Next‐Generation Organic Photonics: The Emergence of Flexible Crystal Optical Waveguides,Advanced Optical Materials

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Next‐Generation Organic Photonics: The Emergence of Flexible Crystal Optical Waveguides
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-09-09 , DOI: 10.1002/adom.202000959
Mari Annadhasan ₁ , Supratim Basak _{1,

2} , Naisa Chandrasekhar _{1,

3} , Rajadurai Chandrasekar ₁

Affiliation

Organic crystals possessing both flexibility and light‐guiding properties are attractive candidates for spatial control of the light output for next‐generation technological applications, namely photonic devices and circuits, optoelectronic devices, optical sensors, and so on. Most of the organic crystals are inclined to break or crack under external stress limiting their usage in many device applications. However, some molecular crystals are bizarrely flexible due to the presence of unusual molecular packing and weak intermolecular interactions. This comprehensive review summarizes these remarkably flexible organic crystal waveguides reported to date. The summary also includes i) naturally bent active/passive crystal waveguides, ii) various external factors (mechanical, chemical, light) which trigger bending of macrocrystals, iii) a comparison between the crystal structure of both linear and bent waveguides, and the use of crystal engineering strategies in designing flexible waveguides, iv) advent of micromechanical manipulation technique based on atomic force microscopy to effectively modify the geometry and position crystals as small as <2 µm, v) some promising next‐generation devices made from flexible crystals such as organic field‐effective waveguides, wavelength division multiplexing, polarization rotors, and optical directional couplers, and vi) future outlook and opportunities of this growing research field.

中文翻译：

下一代有机光子学：柔性晶体光波导的出现

同时具有柔韧性和导光性能的有机晶体是光技术设备和电路，光电设备，光学传感器等下一代技术应用中光输出空间控制的诱人候选物。大多数有机晶体倾向于在外部应力下破裂或破裂，从而限制了它们在许多器件应用中的使用。但是，由于存在异常的分子堆积和弱的分子间相互作用，因此某些分子晶体具有奇异的柔性。这份全面的综述总结了迄今为止报道的这些非常灵活的有机晶体波导。该摘要还包括：i）自然弯曲的有源/无源晶体波导，ii）触发大晶体弯曲的各种外部因素（机械，化学，光），< 2 μ M，V）由柔性的晶体进行了一些有希望的下一代器件如有机场有效波导，波分复用，偏振转子，和光定向耦合器，以及vi）未来前景和这种日益增长的研究领域的机会。

更新日期：2020-11-04

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