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High-efficiency multi-port beam control device based on periodic nanodisk arrays.
- Source :
-
Optics & Laser Technology . Aug2022, Vol. 152, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • The nano-grating has the multi-port beam control for four- or five-port output in a 2D plane by with nanodisk arrays. • For four-port output, (0, ±1) and (±1, 0) orders are 24.11% and 23.72% with a PDL of 0.08 dB. • For five-port output, (0, 0), (0, ±1) and (±1, 0) orders are 19.29%, 19.45% and 19.36% with a PDL of 0.06 dB. In this article, a multi-port two-dimensional (2D) reflective grating by a nanodisk array is proposed, which can be used for high-efficiency four-port ((0, ±1) and (±1, 0) orders) and five-port ((0, 0), (0, ±1) and (±1, 0) orders) optical control at a communication wavelength. Finite element method provides fast and effective optimization and analysis of the proposed 2D grating, while the 3D finite-difference time-domain provides strong support for the data in this paper. The four-port grating beam splitter has an efficiency of nearly 24% for all main diffraction orders with uniformity and polarization-dependent losses (PDL) of 0.8% and 0.08 dB, respectively. Meanwhile, the five-port grating beam splitter achieves an efficiency of over 19% for each diffraction order and in excess of 96% overall, with a uniformity and PDL of 0.4% and 0.06 dB, respectively. In addition, the detailed analysis of bandwidth performance and manufacturing tolerances shows the advantages of the proposed 2D nano-grating in practical applications and manufacturing. These findings have positive implications for future research on 2D nano-gratings, and the proposed 2D nano-grating has promising applications in the fields of sensor networks, grating measurements, photonic crystals, etc. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00303992
- Volume :
- 152
- Database :
- Academic Search Index
- Journal :
- Optics & Laser Technology
- Publication Type :
- Academic Journal
- Accession number :
- 156713656
- Full Text :
- https://doi.org/10.1016/j.optlastec.2022.108102