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

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. 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 (σ2PA) of ≈57 × 10-46cm4s-1photon-1. Also, by using UV-Vis absorption spectroscopy, the temperature coefficient of the bandgap (dEg/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 σ2PAcombined 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.
Original languageEnglish
Pages (from-to)828-835
Number of pages8
JournalAdvanced Optical Materials
DOIs
Publication statusPublished - 1 Jun 2015
Externally publishedYes

Fingerprint

Boron nitride
Nanosheets
boron nitrides
Photoluminescence
Optical properties
photoluminescence
optical properties
Energy gap
Temperature
Photonic devices
Optical materials
temperature
Graphite
biocompatibility
optical materials
Laser radiation
Ultraviolet spectroscopy
Absorption spectroscopy
Biocompatibility
absorption cross sections

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Kumbhakar, Pathik ; Kole, Arup Kanti ; Tiwary, Chandra Sekhar ; Biswas, Subrata ; Vinod, Soumya ; Taha-Tijerina, Jaime ; Chatterjee, Udit ; Ajayan, Pulickel M. / Nonlinear Optical Properties and Temperature-Dependent UV-Vis Absorption and Photoluminescence Emission in 2D Hexagonal Boron Nitride Nanosheets. In: Advanced Optical Materials. 2015 ; pp. 828-835.
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Nonlinear Optical Properties and Temperature-Dependent UV-Vis Absorption and Photoluminescence Emission in 2D Hexagonal Boron Nitride Nanosheets. / Kumbhakar, Pathik; Kole, Arup Kanti; Tiwary, Chandra Sekhar; Biswas, Subrata; Vinod, Soumya; Taha-Tijerina, Jaime; Chatterjee, Udit; Ajayan, Pulickel M.

In: Advanced Optical Materials, 01.06.2015, p. 828-835.

Research output: Contribution to journalArticle

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AU - Kumbhakar, Pathik

AU - Kole, Arup Kanti

AU - Tiwary, Chandra Sekhar

AU - Biswas, Subrata

AU - Vinod, Soumya

AU - Taha-Tijerina, Jaime

AU - Chatterjee, Udit

AU - Ajayan, Pulickel M.

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N2 - © 2015 WILEY-VCH Verlag GmbH & Co. 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 (σ2PA) of ≈57 × 10-46cm4s-1photon-1. Also, by using UV-Vis absorption spectroscopy, the temperature coefficient of the bandgap (dEg/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 σ2PAcombined 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.

AB - © 2015 WILEY-VCH Verlag GmbH & Co. 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 (σ2PA) of ≈57 × 10-46cm4s-1photon-1. Also, by using UV-Vis absorption spectroscopy, the temperature coefficient of the bandgap (dEg/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 σ2PAcombined 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.

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