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| Title | Category | Date | Authors |
| Multimode electromagnetically induced transparency on a single atomic line University of Calgary | Publication | 2009-10-01 | G. Campbell, A. Ordog, A. I. Lvovsky | | Multimode electromagnetically-induced transparency on a single atomic line University of Calgary | Publication | 2009-01-01 | G. Campbell, A. Ordog, A. Lvovsky | | Polarization squeezing in atomic Rubidium vapourRecently there has been debate regarding the possibility of using polarization self-rotation (PSR) in a thermal vapour cell as a mechanism for generating a squeezed vacuum state [1,2]. It has been claimed that the squeezing produced by this method is overwhelmed by atomic noise in the thermal vapour [2]. We present a new experimental study on the possibility to generate squeezing in this system and theoretical results that highlight the importance of the atomic ground state decoherence. \newline \newline [1] J. Ries, B. Brezger and A. I. Lvovsky, Pys. Rev. A 68, 025801 (2003). \newline [2] M. T. L. Hsu, G. Hetet, A. Peng, C. C. Harb, H.-A. Bachor, M. T. Johnsson, J. J. Hope, P. K. Lam, A. Dantan, J. Cviklinski, A. Bramati and M. Pinard, Phys. Rev. A 73, 023806 (2006). University of Calgary | Presentation | 2007-06-08 | G. Campbell, C. Healey, J. Appel, K. Marzlin, A. Lvovsky | | Generation of squeezed vacuum states via polarization self-rotation University of Calgary | Publication | 2009-05-01 | G. Campbell, C. Healey, J. Appel, K. -. Marzlin | | Matched slow pulses using double electromagnetically induced transparency University of Calgary | Publication | 2008-01-01 | A. MacRae, G. Campbell, A. Lvovsky | | Simultaneous slow light pulses with matched group velocities via double-EIT University of Calgary | Publication | 2009-01-01 | A. MacRae, G. Campbell, A. Ordog, A. Lvovsky | | Giant optical nonlinearities between two matched pulsesOne of the primary limitations of nonlinear optics is that relatively high intensities are needed to produce a noticeable effect. However, in an atomic system with electromagnetically induced transparency (EIT) it is possible to observe nonlinearities at light levels as low as a few photons per atomic cross section [1]. Implementation of the EIT-based nonlinearity with pulsed light may however be challenging as it requires the interacting pulses to propagate at equal group velocities. Recently, a scheme satisfying this requirement was proposed which employs double EIT in atomic Rubidium-87 [2]. We report on our recent progress towards experimentally realizing this scheme. We have successfully demonstrated a double EIT system in which two separate pulses may be simultaneously slowed or stored. By applying a large, homogenous magnetic field across the atomic vapor, thus splitting the atomic levels, we create a large nonlinear interaction in the form of XPM. *References: [1]: H. Schmidt, and V. Imamoglu, Optics Letters 21 23 1996 [2]: Z.B. Wang, K.P. Marzlin, B.C. Sanders, Phys. Rev. Lett. 97 06, 2006 University of Calgary | Presentation | 2008-05-30 | A. MacRae, G. Campbell, Z. Wang, K. Marzlin, B. C. Sanders, A. Lvovsky | | Double electromagnetically-induced transparency in rubidium vaporWe report demonstration of double electromagnetically-induced transparency in a hot rubidium-87 vapor: two transparency windows appear simultaneously on | 5S_{1/2},F=1> to | 5P_{1/2},F=2> and |5S_{1/2},F=2> to |5P_{1/2},F=2> when a single control field is applied. We have been able to simultaneously slow down two optical pulses resonant with these transitions. By switching the control field, we have demonstrated simultaneous storage of these pulses. This scheme can be applied to achieve optical nonlinearities in the pulsed regime at light levels as low as a few photons per atomic cross section.
University of Calgary | Presentation | 2008-06-11 | A. MacRae, G. Campbell, K. Marzlin, A. Lvovsky | | Demonstration of double electromagnetically induced transparency in a hot atomic vapourWe report demonstration of double electromagnetically-induced transparency in a hot rubidium-87 vapor: two transparency windows appear simultaneously on |5S_{1/2},F=1> -> | 5P_{1/2},F=2> and $|5S_{1/2},F=2> -> | 5P_{1/2},F=2> when a single control field is applied. We have been able to simultaneously slow down two optical pulses resonant with these transitions. By switching the control field, we have demonstrated simultaneous storage of these pulses. University of Calgary | Presentation | 2008-05-30 | A. MacRae, G. Campbell, A. Lvovsky | | Double electromagnetically induced transparency in rubidium vapour University of Calgary | Presentation | 2009-08-06 | A. MacRae, G. Campbell, A. Ordog, A. Lvovsky | | Simultaneous slow light pulses with matched group velocities via double-EIT University of Calgary | Publication | 2009-05-01 | A. MacRae, G. Campbell, A. Ordog |
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