Characteristic lengthscales of step bunching in KDP crystal growth: in situ differential phase-shifting interferometry study

被引:53
作者
Booth, NA [1 ]
Chernov, AA
Vekilov, PG
机构
[1] Univ Houston, Dept Chem Engn, Houston, TX 77204 USA
[2] Univ Space Res Assoc, Huntsville, AL 35806 USA
关键词
crystal morphology; interfaces; growth from solutions; phosphates; nonlinear optic materials;
D O I
10.1016/S0022-0248(01)02101-7
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
We have developed a real-time phase-shifting interferometer capable of imaging of interfacial morphology with a depth resolution of similar to 25 Angstrom and lateral resolution of similar to 0.5 mum across a field of view of 2 x 2 mm(2). The method employs a phase-shifting algorithm employing five interferograms and image processing that yield a three dimensional digital representation of the surface relief. The time resolution of imaging is 0.1 s. This method is applied in situ to the (1 0 1) face of potassium dihydrogen phosphate crystals growing from an aqueous solution. We image the formation and evolution of solution-flow induced step bunches and determine their characteristic wavelength to be lambda(c) = 45 mum. This wavelength is within the range predicted by a stability theory based on balance between the diffusion interaction between steps and capillarity. The found value suggests that step-step interactions are the likely major factor for instability. (C) 2002 Published by Elsevier Science B.V.
引用
收藏
页码:1818 / 1824
页数:7
相关论文
共 23 条
  • [1] MORPHOLOGICAL INSTABILITY OF A TERRACE EDGE DURING STEP-FLOW GROWTH
    BALES, GS
    ZANGWILL, A
    [J]. PHYSICAL REVIEW B, 1990, 41 (09): : 5500 - 5508
  • [2] BILLIA H, 1993, HDB CRYSTAL GROWTH, P899
  • [3] BOOTH N, 2001, UNPUB REV SCI INSTRU
  • [4] Caroli B., 1992, SOLIDS FAR EQUILIBRI, P155
  • [5] Chernov A. A., 1986, Soviet Physics - Crystallography, V31, P705
  • [6] Chernov A.A., 1961, Sov. Phys. Usp, V4, DOI [10.1070/PU1961v004n01ABEH003328, DOI 10.1070/PU1961V004N01ABEH003328]
  • [7] HOW DOES THE FLOW WITHIN THE BOUNDARY-LAYER INFLUENCE MORPHOLOGICAL STABILITY OF A VICINAL FACE
    CHERNOV, AA
    [J]. JOURNAL OF CRYSTAL GROWTH, 1992, 118 (3-4) : 333 - 347
  • [8] MORPHOLOGICAL STABILITY OF A VICINAL FACE INDUCED BY STEP FLOW
    CHERNOV, AA
    CORIELL, SR
    MURRAY, BT
    [J]. JOURNAL OF CRYSTAL GROWTH, 1993, 132 (3-4) : 405 - 413
  • [9] SOLUTION GROWTH-KINETICS AND MECHANISM - PRISMATIC FACE OF ADP
    CHERNOV, AA
    RASHKOVICH, LN
    MKRTCHAN, AA
    [J]. JOURNAL OF CRYSTAL GROWTH, 1986, 74 (01) : 101 - 112
  • [10] Step bunching on a vicinal face of a crystal growing in a flowing solution
    Coriell, SR
    Murray, BT
    Chernov, AA
    McFadden, GB
    [J]. JOURNAL OF CRYSTAL GROWTH, 1996, 169 (04) : 773 - 785