Third-order nonlinear optical properties of porphyrazine, phthalocyanine and naphthalocyanine germanium derivatives:: Demonstrating the effect of π-conjugation length on third-order optical nonlinearity of two-dimensional molecules

被引:96
作者
Nalwa, HS
Hanack, M
Pawlowski, G
Engel, MK
机构
[1] Hitachi Ltd, Hitachi Res Lab, Hitachi, Ibaraki 3191292, Japan
[2] Univ Tubingen, Lehrstuhl Organ Chem 2, D-72076 Tubingen, Germany
[3] Kawamura Inst Chem Res, Sakura, Chiba 285, Japan
关键词
D O I
10.1016/S0301-0104(99)00145-7
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Optical and third-order nonlinear optical properties of germanium porphyrazine, phthalocyanine and naphthalocyanine derivatives have been measured in order to evaluate the effect of extended pi-electron conjugation on third-order optical nonlinearity. Third-order nonlinear optical susceptibilities chi((3)) Of thin films of trans-dihydroxy- 1,6,11,16-tetra(tert.butyl)porphyrazine germanium [t-Bu(4)PazGe(OH)(2)], trans-dihydroxy-tetra-(tert.butyl)phthalocyaninato germanium [(t-Bu(4)PcGe(OH)(2)] and naphthalocyanine germanium (GeNc) derivative measured by the third-harmonic generation technique are reported. A chi((3))(-3 omega; omega, omega, omega) value as high as 1.3 x 10(-11) esu at 1.65 mu m was observed for [t-Bu(4)PazGe(OH)(2)] thin films from a dominant three-photon resonance. A chi((3))(-3 omega; omega, omega, omega) value of 2.5 x 10(-11) esu and a chi((3))/alpha value of 1.65 x 10(-15) esu cm as figure of merit was observed for [t-Bu(4)PcGe(OH)(2)] thin films at 1.8 mu m. The chi((3)) values of germanium porphyrazine derivative have been compared with those of structurally related germanium phthalocyanine and naphthalocyanine analogues to evaluate the effect of extended pi-conjugation introduced through benzo substitution. A progressive red-shift in optical absorption peaks in the Q-band region and an increase in the third-order nonlinear optical susceptibility was noticed with sequential increase of benzo substitution from the porphyrazine to naphthalocyanine ring. The effect of benzo substitution as well as axial substitution on optical and third-order nonlinear optical properties has been discussed. Attempts have also been made to establish a correlation between third-order optical nonlinearity and photoconductivity of metallophthalocyanines in view of the present results. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:17 / 26
页数:10
相关论文
共 70 条
  • [61] SHIMURA Y, 1986, J ELECTROCHEM SOC, P239
  • [62] 3RD-ORDER OPTICAL NONLINEARITIES OF BIS(PHTHALOCYANINES)
    SHIRK, JS
    LINDLE, JR
    BARTOLI, FJ
    BOYLE, ME
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (14) : 5847 - 5852
  • [63] OFF-RESONANT 3RD-ORDER OPTICAL NONLINEARITIES OF METAL-SUBSTITUTED PHTHALOCYANINES
    SHIRK, JS
    LINDLE, JR
    BARTOLI, FJ
    HOFFMAN, CA
    KAFAFI, ZH
    SNOW, AW
    [J]. APPLIED PHYSICS LETTERS, 1989, 55 (13) : 1287 - 1288
  • [64] SATURATION OF THE HYPERPOLARIZABILITY OF OLIGOTHIOPHENES
    THIENPONT, H
    RIKKEN, GLJA
    MEIJER, EW
    TENHOEVE, W
    WYNBERG, H
    [J]. PHYSICAL REVIEW LETTERS, 1990, 65 (17) : 2141 - 2144
  • [65] TOKANO S, 1990, J IMAGING TECHNOL, V17, P46
  • [66] OPTICAL 3RD-HARMONIC GENERATION FROM POLYDIACETYLENE THIN-FILMS DEPOSITED BY VACUUM EVAPORATION
    TOMARU, S
    KUBODERA, K
    ZEMBUTSU, S
    TAKEDA, K
    HASEGAWA, M
    [J]. ELECTRONICS LETTERS, 1987, 23 (11) : 595 - 596
  • [67] MEASUREMENT OF THE 3RD-ORDER OPTICAL SUSCEPTIBILITY OF QUASI-2-DIMENSIONAL CONJUGATED DISKS - SILICON NAPHTHALOCYANINE
    WANG, NQ
    CAI, YM
    HEFLIN, JR
    GARITO, AF
    [J]. MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1990, 189 : 39 - 48
  • [68] Rigid rod conjugated polymers for nonlinear optics .2. Synthesis and characterization of phenylene-ethynylene oligomers
    Wautelet, P
    Moroni, M
    Oswald, L
    LeMoigne, J
    Pham, A
    Bigot, JY
    Luzzati, S
    [J]. MACROMOLECULES, 1996, 29 (01) : 446 - 455
  • [69] NONLINEAR-OPTICAL PROCESSES IN LOWER-DIMENSIONAL CONJUGATED STRUCTURES
    WU, JW
    HEFLIN, JR
    NORWOOD, RA
    WONG, KY
    ZAMANIKHAMIRI, O
    GARITO, AF
    KALYANARAMAN, P
    SOUNIK, J
    [J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1989, 6 (04) : 707 - 720
  • [70] YAMASHITA A, 1996, 5 S INT MAT, P86