Non-trivial scaling of self-phase modulation and three-photon absorption in III-V photonic crystal waveguides
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作者:
Husko, Chad
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Thales Res & Technol, F-91767 Palaiseau, France
Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USAThales Res & Technol, F-91767 Palaiseau, France
Husko, Chad
[1
,2
]
Combrie, Sylvain
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Thales Res & Technol, F-91767 Palaiseau, FranceThales Res & Technol, F-91767 Palaiseau, France
Combrie, Sylvain
[1
]
Tran, Quynh Vy
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Thales Res & Technol, F-91767 Palaiseau, FranceThales Res & Technol, F-91767 Palaiseau, France
Tran, Quynh Vy
[1
]
Raineri, Fabrice
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CNRS, Lab Photon Nanostruct, UPR 20, F-91460 Marcoussis, France
Univ D Diderot, F-75205 Paris, FranceThales Res & Technol, F-91767 Palaiseau, France
Raineri, Fabrice
[3
,4
]
Wong, Chee Wei
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Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USAThales Res & Technol, F-91767 Palaiseau, France
Wong, Chee Wei
[2
]
De Rossi, Alfredo
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Thales Res & Technol, F-91767 Palaiseau, FranceThales Res & Technol, F-91767 Palaiseau, France
De Rossi, Alfredo
[1
]
机构:
[1] Thales Res & Technol, F-91767 Palaiseau, France
[2] Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA
[3] CNRS, Lab Photon Nanostruct, UPR 20, F-91460 Marcoussis, France
We investigate the nonlinear response of photonic crystal waveguides with suppressed two-photon absorption. A moderate decrease of the group velocity (similar to c/6 to c/15, a factor of 2.5) results in a dramatic (x 30) enhancement of three-photon absorption well beyond the expected scaling, proportional to 1/v(g)(3). This non-trivial scaling of the effective nonlinear coefficients results from pulse compression, which further enhances the optical field beyond that of purely slow-group velocity interactions. These observations are enabled in mm-long slow-light photonic crystal waveguides owing to the strong anomalous group-velocity dispersion and positive chirp. Our numerical physical model matches measurements remarkably. (C) 2009 Optical Society of America