Fitting Drude-Lindhard parameters for Cu
i ai ωpi γi

1

-3.2600E-03

1.492

0.527

2

-6.1150E-02

1.893

2.717

3

-1.4910E-02

1.971

0.573

4

2.8710E-05

2.200

0.009

5

4.3200E-03

2.265

0.321

6

-2.9743E-04

3.204

0.084

7

6.0101E-04

3.445

0.090

8

1.7590E-05

3.600

0.013

9

1.0010E-02

4.093

1.076

10

-9.4510E-05

4.848

0.235

11

1.7573E-04

5.449

0.207

12

-3.5310E-02

5.528

2.028

13

-3.8612E-04

6.149

0.324

14

1.8680E-02

7.319

1.901

15

7.2240E-02

9.919

4.749

16

-8.4568E-04

13.913

1.252

17

1.2210E-02

17.006

3.504

18

1.2872E-01

19.741

7.409

19

-1.5370E-02

24.412

4.353

20

9.6420E-02

28.210

7.290

21

8.9700E-03

37.384

8.791

22

4.2300E-03

48.937

10.701

23

7.5069E-01

53.275

166.280

24

-3.2439E-04

57.397

4.090

25

7.3893E-04

62.275

4.888

26

-2.4400E-03

73.129

8.930

27

-4.4729E-04

83.616

5.477

28

1.0050E-02

83.752

16.703

29

1.5280E-02

121.360

52.598

30

1.0400E-03

174.499

35.309

31

1.2300E-03

241.621

68.826

32

-4.2826E-04

710.928

776.304

33

-5.0860E-05

893.710

110.963

34

1.4885E-04

1007.673

138.661

35

2.0830E-05

1081.688

82.378

36

8.2620E-05

1136.469

166.088

37

1.8361E-04

1288.311

370.044

38

1.8380E-05

1709.853

365.072

39

1.7995E-04

2123.531

1249.763

40

3.2980E-05

2847.736

948.765



References of fitted experimental data for Cu

Incident photon
energy range (eV)

Fitted optical
constants

Source of data

0.1-1

n, k

B. Dold and R. Mecke, Optik 22, 435 (1965)

1-9000

n, k

H. Hagemann et al., J. Opt. Soc. Am. 65, 742 (1975)