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Opt Lett. 2009 Nov 1;34(21):3310-2. doi: 10.1364/OL.34.003310.

Optical memory based on ultrafast wavelength switching in a bistable microlaser.

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  • 1Theoretical Nano-Photonics Group, Institute of High-Frequency and Communication Technology, Faculty of Electrical, Information, and Media Engineering, University of Wuppertal, Rainer-Gruenter-Strasse 21, D-42119 Wuppertal, Germany.


We propose an optical memory cell based on ultrafast wavelength switching in coupled-cavity microlasers, featuring bistability between modes separated by several nanometers. A numerical implementation is demonstrated by simulating a two-dimensional photonic crystal microlaser. Switching times of less than 10 ps, switching energy around 15-30 fJ, and on-off contrast of more than 40 dB are achieved. Theoretical guidelines for optimizing the performance of the memory cell in terms of switching time and energy are drawn.

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