Quantum confinement of E1 and E2 transitions in Ge quantum dots embedded in an Al2O3 or an AlN matrix

被引:25
|
作者
Teng, CW [1 ]
Muth, JF
Kolbas, RM
Hassan, KM
Sharma, AK
Kvit, A
Narayan, J
机构
[1] N Carolina State Univ, Dept Elect & Comp Engn, Raleigh, NC 27695 USA
[2] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA
关键词
D O I
10.1063/1.125650
中图分类号
O59 [应用物理学];
学科分类号
摘要
Alternating layers of Ge quantum dots embedded in either Al2O3 or AlN matrices were deposited on sapphire substrates by pulsed-laser deposition. The characteristics of the dots are shown to be independent of the surrounding matrix. The dots size (73, 130, 160, and 260 Angstrom +/- 5%) was controlled by the laser energy density and deposition time, and was characterized by high-resolution transmission electron microscopy. The dots were single crystalline with no apparent GeOx interfacial layers. Transmission spectroscopy at room temperature and 77 K was used to probe the above-band-edge absorption of the Ge nanodots. The spectral positions of both E-1/E-1 + Delta(1) and E-2 transitions were found to shift to higher energy in the absorption spectra with decreasing nanodot sizes. This indicates that strong quantum-confinement effect permits the optical properties of Ge dots to be modified in a controlled manner. (C) 2000 American Institute of Physics. [S0003-6951(00)00401-0].
引用
收藏
页码:43 / 45
页数:3
相关论文
共 50 条
  • [41] Energies and radiative transitions (E1, E2, and M1) for hydrogen-like thorium
    Urer, G.
    CANADIAN JOURNAL OF PHYSICS, 2016, 94 (11) : 1138 - 1141
  • [42] PHAGE TYPING SET FOR E1, E2, E3, AND E4 SALMONELLAE
    GERSHMAN, M
    JOURNAL OF CLINICAL MICROBIOLOGY, 1976, 4 (02) : 196 - 200
  • [43] THE WEIERSTRASS MEAN .1. THE PERIODS OF P(Z/E1,E2,E3)
    TODD, J
    NUMERISCHE MATHEMATIK, 1990, 57 (08) : 737 - 746
  • [44] Different quantum behavior of the E(1) and E(2) spectral structures in Ge nanocrystals
    Tognini, P
    Andreani, LC
    Geddo, M
    Stella, A
    Cheyssac, P
    Kofman, R
    Migliori, A
    PHYSICAL REVIEW B, 1996, 53 (11): : 6992 - 6995
  • [45] Optical properties of exciton confinement in spherical ZnO quantum dots embedded in SiO2 matrix
    Dallali, Lobna
    Jaziri, Sihem
    El Haskouri, Jamal
    Amoros, Pedro
    SUPERLATTICES AND MICROSTRUCTURES, 2009, 46 (06) : 907 - 916
  • [46] MEASUREMENT OF E2 AND E1 STRENGTH IN AL-27 WITH MG-26 (P, GAMMA O) AL-27
    KURJAN, PM
    FISHER, GA
    CALARCO, JR
    KUHLMANN, E
    GLAVISH, HF
    HANNA, SS
    BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1973, 18 (12): : 1601 - 1601
  • [47] Structure and electric property comparison between Ge nanoclusters embedded in Al2O3 and Al2O3/ZrO2
    Weili Liu
    Qing Wan
    Chenglu Lin
    Metals and Materials International, 2004, 10 : 161 - 165
  • [48] Structure and electric property comparison between Ge nanoclusters embedded in Al2O3 and Al2O3/ZrO2
    Liu, WL
    Wan, Q
    Lin, CL
    METALS AND MATERIALS INTERNATIONAL, 2004, 10 (02) : 161 - 165
  • [49] Structural and optical properties of Ge nanocrystals embedded in Al2O3
    Caldelas, P.
    Rolo, A. G.
    Chahboun, A.
    Foss, S.
    Levichev, S.
    Finstad, T. G.
    Gomes, M. J. M.
    Conde, O.
    JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 2008, 8 (02) : 572 - 576
  • [50] Controlling fluorescence of a nano-Al2O3 film enabled by CdSe quantum dots on CdSe/Al2O3 heterojunctions
    Bai, Zhongchen
    Chang, Mengyu
    Peng, Man
    Liu, Pengcheng
    Lu, Anjiang
    Zhang, Zhengping
    Qin, Shuijie
    JOURNAL OF LUMINESCENCE, 2019, 215