Ultra-broadband on-chip beam focusing enabled by GRIN metalens on silicon-on-insulator platform.

Jian Shen, Yong Zhang, Yihang Dong, Zihan Xu, Jian Xu, Xueling Quan, Xihua Zou, Yikai Su

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Article in Nanophotonics (Berlin, Germany), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 citing paper in PubMed.

All-Dielectric Metasurface Lenses for Achromatic Imaging Applications.Nanoscale research letters · 2022
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Authors and funding

8 authors.

Jian ShenState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.ORCID https://orcid.org/0000-0001-7590-8839

Yong ZhangState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Yihang DongState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Zihan XuState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Jian XuCenter for Advanced Electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai 200240, China.

Xueling QuanCenter for Advanced Electronic Materials and Devices, Shanghai Jiao Tong University, Shanghai 200240, China.

Xihua ZouCenter for Information Photonics and Communications, School of Information Science and Technology, Southwest Jiao Tong University, Chengdu 611756, China.

Yikai SuState Key Lab of Advanced Optical Communication Systems and Networks, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.ORCID https://orcid.org/0000-0002-1526-8187

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Metalens has emerged as an important optical block in free-space optical systems, which shows excellent performance. Even the metalens based on gradient index (GRIN) profiles can be implemented for on-chip beam focusing behavior. However, for most previous schemes, the GRIN metalenses can only achieve on-chip beam focusing behavior in one dimension, which limits their applications in low-loss waveguide interconnecting or fiber-to-chip coupling. In this paper, an on-chip half Maxwell's fisheye lens based on GRIN profiles with subwavelength features, integrated with silicon waveguides, is experimentally demonstrated. Benefitting from the index distribution and beam focusing characteristics of the half Maxwell's fisheye lens, an on-chip beam transforming can be achieved for transverse electric (TE) fundamental mode in two waveguides with different heights and widths. The simulated 1 dB bandwidth can reach 1100 nm, which exhibits great prospects in integrated photonic circuits. The measured insertion loss of an on-chip 5.4 μm-length lens is less than 1 dB to connect a 220 nm-height, 8 μm-wide waveguide, and a 60 nm-height, 0.5 μm-wide waveguide in the wavelength range of 1280-1620 nm.

Indexed as

GRIN metalensintegrated deviceson-chip beam focusingsilicon photonicssubwavelength structures

Identifiers

PMID39634443

DOI10.1515/nanoph-2022-0242

PMCPMC11501878

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.