**8. The proposed tumor tissue model**

The proposed tumor represents cancer cells in the skin tissue located in the center of the skin structure as shown in **Figure 2**.

The thermal properties of the tissue are listed in **Table 1**. In addition, the dielectric properties of the tissue play an important role in the investigation of the *Plasmonic Optical Nano-Antenna for Biomedical Applications DOI: http://dx.doi.org/10.5772/intechopen.105458*

#### **Figure 1.**

*(a) Schematic diagram of single 3D plasmonic nano-antenna with dimensions of the length of nano-antenna is (L), the width is (W), the thickness is (T), the apex width is (A), the gap width is (G) for the gold and the length (l), width (w), thickness (t) for the SiO2, and (b) the direction of excitation.*

propagation characteristic of the plasmonic optical nano-antenna. These properties are mainly depending on tissue type and the wavelength of interest.

### **8.1 Exposing the tumor to the designed nano-antenna**

The designed tissue is subjected to the plasmonic nano-antenna (single and an array) radiation at different distances, the resulted pattern is shown in **Figure 3**.

The designed structure was illuminated normally by a waveguide source linearly polarized along the x-axis as shown in **Figure 3**. The proposed tissue is located in the upper edge of the antenna and centered in front of the gap of the nano-antenna. The structure is surrounded by the air.

#### **Figure 2.**

*3D schematic view of the tumor embedded in the skin tissue. The dimensions are (L = W = 600 nm and T = 300 nm).*


**Table 1.**

*The properties of the tissues.*
