Table 1 Geometry of the metalens.

From: Shaping a Subwavelength Needle with Ultra-long Focal Length by Focusing Azimuthally Polarized Light

n

R n (μm)

n

R n (μm)

n

R n (μm)

n

R n (μm)

1

200

28

273.2

55

347.5

82

421.1

2

202.6

29

276

56

350.4

83

423.9

3

205.4

30

278.7

57

353.1

84

426.5

4

208.1

31

281.5

58

355.8

85

429.1

5

210.6

32

284.1

59

358.6

86

431.7

6

213.3

33

286.7

60

361.4

87

434.4

7

215.9

34

289.5

61

364.1

88

437

8

218.5

35

292.2

62

366.7

89

439.8

9

221.3

36

294.8

63

369.5

90

442.6

10

223.9

37

297.5

64

372.3

91

445.4

11

226.5

38

300.2

65

375.1

92

447.9

12

229.1

39

302.9

66

377.6

93

450.7

13

231.9

40

305.6

67

380.3

94

453.4

14

234.7

41

308.6

68

383.1

95

456.1

15

237.4

42

311.4

69

385.8

96

458.8

16

240.5

43

314.2

70

388.5

97

461.5

17

243.2

44

317

71

391.2

98

464.3

18

245.8

45

319.9

72

394

99

466.9

19

248.5

46

322.6

73

396.6

100

469.5

20

251.7

47

325.4

74

399.3

101

472.3

21

254.4

48

328.1

75

402

102

475.1

22

257.1

49

330.9

76

404.7

103

477.8

23

259.7

50

333.8

77

407.3

104

480.5

24

262.4

51

336.5

78

410.1

105

483.3

25

265

52

339.5

79

412.8

106

485.9

26

267.7

53

342.1

80

415.6

107

488.6

27

270.5

54

344.7

81

418.3