Graphene-based waveguide integrated multimode electro-optic modulator and manufacturing method thereof
An electro-optical modulator and waveguide integration technology, applied in the field of integrated optics, can solve the problems of increasing equipment cost and volume, affecting the application of mode division multiplexing technology, and being unfavorable for high integration and temperature control of on-chip devices, so as to facilitate high-density integration. , the effect of large carrier mobility, low energy consumption and heat
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Embodiment 1
[0030] Such as figure 2 The shown graphene-based waveguide integrated multimode electro-optical modulator: the graphene width of the first graphene nanoribbon layer 1 is 300nm, the graphene width of the second graphene nanoribbon layer 2 is 350nm, and the waveguide width is 1μm , The height of the multimode ridge waveguide 4 is 250nm, and the multimode electro-optic modulator integrated with the graphene-based waveguide is designed as a Mach-Zehnder modulator with two arms length of 350nm. In the initial state, the Fermi levels of the first graphene nanoribbon layer and the second graphene nanoribbon layer of both arms are adjusted to 0.4 eV. Such as Figure 3-1 with Figure 3-2 As shown, the graphene and TE are changed by changing the Fermi level of the first graphene nanoribbon layer to 0.8eV 0 With TE 1 Mode interaction, due to the first graphene nanoribbon layer and TE 1 Strong mode effect, TE 0 Mode effect is weak, TE 1 The optical phase shift of the mode is large, TE 0 Th...
Embodiment 2
[0033] Such as Figure 4 The shown graphene-based waveguide integrated multimode electro-optical modulator: the graphene width of the first graphene nanoribbon layer 1 is 300nm, the graphene width of the second graphene nanoribbon layer 2 is 350nm, and the waveguide width is 1μm , The height of the multimode ridge waveguide 4 is 250nm, and the multimode modulator integrated with the graphene-based waveguide is designed as a micro-race resonant cavity modulator, which is a kind of micro-ring resonator. The length of the straight waveguide in the channel resonator is 228.5 μm, the radius of the semicircle in the micro-race cavity is 30 μm, and the distance between the straight waveguide of the micro-race cavity and the coupled straight waveguide 10 is 344 nm. Choose 1.55237μm as the detection wavelength. Such as Figure 5-1 to Figure 5-4 As shown, in the initial state, the Fermi level of the first graphene nanoribbon layer is adjusted to 0.45 eV, and the Fermi level of the secon...
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