Title

Picosecond Pump-Probe Measurement Of Bandgap Changes In Sio 2/Tio2 One-Dimensional Photonic Bandgap Structures

Abstract

A picosecond pump-probe nonlinear optical measurement is performed in SiO2/TiO2 one-dimensional photonic bandgap structures fabricated by a solgel method. Both high and low band edges were examined by varying the probe wavelengths and angle tuning was also employed to further clarify the mechanism of a nonlinear optical response. The third-order nonlinear optical response in one-dimensional photonic bandgap structures that comprise TiO2 films is responsible for the nonlinear optical transmissions at both bandgap edges, with an 8% decrease at the low-energy edge and a 4.5% increase at the high-energy edge for a 355 nm pump intensity of 430 MW/cm 2. © 2006 Optical Society of America.

Publication Date

2-1-2006

Publication Title

Optics Letters

Volume

31

Issue

3

Number of Pages

377-379

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OL.31.000377

Socpus ID

33645097587 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33645097587

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