Li Xiangping, Chon James W M, Evans Richard A, Gu Min
Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia.
Opt Express. 2009 Feb 16;17(4):2954-61. doi: 10.1364/oe.17.002954.
Nanocrystal quantum rods (QRs) have been identified as an important potential key to future photonic devices because of their unique two-photon (2P) excitation, large 2P absorption cross section and polarization sensitivity. 2P excitation in a conventional solid photosensitive medium has driven all-optical devices towards three-dimensional (3D) platform architectures such as 3D photonic crystals, optical circuits and optical memory. The development of a QR-sensitized medium should allow for a polarization-dependent change in refractive index. Such a localized polarization control inside the focus can confine the light not only in 3D but also in additional polarization domain. Here we report on the first 2P absorption excitation of QR-dispersed photopolymers and its application to the fabrication of polarization switched waveguides, multi-dimensional optical patterning and optical memory. This fabrication was achieved by a 2P excited energy transfer process between QRs and azo dyes which facilitated 3D localized polarization sensitivity resulting in the control of light in four dimensions.
由于具有独特的双光子（2P）激发、大的2P吸收截面和偏振敏感性，纳米晶体量子棒（QRs）已被视为未来光子器件的一个重要潜在关键因素。传统固体光敏介质中的2P激发推动了全光器件向三维（3D）平台架构发展，如3D光子晶体、光学电路和光学存储器。QR敏化介质的发展应能实现与偏振相关的折射率变化。焦点内部的这种局部偏振控制不仅能在3D中，还能在额外的偏振域中限制光。在此，我们报道了QR分散光聚合物的首次2P吸收激发及其在偏振开关波导、多维光学图案化和光学存储器制造中的应用。这种制造是通过QR与偶氮染料之间的2P激发能量转移过程实现的，该过程促进了3D局部偏振敏感性，从而实现了对光的四维控制。
