Integrated photonic polarizers with 2D reduced graphene oxide
二维还原氧化石墨烯集成光子偏振器
2D減少酸化グラフェン付きの統合光子極化器
2D 감소 된 산화 그래2를 가진 통합 광자 극화기
Polarizadores fotonicos integrados con óxido de grafeno reducido 2D
Polarisateurs photoniques intégrés avec oxyde de graphène réduit 2D
Интегрированные фотонические поляризаторы с 2D уменьшенным оксидом графена
Junkai Hu ¹ ², Jiayang Wu ¹, Di Jin ¹ ², Wenbo Liu ¹ ³ ⁴, Yuning Zhang ⁵, Yunyi Yang ¹, Linnan Jia ³ ⁴, Yijun Wang ², Duan Huang ⁶ ⁷, Baohua Jia ³ ⁴, David J. Moss ¹
¹ Optical Sciences Centre, Swinburne University of Technology, Melbourne 3122, Australia
² School of Automation, Central South University, Changsha 410083, China
中国 长沙 中南大学自动化学院
³ School of Science, RMIT University, Melbourne 3000, Australia
⁴ The Australian Research Council (ARC) Industrial Transformation Training Centre in Surface Engineering for Advanced Materials (SEAM), RMIT University, Melbourne 3000, Australia
⁵ School of Physics, Peking University, Beijing 100871, China
中国 北京 北京大学物理学院
⁶ School of Electronic Information, Central South University, Changsha 410083, China
中国 长沙 中南大学电子信息学院
⁷ Hefei National Laboratory, Hefei 230088, China
中国 合肥 合肥国家实验室
Optical polarizers, which allow the transmission of specific polarization states, are essential components in modern optical systems. Here, we experimentally demonstrate integrated photonic polarizers incorporating reduced graphene oxide (rGO) films. 2D graphene oxide (GO) films are integrated onto silicon waveguides and microring resonators (MRRs) with precise control over their thicknesses and sizes, followed by GO reduction via two different methods including uniform thermal reduction and localized photothermal reduction.
We measure devices with various lengths, thicknesses, and reduction degrees of GO films. The results show that the devices with rGO exhibit better performance than those with GO, achieving a polarization-dependent loss of ~47 dB and a polarization extinction ratio of ~16 dB for the hybrid waveguides and MRRs with rGO, respectively. By fitting the experimental results with theory, it is found that rGO exhibits more significant anisotropy in loss, with an anisotropy ratio over 4 times that of GO.
In addition, rGO shows higher thermal stability and greater robustness to photothermal reduction than GO. These results highlight the strong potential of rGO films for implementing high-performance polarization selective devices in integrated photonic platforms.
