Controlling Microring Resonator Extinction Ratio via Metal-Halide Perovskite Nonlinearity

Feifan Wang, Lianfeng Zhao, Yahui Xiao, Tiantian Li, Yixiu Wang, Anishkumar Soman, Hwaseob Lee, Thomas Kananen, Xiaoyong Hu, Barry P. Rand, Tingyi Gu

Research output: Contribution to journalArticlepeer-review

Abstract

The exceptionally high optical nonlinearities, wide bandgap, and homogeneity in solution-processed metal-halide perovskite media are utilized as optical nonlinear elements on a silicon photonic platform for low-power-active components, such as all-optical switches, modulators, and lasers. With room temperature back-end-of-line compatible processing, a hybrid metal-halide perovskite (CH3NH3PbI3) microring resonator (MRR) structure is fabricated on a foundry-processed low-loss silicon photonic platform. With in-plane excitation near the light intensity of 110 W m−2, strong two-photon absorption and free-carrier absorption saturation are observed. With 103 field enhancements by MRRs, the photorefractive effect in the metal-halide perovskite reduces linear absorption, represented by 102 improvement of the MRR's intrinsic quality factor and 20 dB enhancement of the extinction ratio.

Original languageEnglish (US)
Article number2100783
JournalAdvanced Optical Materials
Volume9
Issue number22
DOIs
StatePublished - Nov 18 2021

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Keywords

  • absorption saturation
  • microring resonator
  • perovskites
  • photorefraction
  • two-photon absorption

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