Abstract
Interference pattern of two different wavelengths, forming a four-sided pyramid consisting of eight beams, is discussed. Synchronization between two wavelengths having a multiple relationship, which corresponds to mixing of fundamental and second-harmonic generation wavelengths, forms a stationary interference pattern successfully. Phase shift variation of a beam changes the basic pattern of interference. This technique can be a new scheme for multi-wavelength material processing with periodic structure and will increase the variation of meta-atoms fabricated by interfering femtosecond laser processing.
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Acknowledgments
This research was financially supported by the Japan Society for the Promotion of Science (JSPS) through a Grant-in-Aid for Scientific Research (B) (No. 23360035).
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Nakata, Y., Matsuba, Y., Murakawa, K. et al. Change of interference pattern using fundamental and second-harmonic wavelengths by phase shift of a beam. Appl. Phys. A 117, 207–210 (2014). https://doi.org/10.1007/s00339-014-8361-z
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DOI: https://doi.org/10.1007/s00339-014-8361-z