Holographic planar lightwave circuit for on-chip spectroscopy
Holographic planar lightwave circuit for on-chip spectroscopy
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DOI：
10.1038/lsa.2014.84
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发表时间：
2014-09-01
影响因子：
19.4
通讯作者：
Peroz, Christophe
中科院分区：
文献类型：
--
作者：
Calafiore, Giuseppe;Koshelev, Alexander;Peroz, Christophe
计算平面全息图是设计具有独特特性的平面光波导路的一种强有力的方法。特别是数字平面全息图可以编码具有高度可定制性的任何光学传递函数，并且与半导体光刻技术和纳米压印光刻技术兼容。在这里，我们证明了在单个设备上集成多个全息图增加了光谱仪的整体光谱范围，并抵消了小型化导致的任何性能下降。基于数字平面全息图的高分辨率片上光谱仪的验证显示出与宏光谱仪相当的性能。新开发的光谱仪在保持总设备占地面积低于2 cm（2）的同时，在148 nm光谱范围和926个通道内，在红色和近红外范围内实现了0.15 nm的光谱分辨率。这种方法为未来的片上光谱学和片上实验室传感奠定了基础。
Computer-generated planar holograms are a powerful approach for designing planar lightwave circuits with unique properties. Digital planar holograms in particular can encode any optical transfer function with high customizability and is compatible with semiconductor lithography techniques and nanoimprint lithography. Here, we demonstrate that the integration of multiple holograms on a single device increases the overall spectral range of the spectrometer and offsets any performance decrement resulting from miniaturization. The validation of a high-resolution spectrometer-on-chip based on digital planar holograms shows performance comparable with that of a macrospectrometer. While maintaining the total device footprint below 2 cm(2), the newly developed spectrometer achieved a spectral resolution of 0.15 nm in the red and near infrared range, over a 148 nm spectral range and 926 channels. This approach lays the groundwork for future on-chip spectroscopy and lab-on-chip sensing.