@unpublished{HenkelPieplow2014,
  author    = {Henkel, Carsten and Pieplow, Gregor},
  title     = {Reply to Comment on 'Fully covariant radiation force on a polarizable particle'},
  series = {New journal of physics : the open-access journal for physics},
  volume    = {16},
  journal   = {New journal of physics : the open-access journal for physics},
  publisher = {IOP Publ. Ltd.},
  address   = {Bristol},
  issn      = {1367-2630},
  doi       = {10.1088/1367-2630/16/11/118002},
  pages     = {8},
  year      = {2014},
  abstract  = {We argue that the theories of Volokitin and Persson (2014 New J. Phys. 16 118001), Dedkov and Kyasov (2008 J. Phys.: Condens. Matter 20 354006), and Pieplow and Henkel (2013 New J. Phys. 15 023027) agree on the electromagnetic force on a small, polarizable particle that is moving parallel to a planar, macroscopic body, as far as the contribution of evanescent waves is concerned. The apparent differences are discussed in detail and explained by choices of units and integral transformations. We point out in particular the role of the Lorentz contraction in the procedure used by Volokitin and Persson, where a macroscopic body is 'diluted' to obtain the force on a small particle. Differences that appear in the contribution of propagating photons are briefly mentioned.},
  language  = {en}
}
@article{FolmanKruegerSchmiedmayeretal.2002,
  author    = {Folman, R. and Kr{\"u}ger, P. and Schmiedmayer, J{\"o}rg and Denschlag, J. H. and Henkel, Carsten},
  title     = {Microscopic atom optics : from wires to an atom chip},
  year      = {2002},
  abstract  = {We review the 10 year long journey into the miniaturization and integration of matter wave optics resulting in devices mounted on surfaces, so called atom chips. The first experiments started with the guiding of atoms with free standing wires and investigated the trapping potentials in simple geometries. Atom optical elements can now be micro fabricated down to 1 um size on atom chips. The creation of a Bose-Einstein condensate miniaturized in surface traps was recently achieved, and the first attempts to integrate light optics are in progress. In this review, we describe microscopic atom optics elements using current carrying and charged structures. Experiments with free standing structures (atom wires)are reviewed, investigating the basic principles of microscopic atom optics. We then discuss the miniaturization on the atom chip. One of the open central questions is dealt with: what happens with cold atoms close to a warm surface, how fast will they heat up or lose their coherence? The review concludes with an outlook of what we believe the future directions to be, and what can be hoped for.},
  language  = {en}
}
@article{HenkelWallisWestbrooketal.1999,
  author    = {Henkel, Carsten and Wallis, H. and Westbrook, N. and Aspect, Alain and Sengstock, K. and Ertmer, W.},
  title     = {Theory of atomic diffraction from evanescent waves},
  year      = {1999},
  abstract  = {We review recent theoretical models and experiments dealing with the diffraction of neutral atoms by a reflection grating, formed by a standing evanescent wave. We analyze diffraction mechanisms proposed for confront the theory with experiment.},
  language  = {en}
}
@article{RogobeteSchnieppSandoghdaretal.2003,
  author    = {Rogobete, Lavinia and Schniepp, H. and Sandoghdar, Vahid and Henkel, Carsten},
  title     = {Spontaneous emission in nanoscopic dielectric particles},
  issn      = {0030-3992},
  year      = {2003},
  language  = {en}
}
@phdthesis{Henkel2004,
  author    = {Henkel, Carsten},
  title     = {Coherence theory of atomic de Broglie waves and electromagnetic near fields},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-0001272},
  school      = {Universit{\"a}t Potsdam},
  year      = {2004},
  abstract  = {Die Arbeit untersucht theoretisch die Wechselwirkung neutraler Teilchen (Atome, Molek{\"u}le) mit Oberfl{\"a}chen, soweit sie durch das elektromagnetische Feld vermittelt wird. Spektrale Energiedichten und Koh{\"a}renzfunktionen werden hergeleitet und liefern eine umfassende Charakterisierung des Felds auf der sub-Wellenl{\"a}ngen-Skala. Die Ergebnisse finden auf zwei Teilgebieten Anwendung: in der integrierten Atomoptik, wo ultrakalte Atome an thermische Oberfl{\"a}chen koppeln, und in der Nahfeldoptik, wo eine Aufl{\"o}sung unterhalb der Beugungsbegrenzung mit einzelnen Molek{\"u}len als Sonden und Detektoren erzielt werden kann.},
  language  = {en}
}
@misc{HenkelSteaneKaiseretal.1994,
  author    = {Henkel, Carsten and Steane, Andrew M. and Kaiser, Robin and Dalibard, Jean},
  title     = {A modulated mirror for atomic interferometry},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42279},
  year      = {1994},
  abstract  = {A novel atomic beam splitter, using reflection of atoms off an evanescent light wave, is investigated theoretically. The intensity or frequency of the light is modulated in order to create sidebands on the reflected de Broglie wave. The weights and phases of the various sidevands are calculated using three different approaches: the Born approximation, a semiclassical path integral approach, and a numerical solution of the time-dependent Schrdinger equation. We show how this modulated mirror could be used to build practical atomic interferometers.},
