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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

New nonlinear optical crystal of rhodamine 590 acid phthalate

Author

  • Sesha Bamini Nariyangadu
  • Tenzin Choedak
  • Ezekiel Joy Padma Malar
  • Junsheng Chen
  • Erling Thyrhaug
  • Pushpendra Kumar
  • Jinming Zhou
  • Vidyalakshmi Yechuri
  • Suman Kalyan Pal
  • Sven Lidin
  • Kejalakshmy Namassivayane Thangadhorai
  • Khadga J. Karki
  • Tönu Pullerits

Summary, in English

The synthesis and crystal structure of rhodamine 590 acid phthalate (RhAP) have been reported. This novel solid-state rhodamine derivative not only has a longer fluorescence lifetime compared to rhodamine solid-state matrixes where emission is quenched but also possesses strong nonlinear optical characteristics. The static and dynamic first- and second-order hyperpolarizabilities were calculated using the time-dependent density functional theory at the B3LYP/6-31+G∗ level. The computed static values of β and γof RhAP by the X-ray diffraction (XRD) structure were 31.9 × 10-30 and 199.0 × 10-36 esu, respectively. These values were about 62 times larger than the corresponding values in urea, an already well-known nonlinear optical material. The second-order hyperpolarizability of the compound was determined experimentally by measuring the two-photon absorption cross section using intensity-modulated light fields. The reported compound, excitable at near-infrared, exhibited frequency upconversion with the two-photon absorption coefficient enhanced by two orders of magnitude compared to that of the dye solution. Hosting the dye in the solid, at high concentrations, exploits the nonlinearity of the dye itself as well as results in significant excitonic effects including formation of broad exciton band and superradiance.

Department/s

  • Chemical Physics
  • Production and Materials Engineering
  • Centre for Analysis and Synthesis
  • NanoLund: Center for Nanoscience
  • eSSENCE: The e-Science Collaboration

Publishing year

2020

Language

English

Pages

20863-20873

Publication/Series

ACS Omega

Volume

5

Issue

33

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Theoretical Chemistry
  • Natural Sciences
  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 2470-1343