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Optical and Electrical Memories for Analog Optical Computing

https://doi.org/10.1109/JSTQE.2023.3239918

Kari, Sadra Rahimi ; Rios Ocampo, Carlos A. ; Jiang, Lei ; Meng, Jiawei ; Peserico, Nicola ; Sorger, Volker J. ; Hu, Juejun ; Youngblood, Nathan ( March 2023 , IEEE Journal of Selected Topics in Quantum Electronics)

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Reconfigurable metasurfaces towards commercial success

https://doi.org/10.1038/s41566-022-01099-4

Gu, Tian ; Kim, Hyun Jung ; Rivero-Baleine, Clara ; Hu, Juejun ( January 2023 , Nature Photonics)

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Near-infrared metalens for high-resolution and deep focus optical coherence tomography

https://doi.org/10.1063/5.0131170

Haerinia, Mohammad ; Zheng, Bowen ; Hutchins, Aaron ; Tang, Hong ; Li, Hang ; Dong, Yunxi ; Guo, Wei ; Zhang, Hualiang ( December 2022 , AIP Advances)

High-resolution endoscopic optical imaging is a crucial technique in biological imaging to examine the inside organs. There is a trade-off between lateral resolution and depth of focus in such applications. Traditional Optical Coherence Tomography provides an increased depth range but falls short of desired resolution. The combination of both higher resolution and larger imaging depth of focus of metalens can improve the clinical utility of endoscopic optical imaging. In this work, we designed, analyzed, and fabricated a 500 µm diameter metalens operating at 1300 nm to achieve high resolution and large imaging depth of focus, therefore, addressing this need. The full width at half maximum and depth of focus for the proposed metalens are 3.10 and 286 µm, respectively.
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Are phase change materials ideal for programmable photonics?: opinion

https://doi.org/10.1364/OME.456895

Simpson, Robert E. ; Yang, Joel K. W. ; Hu, Juejun ( June 2022 , Optical Materials Express)

The objective of this Opinion is to stimulate new research into materials that can meet the needs of tomorrow’s programmable photonics components. Herein, we argue that the inherent property portfolios of the common telluride phase change materials, which have been successfully applied in data storage technologies, are unsuitable for most emerging programmable photonics applications. We believe that newer PCMs with wider bandgaps, such as Sb₂S₃, Sb₂Se₃, and Ge₂Sb₂Se₄Te (GSST), can be optimized to meet the demands of holographic displays, optical neural network memories, and beam steering devices.

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