Generation of super-resolved optical needle and multifocal array using graphene oxide metalenses
使用氧化石墨烯超透镜生成超分辨光学针和多焦点阵列
酸化グラフェンメタレンスを使用した超解像光学針と多焦点アレイの生成
그래핀 옥사이드 메탈렌즈를 이용한 초해상 광학 바늘 및 다초점 어레이 생성
Generación de aguja óptica superesuelta y matriz multifocal utilizando metalentes de óxido de grafeno
Génération d'aiguilles optiques super-résolues et de matrice multifocale à l'aide de métalenses en oxyde de graphène
Создание оптической иглы со сверхвысоким разрешением и мультифокальной матрицы с использованием металентей оксида графена
Hongtao Wang ¹ ² ³ ⁴, Chenglong Hao 郝成龙 ³, Han Lin 林瀚 ¹, Yongtian Wang 王涌天 ², Tian Lan 蓝天 ², Cheng-Wei Qiu 仇成伟 ³, Baohua Jia 贾宝华 ¹
¹ Centre for Translational Atomaterials, Faculty of Science, Engineering and Technology, Swinburne University of Technology, P.O. Box 218, Hawthorn VIC 3122, Australia
² Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
中国 北京 北京理工大学光电学院 光电成像技术与系统教育部重点实验室
³ Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
⁴ Engineering Product Development Pillar, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore
Ultrathin flat metalenses have emerged as promising alternatives to conventional diffractive lenses, offering new possibilities for myriads of miniaturization and interfacial applications. Graphene-based materials can achieve both phase and amplitude modulations simultaneously at a single position due to the modification of the complex refractive index and thickness by laser conversion from graphene oxide into graphene like materials.
In this work, we develop graphene oxide metalenses to precisely control phase and amplitude modulations and to achieve a holistic and systematic lens design based on a graphene-based material system. We experimentally validate our strategies via demonstrations of two graphene oxide metalenses: one with an ultra-long (~16λ) optical needle, and the other with axial multifocal spots, at the wavelength of 632.8 nm with a 200 nm thin film. Our proposed graphene oxide metalenses unfold unprecedented opportunities for accurately designing graphene-based ultrathin integratable devices for broad applications.
