Table 1. Layer model and fitting parameters for the Au film containing a monolayer of R6G molecules.

layer	Au film				R6G/Au film				△
		d	ε′	ε″		d	ε′	ε″	∆ d	∆ ε′	∆ε″
1	Prism	∞	3.4	0	Prism	∞	3.4	0	0	0	0
2	Cr	2.1	−4.4	18.1	Cr	2.1	− 4.4	18.1	0	0	0
3	Gold	50.0	−11.5	1.4	Gold	50.0	−11.5	1.4	0	0	0
4	Air	∞	1	0	R6G	0.6	4.4	5.9	–	–	–
5					Air	∞	1	0	–	–	–

Comparison of the changes in the dielectric constant as a function of the monolayer of R6G molecules on Au.