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Al2O3介质薄膜与纳米Ag颗粒构成的复合结构，被应用于表面增强Raman散射探测实验中，其中Al2O3介质薄膜对纳米Ag颗粒的吸收谱及增强Raman散射光谱的影响被特别关注.该复合结构的光学特性表征出纳米Ag颗粒的偶极振荡特性.从光吸收谱中可以看到，其共振吸收谱随Al2O3介质薄膜厚度增加而在整个谱域上发生红移，表明纳米Ag颗粒的周围介电常数随Al2O3介质薄膜厚度的增加而增大.采用罗丹明6G作为探针原子，6个Raman特征峰的平均增益值作为表征表面增强Raman散射衬底增益程度的量度.实验结果表明,Al2O3介质薄膜层的引入提高了纳米Ag颗粒的衬底介电常数，并引起了散射共振的增强，从而使表面增强Raman散射强度提高.
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关键词:
- 纳米Ag薄膜 /
- 共振吸收 /
- 表面增强Raman散射 /
- 介电常数
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[2] ［2］Huang Q, Zhang X D, Wang S, Cao L R, Sun J, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 2731 (in Chinese) ［黄茜、张晓丹、王烁、曹丽冉、孙建、耿卫东、熊绍珍、赵颖 2009 物理学报 58 2731］
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[8] ［8］Feldstein M J, Keating C D, Liau Y H, Natan M J, Scherer N F 1997 J. Am. Chem. Soc. 119 6638
[9] ［9］Sajan D, Joe I H, Jayakumar V S 2006 J. Raman Spectrosc. 37 508
[10] ］Wu Q S, Zhao Y, Zhang C B, Li F 2005 Acta Phys. Sin. 54 1452 (in Chinese) ［吴青松、赵岩、张彩碚、李峰 2005 物理学报 54 1452
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[12] ］Imura K, Okamoto H, Hossain M K, Kitajima M 2006 Nano Lett. 6 2173
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[15] ］Meier M, Wokaun A, Vo-Dinh T 1985 J. Phys. Chem. 89 1843
[16] ］Huang Q, Wang J, Cao L R, Sun J, Zhang X D, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 1980 (in Chinese) ［黄茜、王京、曹丽冉、孙建、张晓丹、耿卫东、熊绍珍、赵颖 2009 物理学报 58 1980］
[17] ］Stair P C 2001 Curr. Opin. Solid St. M. 5 365
[18] ］Mie G 1908 Ann. Phys. 25 377
[19] ］Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[20] ］Link S, El-Sayed M A 1999 J. Phys. Chem. B 103 4212
[21] ］Xu G, Chen Y, Tazawa M, Jin P 2006 Appl. Phys. Lett. 88 043114
[22] ］Orendorff C J, Gole A, Sau T K, Murphy C J 2005 Anal. Chem. 77 3261
[23] ］Xu H 2004 Appl. Phys. Lett. 85 5980
[24] ］Prokes S M, Glembocki O J, Rendell R W, Ancona M G 2007 Appl. Phys. Lett. 90 093105
-
[1] ［1］Mishra Y K, Mohapatra S, Singhal R, Avasthi D K, Agarwal D C, Ogale S B 2008 Appl. Phys. Lett. 92 043107
[2] ［2］Huang Q, Zhang X D, Wang S, Cao L R, Sun J, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 2731 (in Chinese) ［黄茜、张晓丹、王烁、曹丽冉、孙建、耿卫东、熊绍珍、赵颖 2009 物理学报 58 2731］
[3] ［3］Xu G, Huang C M, Tazawa M, Jin P, Chen L H 2009 Opt. Comm. 282 896
[4] ［4］Wang T J, Lin W S 2006 Appl. Phys. Lett. 89 173903
[5] ［5］Haes A J, Zou S, Schatz G C, van Duyne R P 2004 J. Phys. Chem. B 108 109
[6] ［6］Nie S, Emory S R 1997 Science 275 1102
[7] ［7］Zhang Y, Gu C, Schwartzberg A M, Zhang J Z 2005 Appl. Phys. Lett. 87 123105
[8] ［8］Feldstein M J, Keating C D, Liau Y H, Natan M J, Scherer N F 1997 J. Am. Chem. Soc. 119 6638
[9] ［9］Sajan D, Joe I H, Jayakumar V S 2006 J. Raman Spectrosc. 37 508
[10] ］Wu Q S, Zhao Y, Zhang C B, Li F 2005 Acta Phys. Sin. 54 1452 (in Chinese) ［吴青松、赵岩、张彩碚、李峰 2005 物理学报 54 1452
[11] ］Prokes S M, Alexson D A, Glembocki O J, Park H D, Rendell R W 2009 Appl. Phys. Lett. 94 093105
[12] ］Imura K, Okamoto H, Hossain M K, Kitajima M 2006 Nano Lett. 6 2173
[13] ］Fang J X, Yi Y, Ding B J, Song X P 2008 Appl. Phys. Lett. 92 131115
[14] ］Weimer W A, Dyer M J 2001 Appl. Phys. Lett. 79 3164
[15] ］Meier M, Wokaun A, Vo-Dinh T 1985 J. Phys. Chem. 89 1843
[16] ］Huang Q, Wang J, Cao L R, Sun J, Zhang X D, Geng W D, Xiong S Z, Zhao Y 2009 Acta Phys. Sin. 58 1980 (in Chinese) ［黄茜、王京、曹丽冉、孙建、张晓丹、耿卫东、熊绍珍、赵颖 2009 物理学报 58 1980］
[17] ］Stair P C 2001 Curr. Opin. Solid St. M. 5 365
[18] ］Mie G 1908 Ann. Phys. 25 377
[19] ］Kelly K L, Coronado E, Zhao L L, Schatz G C 2003 J. Phys. Chem. B 107 668
[20] ］Link S, El-Sayed M A 1999 J. Phys. Chem. B 103 4212
[21] ］Xu G, Chen Y, Tazawa M, Jin P 2006 Appl. Phys. Lett. 88 043114
[22] ］Orendorff C J, Gole A, Sau T K, Murphy C J 2005 Anal. Chem. 77 3261
[23] ］Xu H 2004 Appl. Phys. Lett. 85 5980
[24] ］Prokes S M, Glembocki O J, Rendell R W, Ancona M G 2007 Appl. Phys. Lett. 90 093105
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