skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Third-order nonlinear optical properties of bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper

Abstract

Bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper (BCDT) was synthesized and its third-order optical nonlinearity was characterized using picosecond Z-scan at 1064 nm. The Z-scan spectra reveal a large negative nonlinear refraction coefficient n {sub 2} as high as 4.0 x 10{sup -18} m{sup 2}/W and a slight two-photon absorption {beta}, which is determined to be 3.4 x 10{sup -12} m/W. The molecular second-order hyperpolarizability {gamma} was calculated to be 6.5 x 10{sup -32} esu. All these results suggest that this material has potential for the application of all-optical switching.

Authors:
 [1];  [2];  [3];  [2];  [3];  [3]
  1. Department of Optics, Shandong University, Jinan 250100 (China). E-mail: sunxb@sdu.edu.cn
  2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China)
  3. Department of Optics, Shandong University, Jinan 250100 (China)
Publication Date:
OSTI Identifier:
20891606
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 41; Journal Issue: 1; Other Information: DOI: 10.1016/j.materresbull.2005.07.021; PII: S0025-5408(05)00277-1; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; CHEMICAL PREPARATION; COPPER; OPTICAL PROPERTIES; ORGANOMETALLIC COMPOUNDS; PHOTONS; REFRACTION; SPECTRA

Citation Formats

Sun, X.B., Wang, X.Q., Ren, Q., Zhang, G.H., Yang, H.L., and Feng, L.. Third-order nonlinear optical properties of bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.07.021.
Sun, X.B., Wang, X.Q., Ren, Q., Zhang, G.H., Yang, H.L., & Feng, L.. Third-order nonlinear optical properties of bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper. United States. doi:10.1016/j.materresbull.2005.07.021.
Sun, X.B., Wang, X.Q., Ren, Q., Zhang, G.H., Yang, H.L., and Feng, L.. Thu . "Third-order nonlinear optical properties of bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper". United States. doi:10.1016/j.materresbull.2005.07.021.
@article{osti_20891606,
title = {Third-order nonlinear optical properties of bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper},
author = {Sun, X.B. and Wang, X.Q. and Ren, Q. and Zhang, G.H. and Yang, H.L. and Feng, L.},
abstractNote = {Bis(tetrabutylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper (BCDT) was synthesized and its third-order optical nonlinearity was characterized using picosecond Z-scan at 1064 nm. The Z-scan spectra reveal a large negative nonlinear refraction coefficient n {sub 2} as high as 4.0 x 10{sup -18} m{sup 2}/W and a slight two-photon absorption {beta}, which is determined to be 3.4 x 10{sup -12} m/W. The molecular second-order hyperpolarizability {gamma} was calculated to be 6.5 x 10{sup -32} esu. All these results suggest that this material has potential for the application of all-optical switching.},
doi = {10.1016/j.materresbull.2005.07.021},
journal = {Materials Research Bulletin},
number = 1,
volume = 41,
place = {United States},
year = {Thu Jan 05 00:00:00 EST 2006},
month = {Thu Jan 05 00:00:00 EST 2006}
}
  • The preparation and characterization of bis(tetraethylammonium)bis(2-thioxo-1,3-dithiole-4,5-dithiolato) cuprate(II), (I), are described. The thermal stability and thermal decomposition of (I) are studied both in air and under nitrogen flux. The nonlinear optical properties of (I) at 532 and 1064 nm are investigated by using the Z-scan technique with pulses of picoseconds duration. (I) exhibits self-defocusing effects at both wavelengths, strong saturable absorption at 532 nm and two-photon absorption at 1064 nm. The second molecular hyperpolarizability {gamma} of (I) at 532 nm was estimated to be as high as 5.17 x 10{sup -31} esu. The origins have been analyzed and interpreted on themore » basis of crystal structure.« less
