Chapter 105 Micro-Nano Structure Materials
Everyone is undoubtedly very disappointed with this result.
Although everyone was not too disappointed with this new plan at first.
But even if the collection efficiency can be slightly improved, it can give them some incentives.
However, the collection efficiency, which decreased instead of increased, really made them feel very frustrated.
In 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.
I may even suffer from insomnia at night and toss and turn in bed.
But Wang Xiangwu also knew that at this time, he must not blame himself too much.
Scientific research is never smooth sailing, and it is very normal not to produce ideal results.
In the laboratory , Wang Xiangwu did not show too much disappointment, but encouraged everyone so that they could regain their confidence.
For this reason, Wang Xiangwu also let everyone rest for a day.
After everyone had recovered physically and mentally, Wang Xiangwu once again organized a summary meeting on this new topic.
"Unfortunately, the experimental results show that this plan has failed. But this is also very normal. This is a completely unprecedented direction. We don't have much to learn from, and we can only keep exploring."
"Although the experiment failed, it is not completely without results. We must summarize the reasons for the failure and see whether we should improve the plan or look for a new one."
After a day's rest, everyone's mental state has improved a lot and they are no longer as depressed as before.
"We have summarized it these days. The main reason is that quantum dots have a dipole-like radiation pattern and very poor radiation directionality. At the same time, quantum dots are in semiconductor materials . Therefore, the efficiency of entangled photon pairs radiated and collected in the objective lens and optical fiber is very low."
Experimental data show that in this phase of the experiment, the average collection efficiency of entangled photon pairs is less than 1%.
Such low efficiency is far from achieving the high efficiency goal of the “three highs” set by Wang Xiangwu.
Xu You also understood the main problems of this plan through his daily observations in the laboratory and analysis of experimental data.
Unfortunately, even if we know where the problem lies, it is much more difficult than we imagined to improve the solution or come up with a new one.
It not only contains a lot of knowledge about quantum physics and optics, but also includes some knowledge about materials and device structures.
After all, Xu You was just a freshman in college and had only dabbled in a lot of knowledge, which was far from being a very professional level.
At this time, another professor in the laboratory put forward a new idea.
"I think we can consider using micro-nanostructured materials to extract photons radiated by quantum dots. For example, if there are suitable materials and an ideal structure can be designed for a pair of micropillars, it is entirely possible to improve the collection efficiency to a higher level."
The professor's name is Wu Hong. Apart from Wang Xiangwu, he is the professor with the highest rank and qualifications in the experimental group.
Wang Xiangwu listened to Wu Hong's proposal and fell into deep thought.
The so-called micro-nano structure materials refer to fine structure materials at the micron and nano-micron levels.
This structure is very precise, with sizes often in the tens or hundreds of nanometers.
Such precision-structured materials 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 kind of micro-nanostructure material from some materials, but it could only be said that he had a preliminary understanding of it.
It has not yet reached the point where it can be applied 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 them later to see if there are any suitable materials." Wu Hong said.
"Well, that's fine. Let's tentatively explore this direction. If you have any other plans, please feel free to contact me."
In fact, when he heard the word "materials", Xu You also thought of his father Xu Zhou.
Xu You was just wondering whether he should 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. If possible, I would then talk to Wang Xiangwu about this matter.
At this time, Xu You also understood a little bit what Luo Wenkun had said before, that scientific research is also about human relationships and social skills.
Just like Wu Hong knows the materials experts at Jinghua, this can be said to be a kind of network resource.
After all, when a scientific research project is large enough and involves a lot of things.
It is difficult to manage all the operations of a laboratory.
In this case, more experts from other industries are needed to work together.
Even the fact that Xu You obtained some metal atomic cluster materials through Xu Zhou can be said to be a kind of connection.
After the meeting, everyone felt better than before.
Although I don’t know how feasible it is, the project 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 worked on micro-nanostructure materials?"
After a while, Xu Zhou replied to Xu You.
"Son, although your father is a master of materials science in China, there are many types of materials. I mainly study metal materials. I have never worked with micro-nanostructure materials like this, and I don't know much about them."
Xu You was mentally prepared for this result.
Xu You also knows that as scientific research progresses, the research direction tends to become more specific.
For example, a student majoring in physics in undergraduate studies chooses condensed matter physics in his master's degree.
After getting his doctorate, he focused on the topic of superconductivity in condensed matter physics.
As long as we can make some breakthrough research results in this small direction.
You can complete your doctorate degree.
"Okay, I understand. I'll contact you if I have any questions."
Fortunately, Xu You had not told Wang Xiangwu before that his father was a material collector.
In this case, Xu You thought, let's wait for news from Professor Wu Hong first.
After contacting Jinghua's materials experts, Wu Hong also received some good news.
Jinghua's material experts have indeed done a lot of research related to micro-nano materials.
