Cavity Quantum Optics Project:

 

We have recently started a new project headed by David Hunger in the group of Theodor W. Hänsch. We are located at the LMU and are closely related to the Max-Planck Institute of Quantum Optics in Garching.

 

 

 

Our initial goal is to perform quantum optics experiments with microscopic optical cavities.
We focus on a particularly promising design which relies on micro-machined optical fibers. Using CO2 laser pulses we create smooth concave profiles with very small radii of curvature on the endfacet of optical fibers. After coating with low loss dielectric bragg layers, they serve as mirrors of a Fabry-Perot type micro cavity. Such cavities provide an open access mode volume as small as a few wavelengths cubed, full tunability, and a Finesse on the order of 10^5.

 

We want to use and further develop such cavities as a sensitive tool to study nanoscale systems and to realize a cavity QED system with solid-state based emitters.

 

 

 

Masters Thesis

We are looking for a motivated student to join the Cavity Quantum Optics project in the group of Prof. T.W. Hänsch at the LMU Munich. ...more

 

 

 

Selected publications:

Title: Cavity-enhanced optical detection of carbon nanotube Brownian motion
Authors: S. Stapfner, L. Ost, D. Hunger, E. M. Weig, J. Reichel, I. Favero
Magazine: arXiv:1211.1608

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Title: Scaling laws of the cavity enhancement for NV centers in diamond
Authors: H. Kaupp, C. Deutsch, H.-C. Chang, J. Reichel, T. W. Hänsch, D. Hunger
Magazine: arXiv:1304.0948

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Title: Laser micro-fabrication of concave, low roughness features in silica
Authors: D. Hunger, C. Deutsch, R. J. Barbour, R. J. Warburton, J. Reichel
Magazine: AIP Advances 2, 012119 (2012)

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Title: Room-Temperature Quantum Bit Memory Exceeding One Second
Authors: P. C. Maurer, G. Kucsko, C. Latta, L. Jiang, N. Y. Yao, S. D. Bennett, F. Pastawski, D. Hunger, N. Chisholm, M. Markham, D. J. Twitchen, J. I. Cirac,
M. D. Lukin
Magazine: Science 336, 1283 (2012)

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Title: Langlebiger Quantenspeicher in Diamant
Authors: D. Hunger, F. Pastawski, C. Meier
Magazine: Physik in unserer Zeit 43 (5), 217 (2012)

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Title: Cavity nano-optomechanics: A nanomechanical system in a
high finesse optical cavity
Authors: S. Stapfner, I. Favero, D. Hunger, P. Paulitschke, J. Reichel,
K. Karrai, E. Weig
Magazine: Proc. of SPIE Vol. 772706 (2010)

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Title: A fiber Fabry-Perot cavity with high finesse
Authors: D. Hunger, T. Steinmetz, Y. Colombe, C. Deutsch, T.W. Hänsch, J. Reichel
Magazine: New Journal of Phyiscs Vol. 12 065038 (2010)

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Title: Fluctuating nanomechanical system in a high finesse optical microcavity
Authors: I. Favero, S. Stapfner, D. Hunger, P. Paulitschke, J. Reichel , H. Lorenz,
E. Weig , K. Karrai
Magazine: Optics Express Vol. 17, 12813 (2009)

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Title: Strong atom-field coupling for Bose-Einstein condensates in an

optical cavity on a chip
Authors: Y. Colombe, T. Steinmetz, G. Dubois, F. Linke, D. Hunger, J. Reichel
Magazine: Nature Vol. 450, 06331 (2007)

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Title: Stable fiber-based Fabry-Perot cavity
Authors: T. Steinmetz, Y. Colombe, D. Hunger, T.W. Hänsch, A. Balocchi,
R. Warburton, J. Reichel
Magazine: Applied Physics Letters Vol. 89, 111110 (2006)

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