Photoinduced self-assembly of nanocrystals inside Al2O3-Lu2O3 glass

IF 2.3 Q2 OPTICS
T. Okuno, Y. Shimotsuma, M. Shimizu, K. Miura
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引用次数: 0

Abstract

The femtosecond laser direct writing technique can allow spatially selective crystallization with suppression of thermal conduction effects. In the case of Al2O3-R2O3 (R = Y, Dy) glass, the polarization-dependent periodic nanostructure with crystallization is self-assembled, however, the formation mechanism of self-assembled nanocrystals in glass remains to be clarified. We focused on Al2O3-Lu2O3 glass prepared by a containerless laser melting method and demonstrated the formation of a nanograting with crystallization by femtosecond laser irradiation. Polarized luminescence measurements of the crystallized region by the pulse bursts with a controllable number of pulses reveal that luminescence anisotropy increased at more than 50 pulses in a burst, suggesting the formation of the nanograting. We have also followed the time variation of birefringence by polarized light imaging to evaluate the time scale for the formation of nanogratings with crystallization.
纳米晶体在Al2O3-Lu2O3玻璃中的光诱导自组装
飞秒激光直接写入技术可以在抑制热传导效应的情况下实现空间选择性结晶。在Al2O3-R2O3(R=Y,Dy)玻璃的情况下,具有结晶的极化依赖性周期性纳米结构是自组装的,然而,自组装纳米晶体在玻璃中的形成机制仍有待阐明。我们重点研究了用无容器激光熔融方法制备的Al2O3-Lu2O3玻璃,并演示了飞秒激光照射下结晶形成的纳米光栅。通过具有可控脉冲数的脉冲串对结晶区域的偏振发光测量表明,在脉冲串中超过50个脉冲时,发光各向异性增加,这表明纳米光栅的形成。我们还通过偏振光成像跟踪了双折射的时间变化,以评估形成结晶纳米光栅的时间尺度。
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来源期刊
CiteScore
4.40
自引率
0.00%
发文量
23
期刊介绍: Advanced Optical Technologies is a strictly peer-reviewed scientific journal. The major aim of Advanced Optical Technologies is to publish recent progress in the fields of optical design, optical engineering, and optical manufacturing. Advanced Optical Technologies has a main focus on applied research and addresses scientists as well as experts in industrial research and development. Advanced Optical Technologies partners with the European Optical Society (EOS). All its 4.500+ members have free online access to the journal through their EOS member account. Topics: Optical design, Lithography, Opto-mechanical engineering, Illumination and lighting technology, Precision fabrication, Image sensor devices, Optical materials (polymer based, inorganic, crystalline/amorphous), Optical instruments in life science (biology, medicine, laboratories), Optical metrology, Optics in aerospace/defense, Simulation, interdisciplinary, Optics for astronomy, Standards, Consumer optics, Optical coatings.
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