Preparation method of lens for color center single photon collection
A single-photon, color-centered technology, applied in the process of producing decorative surface effects, manufacturing micro-structure devices, decorative arts, etc., can solve the problem of limited precision of focused ion beams, great differences in theoretical values, and diamond hemispherical lenses. To solve the problems of low photon collection and utilization efficiency, achieve the effects of improving single photon collection and utilization efficiency, smooth shape, and simple manufacturing process
Active Publication Date: 2016-09-28
INST OF PHYSICS - CHINESE ACAD OF SCI
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However, the precision of direct etching with focused ion beams is limited, and the single-photon collection and utilization efficiency of diamond hemispherical lenses prepared by this scheme is still not high, which is far from the theoretical value.
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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0029] According to one embodiment of the present invention, a method for preparing a diamond hemispherical lens for a single photon source is provided, comprising the following steps ( Figure 1a ˜f shows schematic diagrams of different stages of processing diamond hemispherical lenses in the preparation method of diamond hemispherical lenses for single photon sources, and the following step S1 corresponds to Figure 1a , step S2 corresponds to Figure 1b , step S3 corresponds to Figure 1c , steps S4 to S6 correspond to Figure 1d , step S7 corresponds to Figure 1e , step S8 corresponds to Figure 1f ):
[0030] Step S1: Reference Figure 1a , take a diamond block 1 having at least one polished surface, and make an alignment mark 2 on the polished surface of the diamond block (hereinafter simply referred to as the surface). Alignment mark 2 type ...
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Abstract
The invention provides a manufacturing method of a lens for collecting color center single photons. The manufacturing method comprises the following steps: (1) finding the position of a color center in a diamond block; and (2) etching a fan-shaped spherical surface taking the color center as a sphere center into the surface of the diamond block by using a plurality of annular particle beam pattern groups. In each annular particle beam pattern group, the circle centers of annular particle beam patterns are staggered, the radiuses of the inner circles of the annular particle beam patterns are equal, and the circle centers of the annular particle beam patterns are uniformly distributed on a same circumference. The inner diameters of the annular particle beam patterns in the annular particle beam pattern groups gradually decrease to be approximate to 0. Through adoption of the manufacturing method, the collection and utilization efficiencies of the single photons of a diamond single-photon source can be increased remarkably. The manufacturing process of the method is simple. The appearance of a diamond hemispherical lens is smoother under the condition that focused ion beam machining equipment with limited accuracy is used, and the collection and utilization efficiencies of the single photons are closer to theoretical values.
Description
technical field [0001] The invention relates to the field of micro-nano device processing technology and the field of quantum information technology, in particular, the invention relates to a preparation method of a lens used for color center single photon collection. Background technique [0002] The photon as a quantum entity has played an important role in opening understanding of the quantum world. Among them, a single-photon source capable of emitting a single photon is a major quantum platform. [0003] At present, most of the systems that can controllably emit single photons are single-emitter quantum systems, which include: semiconductor quantum dots, mesoscopic quantum wells, single molecules, single atoms and single ions, and NV color centers (nitrogen substitution in diamond color centers combined with adjacent vacancy defects, hereinafter referred to as color centers), etc. Its operating principle is: when a single photon needs to be emitted, the system enters ...
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IPC IPC(8): B81C1/00
Inventor 顾长志姜倩晴李无瑕潘新宇刘东奇刘刚钦常彦春
Owner INST OF PHYSICS - CHINESE ACAD OF SCI