Figure 6

Visualization of the first three bands of hemispherical harmonics. (a)$H_0^0$. (b)$H_1^{-1}$. (c)$H_1^0$. (d)$H_1^1$. (e)$H_2^{-2}$. (f)$H_2^{-1}$. (g)$H_2^0$. (h)$H_2^1$. (i)$H_2^2$. The distance r from the origin to any point (θ,ϕ,r) on the plot surface is proportional to the value of $H_l^m$ at direction (θ,ϕ), with cyan indicating positive values and purple negative. Red, green and blue indicate x, y and z axes, respectively.