Nanoscale light–matter interactions in metal–organic frameworks cladding optical fibers

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Jieyun Wu
  • Wanying Zhang
  • Ying Wang
  • Youbin Zheng
  • Lianzhong Jiang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)9991-10000
Journal / PublicationNanoscale
Volume12
Issue number18
Online published28 Feb 2020
Publication statusPublished - 14 May 2020

Abstract

The utilization of refractive index (RI) change due to guest-host interactions between the guest volatile organic compound vapor and porous metal-organic frameworks (vapor-MOF interactions) is promising in photonic vapor sensors. Therefore, the study of light-matter interactions in nanoporous metal-organic frameworks (MOFs) is fundamental and essential for MOF-based photonic devices. In this work, the manipulation of light in MOFs to investigate the vapor-MOF interactions by using optical fiber devices is demonstrated. The vapor-MOF interactions and the light-vapor interactions (light in MOFs to sense the RI changes resulting from the vapor-MOF interactions) are investigated. The cladding mode is excited by a long-period fiber grating (LPFG) for evanescent field sensing in a ZIF-8 sensitive coating. The experimental results combining quantum chemical calculations and optical simulations reveal the relationships between the microscopic energy of vapor desorption, RI changes and evanescent field enhancement in ZIF-8 during the vapor-MOF interactions. With exceptionally large RI changes, the evanescent field of cladding mode in ZIF-8 is greatly enhanced to sense the vapor-MOF interactions. As a proof-of-concept, a LPFG sensor with ZIF-8 coating showed a high sensitivity of 1.33 pm ppm-1 in the linear range from 9.8 ppm to 540 ppm for the sensing of ethanol vapor. The investigation of light-matter interactions in ZIF-8 provides a useful guideline for the design and fabrication of MOF-based optical waveguide/fiber sensors.

Citation Format(s)

Nanoscale light–matter interactions in metal–organic frameworks cladding optical fibers. / Wu, Jieyun; Zhang, Wanying; Wang, Ying; Li, Binghui; Hao, Ting; Zheng, Youbin; Jiang, Lianzhong; Chen, Kaixin; Chiang, Kin Seng.

In: Nanoscale, Vol. 12, No. 18, 14.05.2020, p. 9991-10000.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal