Dynamically Reconfigurable on-Chip Polarimeters Based on Nanoantenna Enabled Polarization Dependent Optoelectronic Computing

• Published in: Nano letters 2024-01, Vol.24 (3), p.983-992
• Main Authors: Dai, Xu, Yu, Yu, Ye, Tao, Deng, Jie, Bu, Yonghao, Shi, Mengdie, Wang, Ruowen, Zhou, Jing, Sun, Liaoxin, Chen, Xiaoshuang, Shen, Xuechu
• Format: Article
• Language: English
• ISSN: 1530-6984; 1530-6992
• DOI: 10.1021/acs.nanolett.3c04454

On-chip polarization detectors have attracted extensive research interest due to their filterless and ultracompact architecture. However, their polarization-dependent photoresponses cannot be dynamically adjusted, hindering the development toward intelligence. Here, we propose dynamically reconfigurable polarimetry based on in-sensor differentiation of two self-powered photoresponses with orthogonal polarization dependences and tunable responsivities. Such a device can be electrostatically configured in an ultrahigh polarization extinction ratio (PER) mode, where the PER tends to infinity, a Stokes parameter direct sensing mode, where the photoresponse is proportional to S 1 or S 2 with high accuracy (RMSE S1 = 1.5%, RMSE S2 = 2.0%), or a background suppressing mode, where the target-background polarization contrast is singularly enhanced. Moreover, the device achieves a polarization angle sensitivity of 0.51 mA·W–1·degree–1 and a specific polarization angle detectivity of 2.8 × 105 cm·Hz1/2·W·degree–1. This scheme is demonstrated throughout the near-to-long-wavelength infrared range, and it will bring a leap for next-generation on-chip polarimeters.