Logo image
Back
Extraordinary Nonlinear Optical Interaction from Strained Nanostructures in van der Waals CuInP2S6
Journal article   Peer reviewed

Extraordinary Nonlinear Optical Interaction from Strained Nanostructures in van der Waals CuInP2S6

Sharidya Rahman, Tanju Yildirim, Mike Tebyetekerwa, Ahmed Raza Khan and Yuerui Lu
ACS nano, Vol.16(9), pp.13959-13968
27/09/2022
DOI: https://doi.org/10.1021/acsnano.2c03294
PMID: 35980379

Metrics

15 Record Views
36 Times Cited - Web of Science

Abstract

Nanoengineering Wrinkled nanostructures Strain induction Massive second harmonics Dipole manipulation Dielectric Anisotropy
Local strain engineering and structural modification of 2D materials furnish benevolent control over their optoelectronic properties and provide an exciting approach to tune light-matter interaction in layered materials. Application of strain at the nanoscale is typically obtained through permanently deformed nanostructures such as nanowrinkles, which yield large band gap modulation, photoluminescence enhancement, and surface potential. Ultrathin transition metal dichalcogenides (TMDs) have been greatly analyzed for such purposes. Herein, we extend strain-induced nanoengineering to an emerging 2D material, CuInP2S6 (CIPS), and visualize extraordinary control over nonlinear light-matter interaction. Wrinkle nanostructures exhibit similar to 160-fold enhancement in second harmonic generation (SHG) compared to unstrained regions, which is additionally influenced by a change in the dielectric environment. The SHG enhancement was significantly modulated by the percentage of applied strain which was numerically estimated. Furthermore, polarization-dependent SHG revealed quenching and enhancement in the parallel and perpendicular directions, respectively, due to the direction of the compressive vector. Our work provides an important advancement in controlling optoelectronic properties beyond TMDs for imminent applications in flexible electronics.

Details

Logo image