Chapter 107 Micro-nano structural materials

Everyone is undoubtedly very disappointed with this result.

Although initially everyone was not too disappointed with this new plan.

But even if the collection efficiency can be slightly improved, it can still give them some incentives.

However, the collection efficiency was decreasing instead of increasing, which really made them feel very frustrated.

Among the experimental group, the most disappointed person was undoubtedly Wang Xiangwu.

As the proposer of this plan, Wang Xiangwu knew that he must bear the main responsibility.

These days, Wang Xiangwu has been worried about the failure of the experiment.

You may even suffer from insomnia at night, tossing and turning in bed.

But Wang Xiangwu also knows that at this time, he must not blame himself excessively.

Scientific research is not always smooth sailing, and it is normal to not achieve ideal results.

In the laboratory, Wang Xiangwu did not show too much disappointment, but encouraged everyone so that everyone could regain their confidence.

For this reason, Wang Xiangwu also specially gave everyone a day of rest.

After everyone recovered physically and mentally, Wang Xiangwu once again organized a summary meeting on this new topic.

"Unfortunately, the experimental results proved that this plan failed. But it is also very normal. This is a completely unprecedented direction. We don't have much to learn from, and we can only continue to explore forward."

"Although the experiment failed, it was not completely fruitless. We must summarize the reasons for the failure and see if we can improve the plan or seek new solutions in the future."

After a day's rest, everyone's mental state has improved a lot, and they are not as depressed as before.

"We have also summarized it these days. The main reason is that quantum dots have a dipole-like radiation pattern and the radiation directionality is very poor. At the same time, quantum dots are still in semiconductor materials with high refractive index. Therefore, radiation and collection To the objective, the entangled photon pairs in the fiber are very inefficient."

Experimental data show that at this stage of the experiment, the average collection efficiency of entangled photon pairs is even less than 1%.

Such low efficiency is far from the goal of high efficiency among the "three highs" set by Wang Xiangwu.

Xu You also understood the main problems in this plan through daily observations in the laboratory and analysis of experimental data.

Unfortunately, even if you know the problem, it is far more difficult to improve the solution or come up with a new solution than you think.

In it, there is not only a lot of knowledge about quantum physics and optics, but also some knowledge about materials and device structures.

After all, Xu You was just a freshman in college, and he only had a little dabbling in a lot of knowledge, far from being very professional.

At this time, another professor in the laboratory proposed a new point of view.

"I think we can consider using micro-nano structure materials to extract photons radiated from quantum dots. For example, micro-pillar pairs, if there are suitable materials and the ideal structure can be designed, it is totally promising. It will improve the collection efficiency to a new level.”

The professor's name is Wu Hong, and he is the professor with the highest rank and seniority in the experimental group besides Wang Xiangwu.

Wang Xiangwu also fell into deep thought after listening to Wu Hong's suggestion.

The so-called micro-nano structure materials refer to materials with fine structures on the order of microns and nano-microns.

This structure is very precise, with dimensions often ranging from tens to hundreds of nanometers.

Materials with such precise structures often contain many new optical properties.

These new optical laws cannot be reflected on a macroscopic scale.

But it is suitable for nanoscale directions such as quantum optics.

Xu You also learned about this micro-nano structure material from some information, but it can only be said to be a preliminary understanding.

It is not yet possible to apply it in experiments.

"The micro-nano structure solution is indeed feasible, but the problem is that we are not engaged in micro-nano materials, and even our School of Materials Science and Engineering at Jilin University may not be able to meet our ideal requirements."

"I know some elite material experts in this area. I will consult later to see if there are suitable materials." Wu Hong said.

"Well, that's fine. Let's tentatively explore this direction first. If you have any other plans, please feel free to contact me at any time."

In fact, after hearing the "material", Xu You also thought of his father Xu Zhou.

Xu You was just thinking about whether to talk about this matter at the meeting.

But after thinking about it, I decided to ask Xu Zhou first if he had done any research in this area, and if possible, then talk to Wang Xiangwu about this matter.

At this time, Xu You also somewhat understood what Luo Wenkun said before, that scientific research is also about the wisdom of the world.

Just like Wu Hong knows Jinghua's material experts, this can be said to be a kind of human network resource.

After all, when a scientific research project is large enough and involves many things.

It is difficult for a laboratory to handle everything.

In this case, more experts from other industries will be needed to cooperate.

Even the fact that Xu You obtained some metal cluster materials through Xuzhou can be said to be a kind of human connection.

After this meeting, everyone was in a better state than before.

Although I don’t know how feasible it is, the subject finally has new hope.

After coming out of the laboratory, Xu You took out his mobile phone and sent a message to Xu Zhou.

"Professor Xu, have you ever made micro-nano structural materials?"

After a while, Xu Zhou replied to Xu You.

"Son, although your father and I are masters of materials science in China, there are many types of materials. I mainly study metal materials. I have never made such micro-nano structural materials, and I don't know much about them.

."

Xu You was also mentally prepared for this result.

Xu You also knows that when scientific research goes higher, the direction of research often becomes more detailed.

For example, a student who majored in physics as an undergraduate majored in condensed matter physics at the master's level.

After receiving his Ph.D., he mainly studied the topic of superconductivity in condensed matter physics.

As long as we can take this small direction and make some breakthrough research results.

You can complete your PhD degree.

"Okay, I understand. I'll contact you if I have any questions."

Fortunately, Xu You didn't tell Wang Xiangwu before that his father was dealing with materials.

In this case, Xu You felt that it would be better to wait for the news from Professor Wu Hong first.

Wu Hong also got some good news after contacting Jinghua's material experts.

Jinghua’s materials experts have indeed done a lot of research related to micro-nano materials.
Chapter completed!