Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects

P. Vidakovic; J. Zyss; D. Kim; W. Toruellas; G. Stegeman; W. E. Moerner; R. Twieg; G. Bjorklund

doi:10.1016/0379-6779(94)90061-2

Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects

P. Vidakovic, J. Zyss, D. Kim, W. Toruellas, G. Stegeman, W. E. Moerner, R. Twieg, G. Bjorklund

Department of Physics

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Abstract

We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n₂ values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10^-12 cm²/W at relatively modest input intensities from 30 to 60 MW/cm². The cascading origin of large n₂ values was fully confirmed by z-scan measurements performed on a single DAN crystal.

Original language	English
Pages (from-to)	303-307
Number of pages	5
Journal	Synthetic Metals
Volume	67
Issue number	1-3
DOIs	https://doi.org/10.1016/0379-6779(94)90061-2
Publication status	Published - 1994 Nov

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(94)90061-2

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title = "Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects",

abstract = "We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n2 values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10-12 cm2/W at relatively modest input intensities from 30 to 60 MW/cm2. The cascading origin of large n2 values was fully confirmed by z-scan measurements performed on a single DAN crystal.",

author = "P. Vidakovic and J. Zyss and D. Kim and W. Toruellas and G. Stegeman and Moerner, {W. E.} and R. Twieg and G. Bjorklund",

year = "1994",

month = nov,

doi = "10.1016/0379-6779(94)90061-2",

language = "English",

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pages = "303--307",

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TY - JOUR

T1 - Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects

AU - Vidakovic, P.

AU - Zyss, J.

AU - Kim, D.

AU - Toruellas, W.

AU - Stegeman, G.

AU - Moerner, W. E.

AU - Twieg, R.

AU - Bjorklund, G.

PY - 1994/11

Y1 - 1994/11

N2 - We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n2 values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10-12 cm2/W at relatively modest input intensities from 30 to 60 MW/cm2. The cascading origin of large n2 values was fully confirmed by z-scan measurements performed on a single DAN crystal.

AB - We have shown that very large nonlinear shifts ranging from π/4 to π/2 observed at relatively modest input intensities in single-crystal cored fibers of 4-(N,N-dimethylamino)-3-acetamidonitrobenzene (DAN) have their origin in the cascading of two second-order nonlinear processes: second-harmonic generation followed by down-frequency conversion. The nonlinear shifts and corresponding n2 values extracted from independent observationsof self-phase modulation and direct interferometric measurements are as large as 10-12 cm2/W at relatively modest input intensities from 30 to 60 MW/cm2. The cascading origin of large n2 values was fully confirmed by z-scan measurements performed on a single DAN crystal.

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JO - Synthetic Metals

JF - Synthetic Metals

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ER -

Cascading of second-order processes in quadratic molecular media at the origin of very large cubic effects

Abstract

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