Ultrafast nonlinear tuning of trhe reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption

AD Bristow; DO Kundys; AZ Garcia-Deniz; JPR Wells; AM Fox; MS Skolnick; DM Whittaker; A Tahraoui; Thomas Fraser Krauss; JS Roberts

doi:10.1063/1.1790569

Ultrafast nonlinear tuning of trhe reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption

AD Bristow, DO Kundys, AZ Garcia-Deniz, JPR Wells, AM Fox, MS Skolnick, DM Whittaker, A Tahraoui, Thomas Fraser Krauss, JS Roberts

Research output: Contribution to journal › Article › peer-review

Abstract

We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the semiconductor core of the photonic lattice. A free-carrier model is used to simulate the phenomenon, giving values of the change in refractive index per unit carrier density that satisfactorily compare to values calculated for bulk AlGaAs under similar conditions. Time-resolved spectra are also presented, showing relaxation times of <10 ps which are consistent with surface recombination times in the patterned waveguide. (C) 2004 American Institute of Physics.

Original language	English
Pages (from-to)	4729-4734
Number of pages	6
Journal	Journal of Applied Physics
Volume	96
DOIs	https://doi.org/10.1063/1.1790569
Publication status	Published - 1 Nov 2004

Keywords

BAND-GAP MATERIALS
ULTRASHORT PULSES
GENERATION
INDEX
LIGHT
LASER

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10.1063/1.1790569

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title = "Ultrafast nonlinear tuning of trhe reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption",

abstract = "We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the semiconductor core of the photonic lattice. A free-carrier model is used to simulate the phenomenon, giving values of the change in refractive index per unit carrier density that satisfactorily compare to values calculated for bulk AlGaAs under similar conditions. Time-resolved spectra are also presented, showing relaxation times of <10 ps which are consistent with surface recombination times in the patterned waveguide. (C) 2004 American Institute of Physics.",

keywords = "BAND-GAP MATERIALS, ULTRASHORT PULSES, GENERATION, INDEX, LIGHT, LASER",

author = "AD Bristow and DO Kundys and AZ Garcia-Deniz and JPR Wells and AM Fox and MS Skolnick and DM Whittaker and A Tahraoui and Krauss, {Thomas Fraser} and JS Roberts",

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T1 - Ultrafast nonlinear tuning of trhe reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption

AU - Bristow, AD

AU - Kundys, DO

AU - Garcia-Deniz, AZ

AU - Wells, JPR

AU - Fox, AM

AU - Skolnick, MS

AU - Whittaker, DM

AU - Tahraoui, A

AU - Krauss, Thomas Fraser

AU - Roberts, JS

PY - 2004/11/1

Y1 - 2004/11/1

N2 - We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the semiconductor core of the photonic lattice. A free-carrier model is used to simulate the phenomenon, giving values of the change in refractive index per unit carrier density that satisfactorily compare to values calculated for bulk AlGaAs under similar conditions. Time-resolved spectra are also presented, showing relaxation times of <10 ps which are consistent with surface recombination times in the patterned waveguide. (C) 2004 American Institute of Physics.

AB - We have studied the power-dependent wavelength shift of photonic coupling resonances of a two-dimensional photonic crystal waveguide by reflection geometry pump-probe measurements. The quadratic response is indicative of two-photon induced carrier creation, which alters the refractive index of the semiconductor core of the photonic lattice. A free-carrier model is used to simulate the phenomenon, giving values of the change in refractive index per unit carrier density that satisfactorily compare to values calculated for bulk AlGaAs under similar conditions. Time-resolved spectra are also presented, showing relaxation times of <10 ps which are consistent with surface recombination times in the patterned waveguide. (C) 2004 American Institute of Physics.

KW - BAND-GAP MATERIALS

KW - ULTRASHORT PULSES

KW - GENERATION

KW - INDEX

KW - LIGHT

KW - LASER

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U2 - 10.1063/1.1790569

DO - 10.1063/1.1790569

M3 - Article

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EP - 4734

JO - Journal of Applied Physics

JF - Journal of Applied Physics

ER -

Ultrafast nonlinear tuning of trhe reflection properties of AlGaAs photonic crystal waveguides by two-photon absorption

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Keywords

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