https://doi.org/10.1140/epjp/s13360-024-05061-x
Regular Article
A linearly polarized white light based on a composite metal-dielectric-metal nanowire grating
1
Research Institute of Photonics, Dalian Polytechnic University, 116034, Dalian, China
2
School of Opto-Electronic Engineering, Changchun University of Science and Technology, 130022, Changchun, China
c
n_y_zou@dlpu.edu.cn
f
fuyg@cust.edu.cn
Received:
12
January
2024
Accepted:
4
March
2024
Published online:
19
July
2024
A linearly polarized white light emitting from blue chip capitalized on a composite metal-dielectric-metal nanowire grating is proposed. The finite-difference time-domain method is used to simulate the whole structure for pursuing high transmittance and high extinction ratio. Based on the laboratory process level with a period of 180 nm and a fill ratio of 0.5, the optimal parameters of the composite metal-dielectric-metal nanowire grating are determined as aluminum with a height of 75 nm, and PMMA with a height of 100 nm. After multi-parameter optimization analysis, the theoretical extinction ratio in the wavelength of 400–700 nm is 33–50 dB, and the transmittance of TM-polarized wave is 50–85% at incident angle range of ± 15°. A large area of composite metal-dielectric-metal nanowire grating is fabricated by nanoimprint lithography technology, and its performance is tested by spectrometer and highly quality polarizing analyzer under the condition of white light source and 632 nm laser. The results show that the extinction ratio and transmittance of TM-polarized wave can reach up to 38.3 dB and 75% when the light source is under normal incidence at the whole wavelength range. The presented findings provide an alternative path for low-cost, large-area fabrication of high-performance polarized white light, which can be applied to color display or other polarized optoelectronics devices.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
