Photon-Gated Spectral Hole-Burning in a Polymer Doped with a Mixture of Several Zn-Benzoporphyrin Derivatives

B. Luo, J. Galaup
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Abstract

Photochemical spectral hole-burning (PSHB) has attracted particular attention in the past decade because of its potential for frequency domain optical storage. In order to apply PSHB to a practical optical memory, the material should have high burning temperature, high thermal stability, erasability and high frequency multiplexing. Two ways are possible to increase the storage density: one is to narrow the homogeneous line width, the other is to broaden the inhomogeneous line width. In previous works, the larger inhomogeneous line width (greater than 1,000 cm–1) has been reached in polymethylmethacrylate (PMMA) doped with two kinds of Zn-benzoporphyrin derivatives with roughly the same hole-burning efficiencies [1]. In this paper, the authors investigate systematically the optical properties of Zn-benzoporphyrin derivatives, their hole-burning mechanisms, thermal stability and electron-phonon coupling in cellulose acetate (CA) and in PMMA matrices. The choice of CA was motivated mainly by the fact this polymer allows to prepare samples with excellent optical quality.
掺杂几种锌-苯并卟啉衍生物的聚合物的光子门控光谱烧洞
光化学光谱烧孔(PSHB)由于其在频域光存储方面的潜力,在过去的十年中引起了人们的特别关注。为了将PSHB应用于实用的光存储器,材料必须具有高燃烧温度、高热稳定性、可擦除性和高频率复用性。提高存储密度的方法有两种:一种是缩小均匀线宽,另一种是扩大非均匀线宽。在之前的研究中,掺杂两种zn -苯并卟啉衍生物的聚甲基丙烯酸甲酯(PMMA)具有更大的非均匀线宽(大于1000 cm-1),但烧孔效率大致相同[1]。本文系统地研究了锌-苯并卟啉衍生物在醋酸纤维素(CA)和PMMA基质中的光学性质、空穴燃烧机制、热稳定性和电子-声子耦合。选择CA的动机主要是由于这种聚合物可以制备具有优异光学质量的样品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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