Dynamically Reconfigurable on-Chip Polarimeters Based on Nanoantenna Enabled Polarization Dependent Optoelectronic Computing.
basic_science · Level V
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- Record sourced from PubMed, PMID 38206182.
- Also identified by DOI 10.1021/acs.nanolett.3c04454.
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Abstract
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 <i>S</i><sub>1</sub> or <i>S</i><sub>2</sub> with high accuracy (RMSE<sub><i>S</i>1</sub> = 1.5%, RMSE<sub><i>S</i>2</sub> = 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<sup>-1</sup>·degree<sup>-1</sup> and a specific polarization angle detectivity of 2.8 × 10<sup>5</sup> cm·Hz<sup>1/2</sup>·W·degree<sup>-1</sup>. This scheme is demonstrated throughout the near-to-long-wavelength infrared range, and it will bring a leap for next-generation on-chip polarimeters.