  • The binuclear complex anion in [(C6H5)(6)P2N](2)[(C3S5)Ni(C2S4)Ni(C3S5)], conventionally abbreviated (PPN)(2)[(dmit)Ni(tto)Ni(dmit)], where PPN is bis(triphenylphosphoranylidene)ammonium, dmit is 2-thioxo-1,3-dithiole-4,5-dithiolate and tto is tetrathiaoxalate, is centrosymmetric and essentially planar, except for a small twist of 2.7(1)degrees at the Ni centers. The bond lengths [average Ni-S distance 2.166(8) Angstrom] and angles are comparable to those reported elsewhere for other salts of the component ions. The crystal packing and the charge state of the complex anion are not favorable for electrical conduction. The binuclear complex anion was synthesized by a simpler method than that published previously.
  • The pressure-temperature phase diagram of the quasi-one-dimensional molecular superconductor TTF (Ni(dmit){sub 2}){sub 2} has been carefully determined by ac resistivity measurements up to 14 kbar. Increasing pressures induce electronic phase transitions between a high-temperature metal and successive, metallic or semimetallic, semiconducting and reentrant superconducting ground states. This unusual phase diagram is compared with that of TTF (Pd(dmit){sub 2}){sub 2}. It is discussed in connection with ambient-pressure charge-density-wave (CDW) instabilities, the wave vector of which can be well accounted for by an original conduction-band structure involving both the highest occupied molecular orbitals and the lowest unoccupied molecular orbitals of the acceptormore » slabs. It is confirmed that the superconducting temperature increases slowly with increasing pressure. It is suggested that the superconductivity coexists with a high-temperature CDW instability and is in weak competition with low-temperature CDW fluctuations; these CDW's affect different parts of the Fermi surface.« less
  • Electrochemical oxidation of the metal-organic complex, nickel(II) - bis(1,3 - dithiole - 2 - thione - 4,5 - diselenolate) (Ni(dsit){sub 2}){sup 2{minus}}, yields highly conducting salts, in which the stoichiometry and packing arrangement depends critically on the site of the counter-cations incorporated. Smaller counter-cations, e.g., tetramethylammonium and tetramethylphosphonium ions, yield salts with a 1:2 cation N:(dsit){sub 2} stoichiometry, while the larger tetraethylammonium ion yields a salt with 2:2 stoichiometry. In both these salts, the Ni(dsit){sub 2} units occur as tightly bound dimers, in which coordination geometry of nickel is a unique, but not unprecedented square-pyramidal type. Moreover, the packing arrangementmore » of (Ni(dsit){sub 2}){sub 2} dimer units in both (Me{sub 4}N) (Ni(dsit){sub 2}){sub 2} and (Me{sub 4}P) (Ni(dsit){sub 2}){sub 2} is {kappa}-type, similar to that found in the organic superconductor with the highest-known T{sub c} (10.4 K), {kappa}-(BEDT-TTF){sub 2}Cu(NCS){sub 2}. Both these salts possess good room temperature conductivities ({sigma}{sub rt} = 36 and 19 S {center dot} cm{sup {minus}1} respectively), but the temperature dependence of their conductivities is characteristic of semiconductors with small bandgaps (E{sub g} = 0.11 and 0.13 eV respectively). The 2:2 salt (Et{sub 4}N){sub 2}(Ni(dsit){sub 2}){sub 2}, on the other hand, has a substantially lower room temperature conductivity, about six orders of magnitude smaller than that of the 1:2 salts. 19 refs., 3 figs., 3 tabs.« less
  • New precursors to potentially conductive noninteger oxidation state (NIOS) compounds based on metal complexes [ML{sub 2}]{sup n{minus}} [M = Ni, Pd, Pt; L = 5,6-dihydro-1,4-dithiin-2,3-dithiolato (dddt{sup 2{minus}}), 5,7-dihydro-1,4,6-trithiin-2,3-dithiolato (dtdt{sup 2{minus}}), and 2-thioxo-1,3-dithiole-4,5-dithiolate (dmit{sup 2{minus}}); n=2, 1, 0] have been investigated. The electronic structure of (SMeEt{sub 2})[Pd(dmit){sub 2}]{sub 2} (7) and the possible origin of the metal-insulator transition at 150 K are discussed on the basis of tight-binding band structure calculations.