An exciton polariton laser based on an open microcavity

Abstract

The utility model discloses an exciton polaron laser based on open microcavity, including casing, piezoelectric displacement platform, upper DBR mirror and lower DBR mirror, the cavity with one -way opening has in casing, upper DBR mirror is assembled in the cavity, and is close to the opening, lower DBR mirror is provided with exciton gain dielectric layer, piezoelectric displacement platform can lift and lower the assembly in the cavity far from the opening one side, lower DBR mirror is fixed in piezoelectric displacement platform, to make lower DBR mirror close or far from upper DBR mirror, and piezoelectric displacement platform is used for fine adjustment lower DBR mirror's displacement distance, such can respectively coarse adjustment and fine adjustment to the microcavity cavity length between upper DBR mirror and lower DBR mirror, and then guarantee the strong coupling state between exciton and cavity photon, after continuing to increase the light power, can form polarized plasmon condensation, also can conveniently regulate and control the energy difference between cavity photon and exciton.

Claims

1. An exciton polariton laser based on an open microcavity, characterized in that: Includes a housing, a piezoelectric displacement stage, and an upper DBR reflector and a lower DBR reflector arranged vertically. The housing has a cavity with a one-way opening, and the upper DBR reflector is assembled in the cavity and close to the opening; the side of the lower DBR reflector facing the upper DBR reflector is provided with an exciton gain dielectric layer. The piezoelectric displacement stage is vertically mounted on the side of the cavity away from the opening, and the lower DBR reflector is fixedly mounted on the end of the piezoelectric displacement stage facing the upper DBR reflector, so that the lower DBR reflector moves closer to or further away from the upper DBR reflector along the axial direction of the cavity, and the piezoelectric displacement stage is used to finely adjust the displacement distance of the lower DBR reflector in the axial direction of the cavity.

2. The open microcavity based exciton polariton laser of claim 1, wherein: The axial displacement resolution of the piezoelectric displacement stage is ≤50nm.

3. The exciton polariton laser based on an open microcavity according to claim 2, characterized in that: The piezoelectric displacement stage is an alumina ceramic piezoelectric displacement stage.

4. The exciton polariton laser based on an open microcavity according to any one of claims 1-3, characterized in that: The housing includes a metal grid and a metal base connected together. The metal grid has a recessed first groove on the side facing the metal base and a light-transmitting hole communicating with the first groove. The upper DBR reflector is assembled in the first groove. The metal base has a recessed second groove on the side facing the metal grid. A liftable metal column is provided in the bottom wall of the second groove. The end of the piezoelectric displacement stage away from the lower DBR reflector is fixed to the metal column. The movement trajectory of the metal column is parallel to the axial direction of the cavity.

5. The open microcavity based exciton polariton laser of claim 4, wherein: The bottom wall of the second tank is provided with a receiving groove for accommodating the metal column. The metal column is slidably assembled in the receiving groove. An adjusting screw is inserted into the groove wall. One end of the adjusting screw extends into the receiving groove and abuts against the end of the metal column away from the piezoelectric displacement stage.

6. The open microcavity based exciton polariton laser of claim 4, wherein: The light-transmitting aperture is rectangular.

7. The open microcavity based exciton polariton laser according to any of claims 1 to 3, characterized in that: The exciton gain dielectric layer is a perovskite dielectric layer, and the area of ​​the exciton gain dielectric layer is smaller than the minimum DBR area of ​​the upper and lower DBR mirrors.

8. The open microcavity based exciton polariton laser according to any of claims 1-3, characterized in that: The upper DBR mirror has a first substrate and a first high reflectivity dielectric layer disposed on the first substrate; the lower DBR mirror has a second substrate and a second high reflectivity dielectric layer disposed on the second substrate, and the exciton gain dielectric layer is located on the outer surface of the second high reflectivity dielectric layer away from the second substrate. The first high reflectivity dielectric layer and the second high reflectivity dielectric layer each include a silicon dioxide layer and a titanium dioxide layer stacked together.

9. The open microcavity based exciton polariton laser of claim 8, wherein: The first substrate is a quartz substrate; the second substrate is a quartz substrate or a silicon substrate.

Images