Table 2 Comparison of optical bistability reported in literature.

From: Enhanced optical bistability in slotted photonic crystal structure for microwave frequency generation

References

Platform

Threshold power

Q factor

Mechanism

Validation method

40

2D Photonic crystal (Rods in air)

Few mW

557

Kerr nonlinearity

Simulation

14

2D Photonic crystal (Holes in slab)

0.4 mW

7640

Kerr nonlinearity

Experimental

41

2D Photonic crystal (InGaAs)

37 \(\upmu\)W

2700

Kerr nonlinearity

Experimental

42

2D Photonic crystal (InGaAs)

4.2 mW

\(1.8\times 10^5\)

Kerr nonlinearity

Experimental

17

2D Photonic crystal (Holes in slab)

25 \(\upmu\)W

33400

Kerr + Thermo-optic

Experimental

43

1D Photonic crystal (Holes in slab)

1.6 \(\upmu\)W

\(1\times 10^5\)

Kerr + Thermo-optic

Experimental

15

Gourd shaped Silicon ring

3 mW

\(2.2\times 10^5\)

Kerr nonlinearity

Experimental

16

Highly doped silica ring

4–6 mW

NA

Thermo-optic

Experimental

22

Plasmonic racetrack resonator

2.2 mW/cm

NA

Kerr nonlinearity

Simulation

24

Photonic crystal dimer array

10 mW/m

NA

Topological feature

Simulation

This work

Slotted photonic crystal

2 \(\upmu\)W

\(2.1\times 10^6\)

Kerr nonlinearity

Simulation