Chemical Etching, AFM, Laser Damage Threshold, and Nonlinear Optical Studies of Potential Nonlinear Optical Crystal: Bis (L-Glutamine) Potassium Nitrate

Table 1

Amplitude parameters of BGPN measured by AFM.

S. no	Amplitude parameter	Value
1	Roughness average (𝑆𝑎) (nm)	39
2	Root mean square (𝑆𝑞) (nm)	47
3	Peak-valley height (𝑆𝑦) (𝜇m)	0.38
4	Peak height (𝑆𝑝) (𝜇m)	0.22
5	Valley depth (𝑆𝑣) (𝜇m)	−0.15
6	The mean value (𝑆𝑚) (nm)	0.12