CAJ | 학술논문

采用电吸收谱(EA)的方法研究了在电场作用下,CdS0.1Se0.9纳米晶体光学性质的变化.分析了电场效应的物理机制,电场效应是使纳米晶体的吸收谱展宽和移动.第一激发态对外加电场敏感,而其它激发态不敏感.从电吸收谱上得到电光响应信号幅度与外加电场场强的平方成正比,表明纳米晶体的电光效应是Kerr效应,具有三阶非线性极化率χ(3).
채용전흡수보(EA)적방법연구료재전장작용하,CdS0.1Se0.9납미정체광학성질적변화.분석료전장효응적물리궤제,전장효응시사납미정체적흡수보전관화이동.제일격발태대외가전장민감,이기타격발태불민감.종전흡수보상득도전광향응신호폭도여외가전장장강적평방성정비,표명납미정체적전광효응시Kerr효응,구유삼계비선성겁화솔χ(3).
The changes of optical properties of CdS0.1Se0.9 nanocrystals in presence of externalfield are investigated using electro-absorption (EA) spectra.The effect of the electric field is discussed.This electric field induces absorption spectrum of nanocrystals broaden and red shifted.The first excited state is very sensitive to the external field.The signal magnitude of EA scales is proportional to the square of applied field.It indicates that the electro-optic effect of CdS0.1Se0.9 nanocrystals is Kerr effect and the nanocrystals have the third order nonlinear optical polarizability χ(3).