Polarization Image Sensor for Highly Sensitive Polarization Modulation Imaging Based on Stacked Polarizers

Kiyotaka Sasagawa, Ryoma Okada, Makito Haruta, Hironari Takehara, Hiroyuki Tashiro, Jun Ohta

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this article, We demonstrated an image sensor for detecting changes in polarization with high sensitivity. For this purpose, we constructed an optical system with a two-layer structure, comprising an external polarizer and polarizers on a pixel array. An external polarizer is used to enhance the polarization rotation while reducing the intensity to avoid pixel saturation of the image sensor. Using a two-layer structure, the two polarizers can be arranged under optimal conditions and the image sensor can achieve high polarization-change detection performance. We fabricated the polarization image sensor using a 0.35-μm CMOS process and, by averaging 50 ×, 50 pixels and 96 frames, achieved a polarization rotation detection limit of 5.2 ×, 10-4° at a wavelength of 625 nm. We also demonstrated the applicability of electric-field distribution imaging using an electrooptic crystal (ZnTe) for weak-polarization-change distribution measurements.

Original languageEnglish
Pages (from-to)2924-2931
Number of pages8
JournalIEEE Transactions on Electron Devices
Volume69
Issue number6
DOIs
Publication statusPublished - Jun 1 2022

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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