Auflistung nach Schlagwort "Photons"

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  • Medical prototyping using two photon polymerization 
    Narayan, Roger J.; Doraiswamy, Anand; Chrisey, Douglas B.; Chichkov, Boris (Amsterdam : Elsevier Science, 2010)
    Two photon polymerization involves nearly simultaneous absorption of ultrashort laser pulses for selective curing of photosensitive material. This process has recently been used to create small-scale medical devices out ...
  • Micro-optical Realization of Arrays of Selectively Addressable Dipole Traps: A Scalable Configuration for Quantum Computation with Atomic Qubits 
    Dumke, R.; Volk, M.; Müther, T.; Buchkremer, F.B.J.; Birkl, G.; Ertmer, Wolfgang (American Physical Society, 2002)
    We experimentally demonstrate novel structures for the realization of registers of atomic qubits: We trap neutral atoms in one- and two-dimensional arrays of far-detuned dipole traps obtained by focusing a red-detuned laser ...
  • Molecular switching in iron complexes bridged via tin-cyanides observed by Mössbauer and ESR spectroscopy 
    Jung, S.; Renz, Franz; Klein, M.; Menzel, M.; Boča, R.; Stößer, R. (Bristol : IOP Publishing Ltd., 2010)
    The precursor [FeIII(L)Cl] (LH2 N,N'-bis(2'-hydroxy- 3'-X-benzyliden)-1,6-diamino-3-N-hexane) is a high-spin (S 5/2) complex (with X -CH3, -O-CH3). This precursor is combined with the bridging unit [SnIV(CN)4] to yield ...
  • Nanofabrication of High-Resolution Periodic Structures with a Gap Size Below 100 nm by Two-Photon Polymerization 
    Zheng, Lei; Kurselis, Kestutis; El-Tamer, Ayman; Hinze, Ulf; Reinhardt, Carsten; Overmeyer, Ludger; Chichkov, Boris (New York : Springer New York LLC, 2019)
    In this paper, approaches for the realization of high-resolution periodic structures with gap sizes at sub-100 nm scale by two-photon polymerization (2PP) are presented. The impact of laser intensity on the feature sizes ...
  • Numerical analysis of the ultra-wide tunability of nanofiber Bragg cavities 
    Takashima, Hideaki; Schell, Andreas W.; Takeuchi, Shigeki (Washington, DC : Optica, 2023)
    Nanofiber Bragg cavities (NFBCs) are solid-state microcavities fabricated in optical tapered fiber. They can be tuned to a resonance wavelength of more than 20 nm by applying mechanical tension. This property is important ...
  • On the origin of photon mass, momentum, and energy in a dielectric medium [Invited] 
    Chichkov, Nikolai B.; Chichkov, Boris N. (Washington, DC : Optica, 2021)
    The debate and controversy concerning the momentum of light in a dielectric medium (Abraham vs Minkowski) is well-known and still not fully resolved. In this paper, we investigate the origin of both momenta in the frame ...
  • Photoelectron circular dichroism of chiral molecules studied with a continuum-state-corrected strong-field approximation 
    Dreissigacker, Ingo; Lein, Manfred (College Park, MD : American Physical Society, 2014)
    Motivated by recent experiments on circular dichroism in the photoelectron momentum distributions from strong-field ionization of chiral molecules [C. Lux, Angew. Chem. Int. Ed. 51, 5001 (2012)1433-785110.1002/anie.201109035; ...
  • Physical and chemical induced spin crossover 
    Renz, Franz (Bristol : IOP Publishing Ltd., 2010)
    Physical spin crossover (spin transition), one of the most fascinating dynamic electronic structure phenomena occurring in coordination compounds of third row transition metal ions, mostly of iron(II), iron(III) and ...
  • Precision Isotope Shift Measurements in Calcium Ions Using Quantum Logic Detection Schemes 
    Gebert, Florian; Wan, Yong; Wolf, Fabian; Angstmann, Christopher N.; Berengut, Julian C.; Schmidt, Piet O. (College Park, MD : American Physical Society, 2015)
    We demonstrate an efficient high-precision optical spectroscopy technique for single trapped ions with nonclosed transitions. In a double-shelving technique, the absorption of a single photon is first amplified to several ...
  • Roadmap on STIRAP applications 
    Bergmann, Klaas; Nägerl, Hanns-Christoph; Panda, Cristian; Gabrielse, Gerald; Miloglyadov, Eduard; Quack, Martin; Seyfang, Georg; Wichmann, Gunther; Ospelkaus, Silke; Kuhn, Axel; Longhi, Stefano; Szameit, Alexander; Pirro, Philipp; Hillebrands, Burkard; Zhu, Xue-Feng; Zhu, Jie; Drewsen, Michael; Hensinger, Winfried K.; Weidt, Sebastian; Halfmann, Thomas; Wang, Hai-Lin; Paraoanu, Gheorghe Sorin; Vitanov, Nikolay V.; Mompart, Jordi; Busch, Thomas; Barnum, Timothy J.; Grimes, David D.; Field, Robert W.; Raizen, Mark G.; Narevicius, Edvardas; Auzinsh, Marcis; Budker, Dmitry; Pálffy, Adriana; Keitel, Christoph H. (Bristol : Institute of Physics Publishing, 2019)
    STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly interesting feature ...
