中国物理B ›› 1994, Vol. 3 ›› Issue (11): 828-835.doi: 10.1088/1004-423X/3/11/005

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STUDY ON LIGHT LOCALIZATION OF ONE-DIMENSIONAL DISORDERED MULTILAYER

胡炜, 张有珑, 张道中, 李兆霖, 程丙英, 杨国桢   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1993-11-22 出版日期:1994-11-20 发布日期:1994-11-20

STUDY ON LIGHT LOCALIZATION OF ONE-DIMENSIONAL DISORDERED MULTILAYER

HU WEI (胡炜), ZHANG YOU-LONG (张有珑), ZHANG DAO-ZHONG (张道中), LI ZHAO-LIN (李兆霖), CHENG BING-YING (程丙英), YANG GUO-ZHEN (杨国桢)   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1993-11-22 Online:1994-11-20 Published:1994-11-20

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摘要： Antimonite and cryolite are used as the high and low refractive index coating materials to be evaporated alternately to the glass substrates. All cryolite layers have the same thickness d/4na, and the thickness of antimonite layers varies randomly around an average value d/4nb, with d=650nm, na and nb their refractive indices. Three kinds of multilayer are prepared, they possess the same degree of thickness disorder, but different total lengths, i.e., 10, 15 and 21 perioda. We measure the transmission and reflection spectrum after the light passing through these multilayers. The exponential intensity variation versus total length is experi-mentally demonstrated, and the light localization length is then obtained. Our experimental results can be fitted very well with the numerical simulation. Based on the measured and calculated localization length, the effects of phase coherent: Bragg reflection and Anderson localization are discussed.

Abstract: Antimonite and cryolite are used as the high and low refractive index coating materials to be evaporated alternately to the glass substrates. All cryolite layers have the same thickness d/4na, and the thickness of antimonite layers varies randomly around an average value d/4nb, with d=650nm, na and nb their refractive indices. Three kinds of multilayer are prepared, they possess the same degree of thickness disorder, but different total lengths, i.e., 10, 15 and 21 perioda. We measure the transmission and reflection spectrum after the light passing through these multilayers. The exponential intensity variation versus total length is experi-mentally demonstrated, and the light localization length is then obtained. Our experimental results can be fitted very well with the numerical simulation. Based on the measured and calculated localization length, the effects of phase coherent: Bragg reflection and Anderson localization are discussed.

中图分类号:  (Weak or Anderson localization)

  • 73.20.Fz
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 73.21.Ac (Multilayers)