Large nonlinear phase shifts in low-loss AlxGa1- xAs waveguides near half-gap

S. T. Ho; C. E. Soccolich; M. N. Islam; W. S. Hobson; A. F J Levi; R. E. Slusher

doi:10.1063/1.105952

Large nonlinear phase shifts in low-loss Al_xGa_1- _xAs waveguides near half-gap

S. T. Ho^*, C. E. Soccolich, M. N. Islam, W. S. Hobson, A. F J Levi, R. E. Slusher

^*Corresponding author for this work

Electrical and Computer Engineering

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

53 Scopus citations

Abstract

We study the instantaneous nonlinear index change in Al _0.2Ga_0.8As waveguides below the two-photon absorption edge and find π phase shifts with 80 pJ, 0.4 ps pulses at wavelengths near 1.6 μm. These large phase shifts are obtained with less than 1 dB of loss from multiphoton absorption. Our results indicate that AlGaAs waveguides, which have a mature fabrication technology, can be used as compact nonlinear elements in switching and quantum optics applications in the near-infrared. Further optimization of the waveguide geometry should result in useful nonlinear phase shifts and low losses for pulse energies approaching a picojoule.

Original language	English (US)
Pages (from-to)	2558-2560
Number of pages	3
Journal	Applied Physics Letters
Volume	59
Issue number	20
DOIs	https://doi.org/10.1063/1.105952
State	Published - 1991

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Large nonlinear phase shifts in low-loss AlxGa1- xAs waveguides near half-gap",

abstract = "We study the instantaneous nonlinear index change in Al 0.2Ga0.8As waveguides below the two-photon absorption edge and find π phase shifts with 80 pJ, 0.4 ps pulses at wavelengths near 1.6 μm. These large phase shifts are obtained with less than 1 dB of loss from multiphoton absorption. Our results indicate that AlGaAs waveguides, which have a mature fabrication technology, can be used as compact nonlinear elements in switching and quantum optics applications in the near-infrared. Further optimization of the waveguide geometry should result in useful nonlinear phase shifts and low losses for pulse energies approaching a picojoule.",

author = "Ho, {S. T.} and Soccolich, {C. E.} and Islam, {M. N.} and Hobson, {W. S.} and Levi, {A. F J} and Slusher, {R. E.}",

year = "1991",

doi = "10.1063/1.105952",

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T1 - Large nonlinear phase shifts in low-loss AlxGa1- xAs waveguides near half-gap

AU - Ho, S. T.

AU - Soccolich, C. E.

AU - Islam, M. N.

AU - Hobson, W. S.

AU - Levi, A. F J

AU - Slusher, R. E.

PY - 1991

Y1 - 1991

N2 - We study the instantaneous nonlinear index change in Al 0.2Ga0.8As waveguides below the two-photon absorption edge and find π phase shifts with 80 pJ, 0.4 ps pulses at wavelengths near 1.6 μm. These large phase shifts are obtained with less than 1 dB of loss from multiphoton absorption. Our results indicate that AlGaAs waveguides, which have a mature fabrication technology, can be used as compact nonlinear elements in switching and quantum optics applications in the near-infrared. Further optimization of the waveguide geometry should result in useful nonlinear phase shifts and low losses for pulse energies approaching a picojoule.

AB - We study the instantaneous nonlinear index change in Al 0.2Ga0.8As waveguides below the two-photon absorption edge and find π phase shifts with 80 pJ, 0.4 ps pulses at wavelengths near 1.6 μm. These large phase shifts are obtained with less than 1 dB of loss from multiphoton absorption. Our results indicate that AlGaAs waveguides, which have a mature fabrication technology, can be used as compact nonlinear elements in switching and quantum optics applications in the near-infrared. Further optimization of the waveguide geometry should result in useful nonlinear phase shifts and low losses for pulse energies approaching a picojoule.

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