  • Semiclassical two-step model for strong-field ionization 
    Shvetsov-Shilovski, N.I.; Lein, Manfred; Madsen, L.B.; Räsänen, E.; Lemell, C.; Burgdörfer, J.; Arbó, D.G.; Tokési, K. (College Park, MD : American Physical Society, 2016)
    We present a semiclassical two-step model for strong-field ionization that accounts for path interferences of tunnel-ionized electrons in the ionic potential beyond perturbation theory. Within the framework of a classical ...
  • Single photon emission from ODT passivated near-surface GaAs quantum dots 
    Cao, Xin; Yang, Jingzhong; Li, Pengji; Zhang, Yiteng; Rugeramigabo, Eddy P.; Brechtken, Benedikt; Haug, Rolf J.; Zopf, Michael; Ding, Fei (Melville, NY : American Inst. of Physics, 2021)
    Epitaxially grown semiconductor quantum dots are promising candidates for pure single photon and polarization-entangled photon pair emission. Excellent optical properties can typically be ensured only if these so-called ...
  • Spectral Hong–Ou–Mandel Interference between Independently Generated Single Photons for Scalable Frequency-Domain Quantum Processing 
    Khodadad Kashi, Anahita; Kues, Michael (Weinheim : Wiley VCH, 2021)
    The photon's frequency degree of freedom, being compatible with mature telecom infrastructure, offers large potential for the stable and controllable realization of photonic quantum processing applications such as the ...
  • The TRAPSENSOR facility: An open-ring 7 tesla Penning trap for laser-based precision experiments 
    Gutiérrez, Manuel J.; Berrocal, Joaquín; Cornejo, Juan M.; Domínguez, Francisco; Del Pozo, Jesús J.; Arrazola, Iñigo; Bañuelos, Javier; Escobedo, Pablo; Kaleja, Oliver; Lamata, Lucas; Rica, Raúl A.; Schmidt, Stefan; Block, Michael; Solano, Enrique; Rodríguez, Daniel (Bristol : Institute of Physics Publishing, 2019)
    A Penning-trap facility for high-precision mass spectrometry based on a novel detection method has been built. This method consists in measuring motional frequencies of singly-charged ions trapped in strong magnetic fields ...
  • Theory of Subcycle Linear Momentum Transfer in Strong-Field Tunneling Ionization 
    Ni, Hongcheng; Brennecke, Simon; Gao, Xiang.; He, Pei-Lun; Donsa, Stefan; Březinová, Iva; He, Feng; Wu, Jian; Lein, Manfred; Tong, Xiao-Min; Burgdörfer, Joachim (College Park, MD : American Physical Society, 2020)
    Interaction of a strong laser pulse with matter transfers not only energy but also linear momentum of the photons. Recent experimental advances have made it possible to detect the small amount of linear momentum delivered ...
  • Three-beam atom interferometer 
    Hinderthür, H.; Pautz, A.; Rieger, V.; Ruschewitz, F.; Peng, J.L.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1997)
    We present an atom interferometer based on the interference of three partial matter waves in three different internal and external states. Coherent laser excitation acts as a beamsplitter to create a superposition state ...
  • Two-photon optical shielding of collisions between ultracold polar molecules 
    Karam, Charbel; Vexiau, Romain; Bouloufa-Maafa, Nadia; Dulieu, Olivier; Lepers, Maxence; Borgloh, Mara Meyer zum Alten; Ospelkaus, Silke; Karpa, Leon (College Park, MD : APS, 2023)
    We propose a method to engineer repulsive long-range interactions between ultracold ground-state molecules using optical fields, thus preventing short-range collisional losses. It maps the microwave coupling recently used ...
  • Unraveling Two-Photon Entanglement via the Squeezing Spectrum of Light Traveling through Nanofiber-Coupled Atoms 
    Hinney, Jakob; Prasad, Adarsh S.; Mahmoodian, Sahand; Hammerer, Klemens; Rauschenbeutel, Arno; Schneeweiss, Philipp; Volz, Jürgen; Schemmer, Max (College Park, Md. : APS, 2021)
    We observe that a weak guided light field transmitted through an ensemble of atoms coupled to an optical nanofiber exhibits quadrature squeezing. From the measured squeezing spectrum we gain direct access to the phase and ...
  • Wave packet echoes in the motion of trapped atoms 
    Buchkremer, F.B.J.; Dumke, R.; Levsen, H.; Birkl, G.; Ertmer, Wolfgang (American Physical Society, 2000)
    A new echo technique to access the coherent and dissipative dynamics of atomic wave packet oscillations in trapping potentials was experimentally and systematically validated. By using this technique, the coherence time ...