimensional excitons and photons is investigated. For a single isolated organic quantum wire, embedded in its single crystal monomer matrix, the strong exciton-photon coupling regime is reached.
F. Dubin, G. Weiser, J. Berréhar, M. Schott, R. Grousson, V. Voliotis   +5 more
core   +2 more sources

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source