Controlled Replication of Butterfly Wings for Achieving Tunable Photonic Properties
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- 作者：Jingyun Huang ; Xudong Wang ; Zhong Lin Wang
- 刊名：Nano Letters
- 出版年：2006
- 出版时间：October 2006
- 年：2006
- 卷：6
- 期：10
- 页码：2325 - 2331
- 全文大小：1894K
- 年卷期：v.6,no.10(October 2006)
- ISSN：1530-6992
文摘
The fine structure of the wing scale of a Morpho Peleides butterfly was examined carefully, and the entire configuration was completelyreplicated by a uniform Al2O3 coating through a low-temperature ALD process. An inverted structure was achieved by removing the butterflywing template at high temperature, forming a polycrystalline Al2O3 shell structure with precisely controlled thickness. Other than the copy ofthe morphology of the structure, the optical property, such as the existence of PBG, was also inherited by the alumina replica. Reflectionpeaks at the violet/blue range were detected on both original wings and their replica, while a simple alumina coating shifted the reflectionpeak to longer wavelength because of the change of periodicity and refraction index. The alumina replicas also exhibited similar functionalstructures as waveguide and beam splitter, which may be used as the building blocks for photonic ICs with high reproducibility and lowerfabrication cost compared to traditional lithography techniques.