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Open AccessArticle
Femtosecond Third-Order Nonlinear Electronic Responses of 2D Metallic NbSe2
by
Cecília L. A. V. Campos
Cecília L. A. V. Campos 1,*,
Igor Gonçalves
Igor Gonçalves 1,
Jessica E. Q. Bautista
Jessica E. Q. Bautista 1,
Alyson Carvalho
Alyson Carvalho 1,
Ali M. Jawaid
Ali M. Jawaid 2,
Robert Busch
Robert Busch 2,
Richard Vaia
Richard Vaia
Dr. Richard A. Vaia is the Chief Scientist for the Materials and Manufacturing Directorate at the he [...]
Dr. Richard A. Vaia is the Chief Scientist for the Materials and Manufacturing Directorate at the Air Force Research Laboratory, where he leads internal and external research and development, fostering a culture of innovation and establishing strategic partnerships. Rich received his PhD (1995) in Materials Science and Engineering from Cornell University and separated from the USAF as a Captain in 1999. He has published more than 250 articles on nanomaterials, with honors including membership in the National Academy of Engineering and Fellow of the Materials Research Society, American Chemical Society, and American Physics Society.
2 and
Anderson S. L. Gomes
Anderson S. L. Gomes
Dr. Anderson S. L. Gomes is a professor of physics at
Universidade Federal de Pernambuco (UFPE), He [...]
Dr. Anderson S. L. Gomes is a professor of physics at
Universidade Federal de Pernambuco (UFPE), Brazil. He obtained his PhD in
physics from Imperial College of Science, Technology and Medicine (1986) and
completed his postdoc at Brown University (1992). His research interests are in
nonlinear optics, nanophotonics, and biophotonics. He has co-authored more than
300 scientific publications, is a Fellow of OPTICA and is a member of the
Brazilian Academy of Sciences, The World Academy of Sciences (TWAS), and the Brazilian Order of Scientific Merit.
1,*
1
Departamento de Física, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil
2
Materials and Manufacturing Directorate, Air Force Research Laboratories, Wright-Patterson AFB, OH 45433, USA
*
Authors to whom correspondence should be addressed.
Photonics 2024, 11(10), 930; https://doi.org/10.3390/photonics11100930 (registering DOI)
Submission received: 27 August 2024
/
Revised: 26 September 2024
/
Accepted: 27 September 2024
/
Published: 30 September 2024
Abstract
This manuscript reports on the third-order nonlinear optical responses of two-dimensional metallic NbSe2 suspended in acetonitrile (ACN). The standard Z-scan technique was employed with 190 fs optical pulses at 790 nm, a repetition rate of 750 Hz, and an intensity ranging from 30 to 300 GW/cm2. A self-focusing nonlinear refractive index (NLR), cm2/W, and a nonlinear absorption (NLA) coefficient, cm/GW, were measured, with the NLA arising from a two-photon process. Aiming to further understand the material’s electronic nonlinearities, we also employed the Optical Kerr Gate (OKG) to evaluate the material’s time response and measure the NLR coefficient in an optical intensity range different from the one used in the Z-scan. For optical pulses of 170 fs at 800 nm and a repetition rate of 76 MHz, the modulus of the NLR coefficient was measured to be cm2/W for intensities up to 650 MW/cm2, with the material’s time response limited by the pulse duration. The ultrafast time response and electronic optical nonlinearities are explained based on the material’s 2D structure.
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MDPI and ACS Style
Campos, C.L.A.V.; Gonçalves, I.; Bautista, J.E.Q.; Carvalho, A.; Jawaid, A.M.; Busch, R.; Vaia, R.; Gomes, A.S.L.
Femtosecond Third-Order Nonlinear Electronic Responses of 2D Metallic NbSe2. Photonics 2024, 11, 930.
https://doi.org/10.3390/photonics11100930
AMA Style
Campos CLAV, Gonçalves I, Bautista JEQ, Carvalho A, Jawaid AM, Busch R, Vaia R, Gomes ASL.
Femtosecond Third-Order Nonlinear Electronic Responses of 2D Metallic NbSe2. Photonics. 2024; 11(10):930.
https://doi.org/10.3390/photonics11100930
Chicago/Turabian Style
Campos, Cecília L. A. V., Igor Gonçalves, Jessica E. Q. Bautista, Alyson Carvalho, Ali M. Jawaid, Robert Busch, Richard Vaia, and Anderson S. L. Gomes.
2024. "Femtosecond Third-Order Nonlinear Electronic Responses of 2D Metallic NbSe2" Photonics 11, no. 10: 930.
https://doi.org/10.3390/photonics11100930
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