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Proceedings Paper

On the power-bandwidth trade-off in bistable photonic switches
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Paper Abstract

Low power operation and high speed have always been desirable in applications such as data processing and telecommunications. While achieving these two goals simultaneously, however, one encounters the well-known powerbandwidth trade-off. This is here discussed in a typical bistable switch based on a two-dimensional photonic crystal with Kerr type nonlinearity. The discussion is supported by the nonlinear finite difference time domain (FDTD) simulation of a direct coupled structure with a home-developed code. Two cases of working near resonant and offresonant are simulated to compare the power and the speed of the device in the two cases. It is shown that working nearresonance reduces the power levels at the expense of reducing the settling time, i.e. the bandwidth limitation. The hystersis loops for the device are also obtained with both coupled-mode theory and quasi-steady state FDTD simulation. The impact of operating near/off resonance on the shape of the hystersis loop is discussed as a confirmation of the previous results. Alternative ways of reducing the power while saving the bandwidth are also examined. The discussion is general and one may investigate other optical switches to obtain similar results.

Paper Details

Date Published: 13 February 2009
PDF: 6 pages
Proc. SPIE 7223, Photonic and Phononic Crystal Materials and Devices IX, 722308 (13 February 2009); doi: 10.1117/12.809507
Show Author Affiliations
Ali Naqavi, Sharif Univ. of Technology (Iran, Islamic Republic of)
Hooman Abediasl, Sharif Univ. of Technology (Iran, Islamic Republic of)
Khashayar Mehrany, Sharif Univ. of Technology (Iran, Islamic Republic of)
Sina Khorasani, Sharif Univ. of Technology (Iran, Islamic Republic of)
Meysam Reza Chamanzar, Georgia Institute of Technology (United States)
Ali Adibi, Georgia Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7223:
Photonic and Phononic Crystal Materials and Devices IX
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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