Table A2.

The measured real ε′ and imaginary ε″ parts of thin copper films on graphene as well as their refractive indices n and extinction coefficients k (at room temperature). The data at the most widely used laser wavelengths are in bold.

		t = 25 nm (rate = 15 A/s)				t = 50 nm (rate = 15 A/s)
E (eV)	λ (nm)	ε′	ε″	n	k	ε′	ε″	n	k
0.38	3298	−456	99.5	2.32	21.5	−502	97.3	2.16	22.5
0.45	2739	−318	58.4	1.63	17.9	−349	56.9	1.52	18.7
0.53	2343	−233	37.1	1.21	15.3	−255	36.0	1.12	16.0
0.61	2046	−177	25.1	0.94	13.4	−194	24.3	0.87	14.0
0.68	1816	−139	17.7	0.75	11.8	−152	17.2	0.70	12.3
0.76	1633	−111	13.1	0.62	10.6	−122	12.7	0.57	11.0
0.80	1550	−99.7	11.3	0.57	10.0	−109	10.9	0.52	10.5
0.84	1483	−90.8	10.0	0.52	9.54	−99.3	9.66	0.48	9.98
0.91	1359	−75.2	7.87	0.45	8.68	−82.3	7.60	0.42	9.08
0.95	1310	−69.4	7.14	0.43	8.34	−76.0	6.89	0.39	8.73
0.99	1253	−63.0	6.35	0.40	7.94	−69.0	6.13	0.37	8.31
1.07	1163	−53.3	5.26	0.36	7.31	−58.4	5.08	0.33	7.65
1.14	1085	−45.5	4.46	0.33	6.75	−49.9	4.30	0.30	7.07
1.16	1064	−43.0	4.23	0.32	6.57	−47.3	4.08	0.30	6.88
1.22	1017	−39.0	3.87	0.31	6.26	−42.9	3.73	0.28	6.56
1.30	957	−33.7	3.43	0.29	5.81	−37.1	3.31	0.27	6.10
1.37	903	−29.2	3.10	0.29	5.41	−32.2	3.00	0.26	5.68
1.45	856	−25.4	2.87	0.28	5.04	−28.1	2.77	0.26	5.31
1.53	813	−22.1	2.71	0.29	4.71	−24.5	2.61	0.26	4.96
1.59	780	−19.7	2.62	0.29	4.45	−21.9	2.53	0.27	4.69
1.60	774	−19.2	2.61	0.30	4.39	−21.4	2.52	0.27	4.64
1.68	738	−16.8	2.56	0.31	4.11	−18.8	2.47	0.28	4.34
1.76	706	−14.6	2.56	0.33	3.83	−16.4	2.48	0.31	4.06
1.83	677	−12.6	2.62	0.37	3.58	−14.3	2.52	0.33	3.80
1.91	649	−10.9	2.72	0.41	3.33	−12.4	2.62	0.37	3.55
1.96	633	−9.71	2.84	0.45	3.15	−11.1	2.74	0.41	3.36
1.99	624	−9.37	2.89	0.47	3.10	−10.8	2.78	0.42	3.31
2.06	601	−8.00	3.13	0.54	2.88	−9.26	3.00	0.49	3.08
2.14	580	−6.78	3.45	0.64	2.68	−7.92	3.31	0.58	2.87
2.22	560	−5.74	3.88	0.77	2.52	−6.76	3.71	0.69	2.69
2.29	541	−4.95	4.39	0.91	2.40	−5.81	4.21	0.83	2.55
2.33	532	−4.60	4.71	1.00	2.36	−5.35	4.56	0.92	2.49
2.37	523	−4.46	4.91	1.04	2.35	−5.14	4.79	0.97	2.47
2.45	507	−4.25	5.31	1.13	2.35	−4.80	5.33	1.09	2.45
2.52	492	−4.23	5.45	1.16	2.36	−4.74	5.66	1.15	2.46
2.60	477	−4.17	5.32	1.14	2.34	−4.79	5.67	1.15	2.47
2.68	463	−3.96	5.08	1.11	2.28	−4.73	5.44	1.11	2.44
2.75	450	−3.63	4.84	1.10	2.20	−4.50	5.13	1.08	2.38
2.83	438	−3.22	4.70	1.11	2.11	−4.14	4.87	1.06	2.29
2.91	427	−2.82	4.64	1.14	2.03	−3.73	4.70	1.07	2.21
2.98	416	−2.45	4.65	1.19	1.96	−3.32	4.62	1.09	2.12
3.06	405	−2.14	4.72	1.23	1.91	−2.96	4.61	1.12	2.05
3.14	395	−1.89	4.82	1.28	1.88	−2.65	4.65	1.16	2.00
3.21	386	−1.70	4.94	1.33	1.86	−2.40	4.71	1.20	1.96
3.29	377	−1.58	5.06	1.36	1.85	−2.22	4.79	1.24	1.94
3.37	368	−1.52	5.17	1.39	1.86	−2.09	4.87	1.27	1.92
3.44	360	−1.52	5.26	1.41	1.87	−2.02	4.93	1.29	1.92
3.52	352	−1.57	5.31	1.41	1.88	−2.00	4.96	1.29	1.92
3.60	345	−1.65	5.32	1.40	1.90	−2.02	4.97	1.29	1.92
3.67	338	−1.75	5.30	1.38	1.92	−2.06	4.94	1.28	1.93
3.75	331	−1.87	5.23	1.36	1.93	−2.12	4.88	1.26	1.93
3.83	324	−1.99	5.11	1.32	1.93	−2.18	4.76	1.24	1.93
3.90	318	−2.10	4.95	1.28	1.93	−2.24	4.63	1.20	1.92
3.98	312	−2.20	4.77	1.24	1.93	−2.29	4.46	1.17	1.91
4.06	306	−2.26	4.55	1.19	1.92	−2.32	4.27	1.13	1.90
4.13	300	−2.32	4.33	1.14	1.90	−2.34	4.07	1.08	1.88