Nonlinear Optical Properties and Temperature Dependent Photoluminescence in hBN-GO Heterostructure 2D Material

Abstract

Recently, there has been a renaissance in theoretical and experimental studies on 2D heterostructures of two 2D wonder materials, namely graphene and hexagonal boron nitride (hBN) having plethora of application potentials in fundamental research as well as in developments of new technological devices. However, the nonlinear optical (NLO) property of hexagonal boron nitride nanosheets−graphene oxide (BNNS−GO) heterostructure has hitherto remained unexplored. Here, in this work NLO properties of BNNS−GO have been reported, for the first time, in the visible region by Z-scan technique in nanosecond regime. Nonlinear absorption coefficient (β 2PA ) and third order nonlinear susceptibility (χ 3 ) of BNNS−GO have been found to be enhanced significantly by 13.4% and 21.7%, respectively in compared to those of bare BNNS. The synthesized heterostructure is showing a superior optical limiting property as compared to that of bare BNNS. The change in polarizabilities of GO sheets with the insertion of hBN in its framework, formation of donor−acceptor pair and bandgap narrowing effects have caused the enhancement in NLO properties of BNNS−GO heterostructure. Temperature dependent photoluminescence (PL) of BNNS−GO have been conducted in 278−303 K temperature range and observed Arrhenius type variation of PL intensity with temperature. Thus, it is envisioned that this work will open new vistas of applications of 2D BNNS−GO heterostructure materials in developing photonic safety devices of eye to be used in military and in other industries.

2D Layered Graphene Oxide Films Integrated with Micro‐Ring Resonators for Enhanced Nonlinear Optics

“…[ 27,40 ] We also note that the Kerr nonlinearity of GO and GO nanocomposite has been studied in refs. [ 61–63 ] via the Z‐scan method, with the measured n 2 being lower than those in Table 2, possibly due to their samples being dispersed in solutions in contrast to solid films in our case. The high n 2 of GO films highlights their strong Kerr nonlinearity for not only FWM but also other third‐order (χ (3) ) nonlinear processes such as third harmonic generation, self‐phase modulation, and cross‐phase modulation.…”

The Optical Properties and Plasmonics of Anisotropic 2D Materials

“…Nonlinear optical properties have been widely investigated in 2D materials, such as TMDCs and hBN. Kumbhakar et al studied the multiphoton absorption properties of hBN by the z ‐scan technique, and later reported a significant enhancement in hBN–graphene oxide heterostructure compared with the bare hBN . Second‐harmonic generation (SHG) is a typical second‐order nonlinear optical process, which has been widely observed in 2D materials, such as noncentrosymmetric TMDCs and hBN, while for BP, SHG is absent due to its centrosymmetric crystal structure.…”

All‐Inorganic Transparent Composite Materials for Optical Limiting

“…In recent years, low‐dimensional nonlinear materials have become a research hotspot. Various types of low‐dimensional nonlinear materials with improved nonlinear responses have been reported; these materials include TiS 2 layers,23 hexagonal BN nanosheets,24,25 graphene‐based materials,26–28 and 1D CdS29 and CdTe30 quantum dots. In addition, inorganic glass and their derived composites have attracted considerable interest as nonlinear optical limiting material candidates due to their stable chemical and physical properties 31–33.…”