Preparation method of tridimensional controllable defect state photon crystal
A technology of photonic crystals and defect states, applied in optics, nonlinear optics, instruments, etc., can solve the problems of photonic crystal preparation with controllable defects that have not yet been found, and achieve the effect of accurate control of defect states and easy operation
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Embodiment 1
[0027] application figure 1 The optical tweezers system prepares a completely defect-free single-crystal photonic crystal, and its preparation steps are as follows:
[0028] 1) Use a focused particle beam to drill holes with a diameter of 0.8um and a depth of 0.25um on the si plane substrate. The distance between adjacent small holes is 1um. The holes are arranged in a hexagonal pattern with an area of about 343.6um 2 ,Such as figure 2 shown;
[0029] 2) Take a plastic film with a thickness of 30um and a size of 20×20mm, open a hole with a diameter of 5mm in the middle, and stick the plastic film on the si plane substrate with superglue, so that the position of the hole on the si plane substrate is the same as the position of the hole in the plastic film Correspondingly, make a sample pool;
[0030] 3) Preparation of pellet suspension: mix water and solid SiO with a quantitative diameter of 1um 2 The balls are mixed to form a suspension; the volume ratio of the total vo...
Embodiment 2
[0035] Embodiment 2: The preparation method of the photonic crystal with defect state is carried out according to the following steps:
[0036] First prepare the polystyrene bead suspension: the used bead suspension is water and solid polystyrene bead with a quantitative diameter of 1um, and the volume ratio of the bead total volume to the suspension is 2:1000 Then shake the suspension so that the beads form a monodisperse uniform distribution in the suspension; then put hydrochloric acid in the suspension to adjust the pH of the suspension to 4;
[0037] Then proceed as follows:
[0038] Steps 1)~6) are the same as steps 1)~6) in Example 1
[0039] 7) When the fourth layer of crystals is arranged, drop the prepared polystyrene pellet suspension;
[0040]8) Use optical tweezers to place three polystyrene pellets in the middle of the sample cell to introduce defects.
[0041] 9) Arrange defect-free SiO at other positions in the fourth layer 2 small ball.
[0042] 10) Repea...
Embodiment 3
[0045] The steps are similar to Example 2, the difference is that the defect in this example is not the introduction of another kind of pellets, and the prepared pellet suspension is: water and solid SiO with a quantitative diameter of 1um 2 The balls are mixed according to the volume ratio of the total volume of the balls to the suspension at 1:100 to form a suspension; and during the preparation process, a small ball is removed to leave a vacancy to cause defects, and the electron microscope scanning of its photonic crystal Figure such as Figure 4 shown.
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