  language  = {en}
}
@misc{HenkelCourtoisAspect1994,
  author    = {Henkel, Carsten and Courtois, Jean-Yves and Aspect, Alain},
  title     = {Atomic diffraction by a thin phase grating},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42269},
  year      = {1994},
  abstract  = {We present a semiclassical perturbation method for the description of atomic diffraction by a weakly modulated potential. It proceeds in a way similar to the treatment of light diffraction by a thin phase grating, and consists in calculating the atomic wavefunction by means of action integrals along the classical trajectories of the atoms in the absence of the modulated part of the potential. The capabilities and the validity condition of the method are illustrated on the well-known case of atomic diffraction by a Gaussian standing wave. We prove that in this situation the perturbation method is equivalent to the Raman-Nath approximation, and we point out that the usually-considered Raman-Nath validity condition can lead to inaccuracies in the evaluation of the phases of the diffraction amplitudes. The method is also applied to the case of an evanescent wave reflection grating, and an analytical expression for the diffraction pattern at any incidence angle is obtained for the first time. Finally, the application of the method to other situations is briefly discussed.},
  language  = {en}
}
@article{PuhlmannHenkelHeueretal.2016,
  author    = {Puhlmann, Dirk and Henkel, Carsten and Heuer, Axel and Pieplow, Gregor and Menzel, Ralf},
  title     = {Characterization of a remote optical element with bi-photons},
  series = {Physica scripta : an international journal for experimental and theoretical physics},
  volume    = {91},
  journal   = {Physica scripta : an international journal for experimental and theoretical physics},
  publisher = {IOP Publ. Ltd.},
  address   = {Bristol},
  issn      = {0031-8949},
  doi       = {10.1088/0031-8949/91/2/023006},
  pages     = {113 -- 114},
  year      = {2016},
  abstract  = {We present a simple setup that exploits the interference of entangled photon pairs. 'Signal' photons are sent through a Mach-Zehnder-like interferometer, while 'idlers' are detected in a variable polarization state. Two-photon interference (in coincidence detection) is observed with very high contrast and for significant time delays between signal and idler detection events. This is explained by quantum erasure of the polarization tag and a delayed choice protocol involving a non-local virtual polarizer. The phase of the two-photon fringes is scanned by varying the path length in the signal beam or by rotating a birefringent crystal in the idler beam. We exploit this to characterize one beam splitter of the signal photon interferometer (reflection and transmission amplitudes including losses), using only information about coincidences and control parameters in the idler path. This is possible because our bi-photon state saturates the Greenberger-Yelin-Englert inequality between contrast and predictability.},
  language  = {en}
}
@article{HannemannWegnerHenkel2021,
  author    = {Hannemann, Mandy and Wegner, Gino and Henkel, Carsten},
  title     = {No-slip boundary conditions for electron hydrodynamics and the thermal Casimir pressure},
  series = {Universe : open access journal},
  volume    = {7},
  journal   = {Universe : open access journal},
  number    = {4},
  publisher = {MDPI},
  address   = {Basel},
  issn      = {2218-1997},
  doi       = {10.3390/universe7040108},
  pages     = {20},
  year      = {2021},
  abstract  = {We derive modified reflection coefficients for electromagnetic waves in the THz and far infrared range. The idea is based on hydrodynamic boundary conditions for metallic conduction electrons. The temperature-dependent part of the Casimir pressure between metal plates is evaluated. The results should shed light on the "thermal anomaly," where measurements deviate from the standard fluctuation electrodynamics for conducting metals.},
  language  = {en}
}
@article{DikovskySokolovskyZhangetal.2009,
  author    = {Dikovsky, Valery and Sokolovsky, Vladimir and Zhang, Bin and Henkel, Carsten and Folman, Ron},
  title     = {Superconducting atom chips : advantages and challenges},
  issn      = {1434-6060},
  doi       = {10.1140/epjd/e2008-00261-5},
  year      = {2009},
  abstract  = {Superconductors are considered in view of applications to atom chip devices. The main features of magnetic traps based on superconducting wires in the Meissner and mixed states are discussed. The former state may mainly be interesting for improved atom optics, while in the latter, cold atoms may provide a probe of superconductor phenomena. The properties of a magnetic side guide based on a single superconducting strip wire placed in an external magnetic field are calculated analytically and numerically. In the mixed state of type II superconductors, inhomogeneous trapped magnetic flux, relaxation processes and noise caused by vortex motion are posing specific challenges for atom trapping.},
  language  = {en}
}