Picosecond pump-probe measurement of bandgap changes in SiO 2/TiO2 one-dimensional photonic bandgap structures

Jisoo Hwang, Min Jung Kim, J. W. Wu, Seung Mook Lee, Bum Ku Rhee

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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.

Original languageEnglish
Pages (from-to)377-379
Number of pages3
JournalOptics Letters
Volume31
Issue number3
DOIs
StatePublished - 1 Feb 2006

Fingerprint

Dive into the research topics of 'Picosecond pump-probe measurement of bandgap changes in SiO 2/TiO2 one-dimensional photonic bandgap structures'. Together they form a unique fingerprint.

Cite this