Second-harmonic generation from silicon nanocrystals embedded in SiO/sub 2/

Author

Jiang, Y. ; Wilson, P.T. ; Downer, M.C. ; White, C.W. ; Withrow, S.P.

Author_Institution

Dept. of Phys., Texas Univ., Austin, TX, USA

fYear

2001

fDate

11-11 May 2001

Firstpage

552

Lastpage

553

Abstract

Summary form only given. Si nanocrystals (ncs) embedded in SiO/sub 2/ are an essential ingredient of a new class of flash memory devices, and show promise as a nonlinear optical material for photonic device applications. We report an optical second-harmonic generation (SHG) study of nc-Si/SiO/sub 2/ nanocomposites. The results show that SHG from nc-Si/SiO/sub 2/ is sensitive to Si/SiO/sub 2/ electronic interface states and to electrostatic charging of the Si ncs, both essential features in their role in electronic device operation. SHG is also sensitive to transverse gradients in nc density, an essential feature in the design of photonic structures. Thus SHG uniquely characterizes materials and devices based on nc-Si/SiO/sub 2/.

Keywords

elemental semiconductors; interface states; nanostructured materials; optical harmonic generation; refractive index; semiconductor quantum dots; silicon; SHG coherence lengths; Si-SiO/sub 2/; absorption spectra; annealing; discrete boundaries; electronic interface states; electrostatic charging; fused silica substrates; multi-photon process; nanocomposites; nonlinear optical material; optical second-harmonic generation; phase mismatch; photo-induced rise; refractive index dispersion; silica embedded silicon nanocrystals; time-dependent SHG effect; transverse density gradients; Flash memory; Interface states; Nanocomposites; Nanocrystals; Nonlinear optical devices; Nonlinear optics; Optical harmonic generation; Optical materials; Optical sensors; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on

Conference_Location

Baltimore, MD, USA

Print_ISBN

1-55752-662-1

Type

conf

DOI

10.1109/CLEO.2001.948156

Filename

948156