電漿子超穎介面由多個金屬奈米集合而成，除了只需簡單的製程步驟，還具有微小的體積和靈活的光調控能力等優勢，可以解決以往傳統光學元件應用在微型系統時所遇到儀器厚重的問題。此外，經由精心的優化和設計，電漿子超穎介面可以在所需的工作波長範圍內實現高光學效率的多功能應用。然而，以往要利用超穎介面達到多波長高Q值的共振，常常需要引入複雜的共振模態或是使用交錯式/分割式的超穎介面，從而在單一超穎介面晶片下產生多重共振響應。此外，以上的方法通常會遇到需要更複雜的樣品製備過程，抑或是因複合結構的設計造成較低的光學轉換效率。
本文的研究中先是研究電漿子超穎介面的寬頻響應特性，並應用於無需光譜儀的電漿子感測器，從而實現寬頻的折射率感測。接著，引入共振腔和電漿子超穎介面之間的交互作用，除了產生單波長高品質因子共振並同時動態操控雷射源之偏振態，還可以利用厚度漸變的DBR作為基板，在寬的波長範圍內產生多波長的高Q值共振。相較於先前研究中激發的多重共振，我們提出的方法具有更簡單的設計和更高的工作效率，並且將其應用在多通道全像影像、結構色刻印、光學加密和快照式高光譜影像系統。因此，以上我們的研究由於新穎和突破性的設計，有望應用在新一代的微型光學系統中。

Plasmonic metasurfaces composed of numerous metallic nanostructures possess simple fabrication process, compact physical size and flexible light manipulation, which can address the issue of bulky instruments with conventional optical components in miniaturized systems. Through careful optimization and design, plasmonic metasurfaces can achieve high optical conversion efficiency in multifunctional applications within the specific working wavelength range. However, realizing multiple high-Q resonances in a metasurfaces chip often relied on mode hybridization or introduction of interleaved/segmented metasurface, which typically requires complicated fabrication processes. In addition, these approaches also result in lower optical conversion efficiency due to the design of composite nanostructures.
In this work, we began from investigating the broadband response characteristics of plasmonic metasurfaces and develop plasmonic sensors without the requirement of spectrometers to realize broadband refractive index sensing. Next, by introducing the interaction between Fabry–Pérot cavity and plasmonic metasurface, the single high-Q resonance at designed wavelength was generated. Furthermore, the polarization state of the laser source can be dynamically controlled by rotating the whole microcavity. Then, a gradient-thickness DBR was introduced in metasurface to generate multiple high-Q resonances over wide wavelength range. Compared to previous studies, our approach offers a simpler design and higher working efficiency, which can be used in various applications like multi-channel holographic, structural color printing, and snapshot hyperspectral imaging systems. Therefore, benefited from its novel and breakthrough design, our research holds promise for applications in the next generation of miniaturized optoelectronic systems.

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