光学
光子集成电路
电介质
材料科学
电子线路
折射率
光子学
集成光学
相变
集成电路
相(物质)
光电子学
物理
工程物理
量子力学
作者
Forrest R. Miller,Rui Chen,Johannes Froech,Hannah Rarick,Sarah Dee Geiger,Arka Majumdar
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-04-26
卷期号:48 (9): 2385-2385
摘要
Photonic integrated circuits (PICs) have the potential to drastically expand the capabilities of optical communications, sensing, and quantum information science and engineering. However, PICs are commonly fabricated using selective material etching, a subtractive process. Thus, the chip's functionality cannot be substantially altered once fabricated. Here, we propose to exploit wide-bandgap non-volatile phase-change materials (PCMs) to create a rewritable PIC platform. A PCM-based PIC can be written using a nano-second pulsed laser without removing any material, akin to rewritable compact disks. The whole circuit can then be erased by heating, and a completely new circuit can be rewritten. We designed a dielectric-assisted PCM waveguide consisting of a thick dielectric layer on top of a thin layer of wide-bandgap PCMs Sb2S3 and Sb2Se3. The low-loss PCMs and our engineered waveguiding structure lead to a negligible optical loss. Furthermore, we analyzed and specified the spatio-temporal laser pulse shape to write the PCMs. Our proposed platform will enable low-cost manufacturing and have a far-reaching impact on the rapid prototyping of PICs, validation of new designs, and photonic education.
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