ENHANCEMENT OF ZONE-FOLDING EFFECTS IN THE 2ND-ORDER RESPONSE OF THE [(SI)5/(GE)5]/(SI0.4GE0.6)(001) SUPERLATTICE

被引：6

作者：

GHAHRAMANI, E

SIPE, JE

机构：

[1] UNIV TORONTO,DEPT PHYS,TORONTO M5S 1A7,ONTARIO,CANADA

[2] UNIV TORONTO,ONTARIO LASER & LIGHTWAVE RES CTR,TORONTO M5S 1A7,ONTARIO,CANADA

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 18期

关键词：

D O I：

10.1063/1.109430

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have carried out a full band structure calculation of the second harmonic generation (SHG) coefficient and the linear response function of a [(Si)5/(Ge)5] superlattice (SLS) on a Si0.4Ge0.6 alloy substrate. Our calculation gives the first indication of the magnitude, frequency dependence, and anisotropy of the second order response in this SLS. The ratio of the features due to zone-folded transitions to those due to bulk-like transitions is an order of magnitude larger than the same ratio in the linear response. Yet these zone-folded effects are still very small. Nonetheless, the overall size of the SHG coefficient for this SLS is slightly larger than that of the corresponding SLS on a Si(001) substrate.

引用

页码：2245 / 2247

页数：3

共 19 条

[1]

GHAHRAMANI E, 1990, PHYS REV B, V42, P9193, DOI 10.1103/PhysRevB.42.9193.2

[2] FULL-BAND-STRUCTURE CALCULATION OF 1ST-HARMONIC, 2ND-HARMONIC, AND 3RD-HARMONIC OPTICAL-RESPONSE COEFFICIENTS OF ZNSE, ZNTE, AND CDTE [J].