All-optical octave-broad ultrafast switching of Si woodpile photonic band gap crystals
arXiv:physics/0603045 · doi:10.1103/PhysRevB.77.115214
Abstract
We present ultrafast all-optical switching measurements of Si woodpile photonic band gap crystals. The crystals are spatially homogeneously excited, and probed by measuring reflectivity over an octave in frequency (including the telecom range) as a function of time. After 300 fs, the complete stop band has shifted to higher frequencies as a result of optically excited free carriers. The switched state relaxes quickly with a time constant of 18 ps. We present a quantitative analysis of switched spectra with theory for finite photonic crystals. The induced changes in refractive index are well described by a Drude model with a carrier relaxation time of 10 fs. We briefly discuss possible applications of high-repetition rate switching of photonic crystal cavities.
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- Stopping Light All-Optically
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- Spatial homogeneity of optically switched semiconductor photonic crystals and of bulk semiconductors
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- Identification of competing ultrafast all-optical switching mechanisms in Si woodpile photonic crystals
- Experimental probe of a complete 3D photonic band gap
- Kerr and free-carrier ultrafast all-optical switching of GaAs/AlAs nanostructures near the three-photon edge of GaAs
- Reflectivity of Finite 3D GaAs Photonic Band Gap Crystals
- Competition between loss channels in quantum-dot cavity systems: unconventional consequences
- Broadband sensitive pump-probe setup for ultrafast optical switching of photonic nanostructures and semiconductors
- Ultrafast dephasing of light in strongly scattering GaP nanowires
- Generation of ultrashort (~10ps) spontaneous emission pulses by quantum dots in a switched optical microcavity
- Instantaneous modulations in time-varying complex optical potentials
- Time-resolved resonance and linewidth of an ultrafast switched GaAs/AlAs microcavity