Photothermal property investigation of V2CTx MXene and its use for all-optical modulator

Suh young Kwon, Jinho Lee, Young In Jhon, Geunweon Lim, Young Min Jhon, Ju Han Lee

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

MXenes, as novel two-dimensional materials, have garnered significant attention in the field of lasers and photonics owing to their outstanding electronic and optical properties. The results pertaining to the photothermal properties and nonlinear absorption characteristics of V2CTx MXene presented herein demonstrate the application of photothermal effect-based polarization rotation for all-optical signal modulation. In our analysis, first, the nonlinear absorption coefficient of a V2CTx thin film was measured using an open-aperture z-scan technique. The estimated nonlinear absorption coefficient was approximately −9.26 × 103 cm/GW at 1560 nm. Next, density functional theory calculations were conducted to determine the electronic band structure and optical absorption spectrum of V2CTx MXene. Following this, photothermal properties of V2CTx MXene were characterized in terms of the photothermal effect-based polarization rotation using 980 nm control and 1550 nm probe beams. The power-dependent temperature slope and conversion efficiency of the phase shift were measured to be 0.15 °C/mW and 0.02 π/mW, respectively. Finally, an all-optical modulator was experimentally implemented using the photothermal effect-based polarization rotation. The rise and fall time constants were estimated to be approximately 311 and 321 μs, respectively.

Original languageEnglish
Article number113198
JournalOptical Materials
Volume134
DOIs
StatePublished - Dec 2022

Keywords

  • 2D materials
  • MXene
  • Nonlinear absorption
  • Optical modulation
  • Photothermal effect

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