One-way emergent defect oval microcavity and laser

A micro-cavity and oval-shaped technology, applied in the field of micro-cavity lasers, can solve problems such as inability to adapt to applications, and achieve the effects of saving space, easy arraying, and small device volume

Active Publication Date: 2021-11-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of this microdisk reaches 160 μm, which cannot adapt to the application of smaller scale or even nanometer scale.

Method used

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  • One-way emergent defect oval microcavity and laser
  • One-way emergent defect oval microcavity and laser
  • One-way emergent defect oval microcavity and laser

Examples

Experimental program
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Embodiment 1

[0030] Embodiment 1 The defect oval microcavity laser and defect oval microcavity provided by this embodiment, such as figure 1 As shown, it includes a pump light source 1, a substrate 2, an oval microcavity 3 and a spectrometer 4. The pumping light source 1 is a pulse frequency doubled laser as the pumping incident light source. The oval microcavity 3 is a whispering gallery mode optical microcavity, which is set on the substrate 2 . The spectrometer 4 is a visible spectrometer.

[0031] The function of the pumping light source 1 is to incident the pumping light on the side of the notch of the oval microcavity 3 , and the irradiation center is at the center of the notch 5 . The function of the oval microcavity 3 is to form a whispering gallery optical microcavity, and under the irradiation of the pump light source, the laser satisfying the resonance condition can oscillate multiple times in the microcavity. The function of the spectrometer 4 is to collect and analyze the o...

Embodiment 2

[0038] Example 2 The defective ovoid microcavity provided in this example is an ovoid-shaped microsphere with a half ellipsoid gap, and its shape is similar to that of an egg placed horizontally, such as Figure 8 As shown in (a), the notch is located at the larger end.

[0039] Figure 7 It is a diagram of the variation of the output efficiency with the resonance wavelength when the oval microcavity 3 provided in this embodiment is an oval microdisk and an oval microsphere respectively. It can be seen from the figure that the emission efficiency of the oval microsphere is higher than that of the oval microdisk, and the highest emission efficiency reaches 93%.

[0040] Such as Figure 8 As shown, the oval-shaped microcavity of the present embodiment has the highest resonance peak at 536nm, such as Figure 8 Shown in (d). The far-field divergence angle of the egg-shaped microsphere of the present embodiment is only 2.5° under this resonance wavelength, as Figure 8 In (b),...

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Abstract

The invention belongs to the technical field of microcavity lasers, and relates to a one-way emergent defect oval microcavity and a laser. The one-way emergent defect oval micro-cavity is composed of a left semi-oval micro-cavity and a right semi-oval micro-cavity with unequal major semi-axes and equal minor semi-axes, and the edge of the oval micro-cavity is provided with a notch. The invention further provides a laser comprising the defect oval microcavity, one-way emission can be achieved in the visible light wave band, the far-field divergence angle is not larger than 3 degrees, and the highest emission efficiency reaches 93%. The invention has the advantages of simple and compact structure, easiness in preparation, smaller device volume, space saving, easiness in arraying and the like, and can be widely applied to the fields of biomedicine, environment detection and the like.

Description

technical field [0001] The invention belongs to the technical field of microcavity lasers, and relates to a defect oval microcavity and a laser with one-way emission. Background technique [0002] Whispering gallery mode microcavity lasers have the advantages of small size, low threshold, and low power consumption, and are quite advantageous in applications such as photonic integrated circuits and on-chip optical interconnection light sources. In the past two decades, the unidirectional output characteristics of microcavity lasers have attracted extensive attention from researchers, but limited by their circular rotationally symmetric structures, the unidirectional output characteristics of whispering gallery mode microcavity lasers have severely limited it. large-scale integration and application. [0003] One solution is to use devices such as prisms, planar waveguides, or wedge-shaped fibers to couple evanescent waves out. However, this method requires precise calibrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/06H01S3/16
CPCH01S3/08H01S3/06H01S3/16
Inventor 马晓明范书振李永富刘兆军赵显方家熊
Owner SHANDONG UNIV
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