Slow and fast light switching in ruby

Rajitha Papukutty Rajan; Hans Riesen

doi:10.1117/12.2182363

18 May 2015 Slow and fast light switching in ruby

Rajitha Papukutty Rajan, Hans Riesen

Proceedings Volume 9503, Nonlinear Optics and Applications IX; 95030C (2015) https://doi.org/10.1117/12.2182363
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

Studies about light propagation have been undertaken for more than a century. It is now well established that any material that has normal or anomalous dispersion generates slow or fast light. In this paper, we demonstrate an experimental technique to rapidly switch between slow and fast light in ruby. The experiment utilizes transient holeburning to create drastic variation in refractive index of ruby to produce slow as well as fast light. Transient hole-burning involves the depletion of the ground state leading to a highly populated excited state by single frequency laser excitation. This leads to a hole in the absorption spectrum when readout by a laser. We observed a delay of 29 ns and advancement of -11 ns in an external magnetic field of B║c = 12 mT corresponding to a group velocity of c/961 and negative group velocity of –c/365 respectively.

Citation Download Citation

Rajitha Papukutty Rajan and Hans Riesen "Slow and fast light switching in ruby", Proc. SPIE 9503, Nonlinear Optics and Applications IX, 95030C (18 May 2015); https://doi.org/10.1117/12.2182363

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