Fig. 1. Stereograms of metal nanocomposite structures. (a) Cube; (b) cylinder; (c) cone

Fig. 2. Schematics of plasma resonance. (a) Longitudinal mode (LM); (b) transverse mode (TM)

Fig. 3. Absorption spectra of three composite structures

Fig. 4. Electric field distributions in x-z planes of three composite structures under two resonance modes. (a)(d) Gold nanocuboid composite structure; (b)(e) gold nanocylinder composite structure; (c)(f) gold nanocone composite structure

Fig. 5. Electric field distributions in x-y planes of three composite structures under two resonance modes. (a)(d) Gold nanocuboid composite structure; (b)(e) gold nanocylinder composite structure; (c)(f) gold nanocone composite structure

Fig. 6. Absorption spectra and two-dimensional cloud maps of absorption properties of three composite structures under different transverse axis lengths. (a) Absorption spectra of gold nanocuboid composite structure; (b) two-dimensional cloud map of absorption property of gold nanocuboid composite structure; (c) absorption spectra of gold nanocylinder composite structure; (d) two-dimensional cloud map of absorption property of gold nanocylinder composite structure; (e) absorption spectra of gold nanocone composite structure; (f) two-dimensional cloud map of absorption property of gold nanocone composite structure

Fig. 7. Absorption spectra and two-dimensional cloud maps of absorption properties of three composite structures under different heights. (a) Absorption spectra of gold nanocuboid composite structure; (b) two-dimensional cloud map of absorption property of gold nanocuboid composite structure; (c) absorption spectra of gold nanocylinder composite structure; (d) two-dimensional cloud map of absorption property of gold nanocylinder composite structure; (e) absorption spectra of gold nanocone composite structure; (f) two-dimensional cloud map of absorption property of gold nanocone composite structure

Fig. 8. Absorption spectra of three composite structures under different aspect ratios. (a) Absorption spectra of gold nanocuboid composite structure; (b) absorption spectra of gold nanocylinder composite structure; (c) absorption spectra of gold nanocone composite structure

Fig. 9. Absorption spectra and two-dimensional cloud maps of absorption properties of three composite structures under different spacings. (a) Absorption spectra of gold nanocuboid composite structure; (b) two-dimensional cloud map of absorption property of gold nanocuboid composite structure; (c) absorption spectra of gold nanocylinder composite structure; (d) two-dimensional cloud map of absorption property of gold nanocylinder composite structure; (e) absorption spectra of gold nanocone composite structure; (f) two-dimensional cloud map of absorption property of gold nanocone composite structure