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Observation of femtojoule optical bistability involving Fano resonances in high-Q/Vm silicon photonic crystal nanocavities

Appl. Phys. Lett. 91, 051113 (2007); doi:10.1063/1.2757607

Published 31 July 2007

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Xiaodong Yang, Chad Husko, and Chee Wei Wong
Optical Nanostructures Laboratory, Columbia University, New York, New York 10027

Mingbin Yu and Dim-Lee Kwong
The Institute of Microelectronics, 11 Science Park Road, Singapore 117685, Singapore
The authors observe experimentally optical bistability enhanced through Fano interferences in high-Q localized silicon photonic crystal resonances (Q~30  000 and modal volume ~0.98 cubic wavelengths). This phenomenon is analyzed through nonlinear coupled-mode formalism, including the interplay of chi(3) effects such as two-photon absorption and related free-carrier dynamics, and optical Kerr as well as thermal effects and linear losses. Experimental and theoretical results demonstrate Fano resonance based bistable states with switching thresholds of 185  µW and 4.5  fJ internally stored cavity energy (~540  fJ consumed energy) in silicon for scalable optical buffering and logic. ©2007 American Institute of Physics
History: Received 12 March 2007; accepted 21 June 2007; published 31 July 2007
Permalink: http://link.aip.org/link/?APPLAB/91/051113/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.65.An
    Nonlinear optical susceptibility, hyperpolarizability
  • 42.65.Pc
    Optical bistability, multistability, and switching, including local field effects
  • 42.65.Hw
    Optical phase conjugation; photorefractive and Kerr effects
  • 42.70.Qs
    Photonic bandgap materials
  • 42.82.Et
    Optical waveguides, couplers, and arrays (integrated optics)
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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