journal article·2023-10-24Open access

Significant Enhancement of Circular Polarization in Light Emission through Controlling Helical Pitches of Semiconductor Nanohelices

Ziyue Ni, Ping Qin, Hongshuai Liu, Jiafei Chen, Siyuan Cai, Wenying Tang, Hui Xiao, Chen Wang, Geping Qu, Chao Lin, Zhiyong Fan, Zong-Xiang Xu, Guixin Li, Zhifeng Huang

ACS Nano· Volume 17· Issue 20

Abstract

High Resolution Image Download MS PowerPoint Slide Circularly polarized light emission (CPLE) can be potentially applied to three-dimensional displays, information storage, and biometry. However, these applications are practically limited by a low purity of circular polarization, i.e., the small optical dissymmetry factor g CPLE . Herein, glancing angle deposition (GLAD) is performed to produce inorganic nanohelices (NHs) to generate CPLE with large g CPLE values. CdSe NHs emit red CPLE with g CPLE = 0.15 at a helical pitch ( P ) ≈ 570 nm, having a 40-fold amplification of g CPLE compared to that at P ≈ 160 nm. Ceria NHs emit ultraviolet–blue CPLE with g CPLE ≈ 0.06 at P ≈ 830 nm, with a 10 3 -fold amplification compared to that at P ≈ 110 nm. Both the photoluminescence and scattering among the close-packed NHs complicatedly account for the large g CPLE values, as revealed by the numerical simulations. The GLAD-based NH-fabrication platform is devised to generate CPLE with engineerable color and large g CPLE = 10 –2 –10 –1, shedding light on the commercialization of CPLE devices.
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Research context

OpenAlex topics: Quantum Dots Synthesis And Properties · Optical Coatings and Gratings · Photonic Crystals and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR 999077, People’s Republic of China

Department of Biology, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR 999077, People’s Republic of China

School of Science, Harbin Institute of Technology, Shenzhen 518055, People’s Republic of China

Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People’s Republic of China

Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People’s Republic of China

Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, People’s Republic of China

Department of Chemistry, Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People’s Republic of China

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China

Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR 999077, People’s Republic of China

Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR 999077, People’s Republic of China

Funding

National Natural Science Foundation of China · General Research Fund, University Grants Committee

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