Title

Cascading Of Second-Order Processes In Quadratic Molecular Media At The Origin Of Very Large Cubic Effects

Keywords

Quadratic molecular media; Second-order processes

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. © 1994.

Publication Date

1-1-1994

Publication Title

Synthetic Metals

Volume

67

Issue

1-3

Number of Pages

303-307

Document Type

Article

Identifier

scopus

Personal Identifier

scopus

DOI Link

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

Socpus ID

0028545466 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0028545466

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