Table 1 Summary of experimentally obtained Q-factors in metasurfaces.

From: Ultra-high-Q resonances in plasmonic metasurfaces

Mechanism

Q

λ (nm)

Material

Light source

Array size (μm2)

Reference

SLR

2340

1550

Au NPs

Supercontinuum

600×600

This work

LSPR

<10

700

Au NPs

Tungs.-halogen lamp

3000 × 3000

61

SLR

25

930

Au NPs

Collimated source

135 × 135

27

SLR

30

850

Au NPs

Tungs.-halogen lamp

3000 × 3000

61

SLR

40–60

600

Au NPs

Ellipsometer

200 × 200

28

SLR

60

800

Au NPs

Tungs.-halogen lamp

35 × 35

26

SLR

150

764

Au NPs

Tungs.-halogen lamp

N/A

62

SLR

230

900

Au NPs

Tungs.-halogen lamp

~10,000 × 10,000

63

SLR

300

1500

Au nanostripes

Tungs.-halogen lamp

300 × 100

40

SLR

330

648

Ag NPs

Tungs.-halogen lamp

2500 × 2500

37

SLR

430

860

Au NPs

Tungs.-halogen lamp

1000 × 1000

34

Mirror image

200

5000

ITO nanorods

Collimated source

N/A

35

EIT

483

1380

Si

Tungs.-halogen lamp

225 × 240

64

Fano resonance

65

THz

Al particles

THz laser

10,000 × 10,000

65

Fano resonance

100

THz

Au Assym. NPs

FTIR

150 × 150

66

Fano resonance

350

1000

Si

N/A

N/A

67

Fano resonance

600

1000

GaAs

N/A

N/A

67

BIC

2750

825

GaAs

Laser

60 × 108

68

Quasi-BIC

18,511

1588.4

Si

Laser

15 × 15

69

  1. The results presented in this work are in bold.
  2. Q quality factor, λ resonance wavelength, NP nanoparticle, SLR surface lattice resonance, LSPR localized surface plasmon resonance, EIT electromagnetically induced transparency, BIC bound state in the continuum.