Nonlinear Optical Properties and Temperature-Dependent UV-Vis Absorption and Photoluminescence Emission in 2D Hexagonal Boron Nitride Nanosheets

Pathik Kumbhakar, Arup Kanti Kole, Chandra Sekhar Tiwary, Subrata Biswas, Soumya Vinod, Jaime Taha-Tijerina, Udit Chatterjee, Pulickel M. Ajayan

Resultado de la investigaciónrevisión exhaustiva

74 Citas (Scopus)

Resumen

Recently, a lot of interest has been centred on the optical properties of hexagonal boron nitride (h-BN), which has a similar lattice structure to graphene. Interestingly, h-BN has a wide bandgap and is biocompatible, so it has potential applications in multiphoton bioimaging, if it can exhibit large nonlinear optical (NLO) properties. However, extensive investigation into the NLO properties of h-BN have not been done so far. Here, NLO properties of 2D h-BN nanosheets (BNNS) are reported for the first time, using 1064-nm NIR laser radiation with a pulse duration of 10 ns using the Z-scan technique. The reverse saturable absorption occurs in aqueous colloidal solutions of BNNS with a very large two-photon absorption cross section (σ 2PA) of ≈57 × 10 -46 cm 4 s -1 photon -1. Also, by using UV-Vis absorption spectroscopy, the temperature coefficient of the bandgap (dE g/dT) of BNNS is determined to be 5.9 meV K -1. Further defect-induced photoluminescence emission in the UV region is obtained in the 283-303 K temperature range, under excitations of different wavelengths. The present report of large σ 2PA combined with stability and biocompatibility could open up new possibilities for the application of BNNS as a potential optical material for multiphoton bioimaging and advanced photonic devices.

Idioma originalEnglish
Páginas (desde-hasta)828-835
Número de páginas8
PublicaciónAdvanced Optical Materials
Volumen3
N.º6
DOI
EstadoPublished - 1 jun 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Materiales electrónicos, ópticos y magnéticos
  • Óptica y física atómica y molecular

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