Surface and interface optical waves in superlattices: Transverse electric localized and resonant modes

被引:26
作者
Bah, ML [1 ]
Akjouj, A [1 ]
ElBoudouti, EH [1 ]
DjafariRouhani, B [1 ]
Dobrzynski, L [1 ]
机构
[1] UNIV LILLE 1,CNRS D0801,EDI LAB DYNAM & STRUCT MAT MOL,UNITE PHYS,F-59655 VILLENEUVE DASCQ,FRANCE
关键词
D O I
10.1088/0953-8984/8/23/010
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We investigate the existence and behaviour of localized and resonant optical waves associated with the surface of a semi-infinite superlattice or its interface with a substrate, considering the case of transverse electric modes. In this paper, we present an analytic determination of the response function (Green function) for a semi-infinite superlattice with or without a cap layer, and for a superlattice in contact with a substrate. This calculation enables us to obtain both local and total densities of states as functions of the frequency omega and the wavevector k(parallel to) (parallel to the interfaces). Besides the surface and interface localized modes which occur as delta peaks inside the gaps, one can also obtain resonant states as well defined peaks of the density of states inside the bulk bands of the superlattice. In particular, we emphasize the different types of mode induced by a cap layer. In addition, we show that the creation of a semi-infinite superlattice gives rise to delta peaks of weight -1/4 in the density of states at every edge of the superlattice bulk bands.
引用
收藏
页码:4171 / 4188
页数:18
相关论文
共 33 条
[1]  
AKJOUJ A, 1994, ANN CHIM-SCI MAT, V19, P465
[2]   SURFACE AND INTERFACE S-POLARIZED OPTICAL WAVES IN SUPERLATTICES [J].
AKJOUJ, A ;
BAH, ML ;
ELBOUDOUTI, EH ;
DJAFARIROUHANI, B ;
DOBRZYNSKI, L .
VACUUM, 1995, 46 (5-6) :621-624
[3]   GENERAL LINEAR RESPONSE THEORY OF POLARITONS IN BINARY SUPERLATTICES [J].
BABIKER, M ;
CONSTANTINOU, NC ;
COTTAM, MG .
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1987, 20 (28) :4581-4596
[4]   THE INFLUENCE OF CAPPING LAYERS ON SURFACE PHONON POLARITONS IN SUPERLATTICES [J].
BAH, ML ;
AKJOUJ, A ;
ELBOUDOUTI, EH ;
DJAFARIROUHANI, B ;
DOBRZYNSKI, L .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1995, 7 (18) :3445-3452
[5]  
BAH ML, 1992, SURF SCI REP, V16, P95, DOI 10.1016/0167-5729(92)90010-9
[6]   COLLECTIVE EXCITATIONS OF SEMI-INFINITE SUPERLATTICE STRUCTURES - SURFACE-PLASMONS, BULK PLASMONS, AND THE ELECTRON-ENERGY-LOSS SPECTRUM [J].
CAMLEY, RE ;
MILLS, DL .
PHYSICAL REVIEW B, 1984, 29 (04) :1695-1706
[7]   TRANSVERSE ELASTIC-WAVES IN PERIODICALLY LAYERED INFINITE AND SEMI-INFINITE MEDIA [J].
CAMLEY, RE ;
DJAFARIROUHANI, B ;
DOBRZYNSKI, L ;
MARADUDIN, AA .
PHYSICAL REVIEW B, 1983, 27 (12) :7318-7329
[8]   BULK AND SURFACE-PLASMON MODES IN A SUPERLATTICE OF ALTERNATING LAYERED ELECTRON GASES [J].
CONSTANTINOU, NC ;
COTTAM, MG .
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1986, 19 (05) :739-747
[9]  
COTTAM MG, 1986, SURFACE EXCITATIONS, V9, P1
[10]   POLARITONS IN SEMICONDUCTOR MULTILAYERED MATERIALS [J].
DEREUX, A ;
VIGNERON, JP ;
LAMBIN, P ;
LUCAS, AA .
PHYSICAL REVIEW B, 1988, 38 (08) :5438-5452