金纳米旋转椭球的光吸收和散射特性优化 
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Optimization of Light Absorption and Scattering Properties of Gold Nanospheroids
1 新疆师范大学物理与电子工程学院, 新疆 乌鲁木齐 830054
2 新疆师范大学新型光源与微纳光学重点实验室, 新疆 乌鲁木齐 830054
图 & 表
图 1. 金纳米旋转椭球的几何模型
Fig. 1. Geometric model of gold nanospheroid
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图 2. 金纳米旋转椭球的长半轴对体积吸收系数和体积散射系数光谱的影响。(a)体积吸收系数αabs;(b)体积散射系数αsca
Fig. 2. Effect of major semi-axis on spectra of volume absorption coefficient and volume scattering coefficient of gold nanospheroids. (a)Volume absorption coefficient αabs; (b) volume scattering coefficient αsca
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图 3. 金纳米旋转椭球的短半轴对体积吸收系数和体积散射系数光谱的影响。(a)体积吸收系数αabs;(b)体积散射系数αsca
Fig. 3. Effect of minor semi-axis on spectra of volume absorption coefficient and volume scattering coefficient of gold nanospheroids. (a)Volume absorption coefficient αabs; (b) volume scattering coefficient αsca
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图 4. 金纳米旋转椭球吸收共振峰位置和强度随短半轴的变化。(a)吸收共振峰位置;(b)吸收共振峰强度
Fig. 4. Position and intensity of absorption resonance peak of gold nanospheroids varying with minor semi-axis. (a) Position of absorption resonance peak; (b) intensity of absorption resonance peak
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图 5. 金纳米旋转椭球吸收共振峰位置和强度随长半轴的变化。(a)吸收共振峰位置;(b)吸收共振峰强度
Fig. 5. Position and intensity of absorption resonance peak of gold nanospheroids varying with major semi-axis. (a) Position of absorption resonance peak; (b) intensity of absorption resonance peak
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图 6. 金纳米旋转椭球体积吸收系数随短半轴和长半轴的变化(入射光波长为800 nm)。(a)尺寸步长为1 nm;(b)尺寸步长为0.1 nm
Fig. 6. Volume absorption coefficient of gold nanospheroides at wavelength of 800 nm varying with minor semi-axis and major semi-axis. (a) Step size of 1 nm; (b) step size of 0.1 nm
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图 7. 金纳米旋转椭球散射共振峰位置和强度随短半轴的变化。(a)散射共振峰位置;(b)散射共振峰强度
Fig. 7. Position and intensity of scattering resonance peak of gold nanospheroids varying with minor semi-axis. (a) Position of scattering resonance peak; (b) intensity of scattering resonance peak
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图 8. 金纳米旋转椭球散射共振峰位置和强度随长半轴的变化。(a)散射共振峰位置;(b)散射共振峰强度
Fig. 8. Position and intensity of scattering resonance peak of gold nanospheroids varying with major semi-axis. (a) Position of scattering resonance peak; (b) intensity of scattering resonance peak
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图 9. 金纳米旋转椭球体积散射系数随短半轴和长半轴的变化(入射光波长为830 nm)。(a)尺寸步长为1 nm;(b)尺寸步长为0.1 nm
Fig. 9. Volume scattering coefficient of gold nanospheroids at wavelength of 830 nm varying with minor semi-axis and major semi-axis. (a) Step size of 1 nm; (b) step size of 0.1 nm
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表 1金纳米旋转椭球的体系吸收系数αabs,max、短半轴aopt以及长半轴copt的优化结果
Table1. Optimization results of volume absorption coefficient αabs,max, minor semi-axis aopt,and major semi-axis copt of gold nanospheroids
| λ / nm | αabs,max / μm-1 | aopt / nm | copt / nm |
|---|
| 800 | 358.45 | 8.4 | 32.1 | | 808 | 362.90 | 8.3 | 32.3 | | 820 | 370.49 | 8.3 | 33.2 | | 1064 | 454.32 | 7.9 | 48.5 |
|
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表 2金纳米旋转椭球与金纳米球壳的吸收特性优化结果
Table2. Optimized results of absorption characteristicsof gold nanospheroids and gold nanoshells
| Object | Parameter | Value |
|---|
| λ=800 nm | λ=808 nm | λ=820 nm | λ=1064 nm |
|---|
| αabs,max/μm-1 | 358.45 | 362.90 | 370.49 | 454.32 | | Gold nanospheroid | aopt/ nm | 8.4 | 8.3 | 8.3 | 7.9 | | copt/nm | 32.1 | 32.3 | 33.2 | 48.5 | | αabs,max /μm-1 | 112.03 | 109.64 | 106.28 | 59.68 | | Gold nanoshell | R1, opt/ nm | 29.2 | 29.3 | 30.5 | 46.0 | | topt /nm | 3.8 | 3.7 | 3.7 | 3.0 |
|
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表 3金纳米旋转椭球的体系散射系数αsca,max、短半轴aopt以及长半轴copt的优化结果
Table3. Optimization results of volume scattering coefficient αsca,max, minor semi-axis aopt, and major semi-axis copt of gold nanospheroids
| λ / nm | αsca,max / μm-1 | aopt / nm | copt / nm |
|---|
| 830 | 147.62 | 19.9 | 67.1 | | 840 | 150.98 | 19.8 | 68.2 | | 900 | 165.92 | 19.3 | 74.9 | | 1310 | 191.59 | 19.6 | 128.4 |
|
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表 4金纳米旋转椭球与金纳米球壳的散射特性优化结果
Table4. Optimized results of scattering characteristics of gold nanospheroids and gold nanoshells
| Object | Parameter | Value |
|---|
| λ=1310 nm | λ=830 nm | λ=840 nm | λ=900 nm |
|---|
| αsca,max /μm-1 | 147.62 | 150.98 | 165.92 | 191.59 | | Gold Nanospheroid | aopt/ nm | 19.9 | 19.8 | 19.3 | 19.6 | | copt/nm | 67.1 | 68.2 | 74.9 | 128.4 | | αsca,max/μm-1 | 59.24 | 58.05 | 51.05 | 23.01 | | Gold nanoshell | R1, opt/ nm | 54.4 | 55.6 | 62.5 | 111.3 | | topt /nm | 10.1 | 10 | 9.4 | 7.8 |
|
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夏伊丁·亚库普, 帕尔哈提江·吐尔孙, 武盼盼. 金纳米旋转椭球的光吸收和散射特性优化[J]. 光学学报, 2020, 40(4): 0429001. Xiayiding Yakupu, Paerhatijiang Tuersun, Panpan Wu. Optimization of Light Absorption and Scattering Properties of Gold Nanospheroids[J]. Acta Optica Sinica, 2020, 40(4): 0429001.
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