Ultracompact on-chip spectral shaping using pixelated nano-opto-electro-mechanical gratings

• 成果类型: Article
• 署名作者: Liu, Weixin; Xu, Siyu; Lee, Chengkuo
• 署名单位: National University of Singapore; National University of Singapore; National University of Singapore
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-12575
• DOI: 10.1126/science.adu8492
• 发表日期: 2025-08-21
• 页码: 806-810
• 关键词: bragg gratings; light

摘要

The ability to shape light spectra dynamically and arbitrarily would revolutionize many photonic systems by offering unparalleled spectral efficiency and network flexibility. However, most existing optical components have rigid spectral functionalities with limited tunability, hindering compact and fast optical spectral shaping. We introduce a pixelated nano-opto-electro-mechanical (NOEM) grating that exploits electromechanically induced symmetry breaking for precise, pixel-level control of grating coupling strength, yielding a miniaturized (similar to 0.007 square millimeters) on-chip spectral shaper. We demonstrate the synthesis of grating pixels for arbitrary spectral responses, and we achieved rapid (<10 nanoseconds), high-contrast (>100 decibels), wavelength-selective switching through collective, nanometer-scale electrostatic perturbations. Our pixelated NOEM grating delivers exceptional spectral manipulation capabilities in an ultracompact, on-chip manner, offering prospects for next-generation optical information networks, computing architectures, and beyond.