Innovative Inverse-Design Approach for On-Chip Computational Spectrometers: Enhanced Performance and Reliability

分光计 可靠性(半导体) 计算机科学 反向 光谱分辨率 成像光谱仪 电子工程 功率(物理) 光学 物理 工程类 数学 天文 几何学 谱线 量子力学
作者
Ang Li,Yifan Wu,Gongyuan Zhang,Chang Wang,Jijun He,Yaqi Shi,Zongyin Yang,Shilong Pan
出处
期刊:Engineering [Elsevier BV]
标识
DOI:10.1016/j.eng.2024.07.011
摘要

Computational spectrometers utilizing disordered structures have emerged as promising solutions for meeting the imperative demand for integrated spectrometers, offering high performance and improved resilience to fabrication variations and temperature fluctuations. However, the current computational spectrometers are impractical because they rely on a brute-force random design approach for disordered structures. This leads to an uncontrollable, non-reproducible, and suboptimal spectrometer performance. In this study, we revolutionize the existing paradigm by introducing a novel inverse design approach for computational spectrometers. By harnessing the power of inverse design, which has traditionally been applied to optimize single devices with simple performance, we successfully adapted it to optimize a complex system comprising multiple correlated components with intricate spectral responses. This approach can be applied to a wide range of structures. We validated this by realizing a spectrometer utilizing a new type of disordered structure based on interferometric effects that exhibits negligible loss and high sensitivity. For a given structure, our approach yielded a remarkable 12-times improvement in the spectral resolution and a four-fold reduction in the cross-correlation between the filters. The resulting spectrometer demonstrated reliable and reproducible performance with the precise determination of structural parameters.
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