Direct observation of bulk second-harmonic generation inside a glass slide with tightly focused optical fields
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Issue Date
2016-04-18Author
Wang, Xianghui
Fardad, Shima
Das, Susobhan
Slandrino, Alessandro
Hui, Rongqing
Publisher
American Physical Society
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
©2016 American Physical Society
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Show full item recordAbstract
Bulk second-harmonic generation (SHG) inside glass slides is directly detected unambiguously without interference from surface contributions. This is enabled by tightly focused and highly localized ultrashort laser pulses. The theoretical calculations based on vector diffraction theory and the phenomenological model of SHG inside centrosymmetric materials agree well with the measured far-field SHG radiation patterns for different polarization states of the fundamental beam. The results indicate that the observed bulk SHG is predominantly related to the bulk parameter δ′ and originates from the three-dimensional field gradient in the focal region.
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Citation
Wang, X., Fardad, S., Das, S., Salandrino, A., & Hui, R. (2016). Direct observation of bulk second-harmonic generation inside a glass slide with tightly focused optical fields. Physical Review B, 93(16). doi:10.1103/physrevb.93.161109
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