飞秒
饱和吸收
吸收(声学)
非线性光学
折射
衰减系数
激发
材料科学
分子物理学
非线性系统
光学
凝聚态物理
光电子学
化学
物理
激光器
波长
量子力学
光纤激光器
作者
Igor M. Gonçalves,Anusri Medda,Jessica E. Q. Bautista,Cecília L. A. V. Campos,Soubhik Ghosh,Amitava Patra,Anderson S. L. Gomes
摘要
We report on the nonlinear optical response of CdSe nanoplatelets and CdSe/CdS core/shell nanoplatelets in the heavy-hole resonant excitonic transition spectral regions with femtosecond pulses. The nonlinear refraction and saturable absorption coefficients were obtained using the Z-scan technique, and the results were explained theoretically. The nonlinear optical response under nonresonant excitation has been previously examined; comparing with the results presented in this work, at least a one order of magnitude increase in the nonlinear refraction coefficient is evident.
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