Experimental verification of enhanced electromagnetic field intensities at the photonic stop band edge of 3D polystyrene photonic crystals using Z-Scan technique

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• 作者：K. Shadak Alee ; M. Bala Murali Krishna ; B. Ashok ; D. Narayana Rao ; ^{dnrsp@uohyd.ernet.in} ; ^{dnr.laserlab@gmail.com}
• 关键词：Photonic crystal ; Optical limiting ; Z-scan ; Polystyrene
• 刊名：Photonics and Nanostructures - Fundamentals and Applications
• 出版年：2012
• 期刊代码：120_15694410
• 类别：ms
• 出版时间：April, 2012
• 卷：10
• 期：2
• 页码：236-242
• 文件大小：670 K

摘要

Enhancement of nonlinear absorption of polystyrene (PS) was investigated using 3D PS photonic crystals (PCs) with Z-scan technique. The Z-scan experiment was carried out at 532 nm in the picosecond (ps) regime. The transmittance of the PC was found to get modified because of the nonlinear absorption of PS particularly when 532 nm is near the photonic stop band (PSB) edge of PC. Calculations show that the field gets enhanced by 1.4 times the input field intensity within the crystal when the 532 nm wavelength falls at the PSB edge while keeping the crystal at an angle of 35掳.