• A novel CPL detector using chiral-2D/3D perovskite heterostructures achieves panchromatic detection from 400-760 nm with a detectivity of 3.7×10^11 Jones.
• The detector utilizes a 3D perovskite layer for photoabsorption and spin-polarized carrier generation via Rashba splitting, combined with a chiral-2D perovskite layer for spin filtering.
• The detection mechanism relies on spin manipulation, including optical spin injection and chirality-induced spin selectivity (CISS), rather than traditional chiroptical absorption.

Researchers have engineered a new type of detector capable of efficiently detecting circularly polarized light (CPL) across a broad spectrum. This device utilizes a unique combination of three-dimensional (3D) and chiral two-dimensional (2D) perovskites to overcome limitations of conventional CPL detectors. The 3D perovskite layer facilitates efficient light absorption and generates spin-polarized carriers, while the chiral-2D perovskite layer acts as a spin filter, enabling highly sensitive and broadband CPL detection. This innovation has significant implications for optical communication, bioimaging, quantum computing, and spintronics.

• What: Development of a circularly polarized light (CPL) detector using chiral-2D/3D perovskite heterostructures, enabling panchromatic detection.
• Who: Researchers from Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology. Key individuals include Lvpeng Yang, Yerun Gao, Zhenye Wang, Long Yang, and Ming Shao.
• When: The article was published on May 5, 2025. The study likely took place over the preceding months or years.
• Where: Research conducted at Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.

The research addresses the limitations of existing CPL detectors by introducing a novel design that combines 3D and chiral-2D perovskites. The use of 3D perovskites broadens the detection range and enhances optoelectronic performance, while the chiral-2D perovskites enable efficient spin filtering. The proposed detection mechanism, based on spin manipulation, offers a significant departure from traditional chiroptical absorption methods. The findings have potential implications for advancing spintronics applications and related technologies.

The development of a chiral-2D/3D perovskite heterostructure-based CPL detector represents a significant advancement in the field. The detector's panchromatic response, high detectivity, and unique spin manipulation-based detection mechanism offer substantial improvements over existing technologies. This innovation paves the way for the development of advanced spintronic devices and applications, holding promise for future advancements in optical communication, bioimaging, and quantum computing.