Chapter 58 Come, let me test you
Taking advantage of the weekend when he had no classes, Xu You decided to visit Wang Xiangwu's laboratory.
Wang Xiangwu and Xu You had said before that there was a doctor named Zhao Weijia in the laboratory who was in the laboratory every day.
Whether it is a weekday or a holiday, we are open almost all year round.
At most, I would just go home for a few days during the Chinese New Year.
When you get to the laboratory, just go find Zhao Weijia.
At eight o'clock in the morning, Xu You arrived at the door of Wang Xiangwu's laboratory.
"Hey, why didn't you open the door?"
Xu You was not in a hurry and stood there waiting for a while.
More than ten minutes later, a man walked over slowly, holding a key in his hand.
And stopped in front of Wang Xiangwu's laboratory.
Xu You glanced at the man.
He is overweight, has sparse hair, dresses shabbily, and looks listless.
This is not the same as the image of a doctor that Xu You imagined .
"Hello, are you Dr. Zhao Weijia?" Xu You asked tentatively.
"Yes, you are?"
"Hello, senior brother. My name is Xu You. Professor Wang Xiangwu asked me to come to the laboratory for a visit and internship."
"Oh, I remember now. Teacher Wang told me about this. Let's go in together."
Zhao Weijia was not surprised by this.
Occasionally, Wang Xiangwu would indeed look for some outstanding undergraduates to visit and intern in his laboratory.
After entering the laboratory, Zhao Weijia was eating buns while running the computer.
He did not pay attention to Xu You's meaning.
Xu You didn't ask any more questions, but stood aside and looked at the environment in the laboratory.
Various experimental equipment that I had only seen in books and on the Internet before.
Xu You finally had the chance to witness it with his own eyes.
In his excitement, Xu You even wanted to touch those tempting experimental equipment.
But Xu You knew that he had just arrived at the laboratory and could not touch the experimental equipment casually.
Zhao Weijia did not deliberately ignore Xu You, but because his own scientific research tasks were indeed very heavy, he had to get the equipment and programs running first.
It was not until all the preparations were completed that Zhao Weijia remembered that there was a person named Xu You in the laboratory.
Zhao Weijia knew that those who were invited by Wang Xiangwu to the laboratory were all outstanding undergraduates.
But no matter how outstanding you are, you can never compare with a PhD with rich scientific research experience.
Zhao Weijia decided to test Xu You a little so that his future junior fellow apprentice could realize his own limited knowledge.
Only then can you learn in the laboratory with an open mind.
"Is this your first time in a lab?"
"Yes, for the first time."
"Seeing these things, you all feel very strange right? It's okay, I felt the same when I first came here, I had no idea what was what."
In fact, although it was the first time that Xu You saw these devices, he could mostly call out their names.
But since Zhao Weijia said so, Xu You couldn't refute anything.
"Come, let me show you the topic I'm researching. Can you tell what I'm researching?"
Zhao Weijia knew that Xu You definitely had no idea what these things were.
Wait until Xu You shakes his head in confusion, and then explain it to him.
Making his fellow junior students feel how knowledgeable he is is one of the few pleasures that Zhao Weijia enjoys.
Xu You looked at the contents on the screen and roughly understood what was on the screen.
"Brother, if I remember correctly, this should be the phase and wavefront distribution of the optical vortex."
Zhao Weijia was stunned when he heard this.
"How do you know all this?"
The research direction that Zhao Weijia is pursuing is rarely studied in the country.
Only a few laboratories, including Jilin University, conduct research in this direction.
"I've read it in a book before and remembered it." Xu You said truthfully.
While studying competition in physics, Xu You had read nearly a hundred books.
Although I don’t understand some things in depth, I still have a general idea of them.
"Then let me ask you, what method is used to prepare the optical vortex?"
Although Zhao Weijia was thrown off balance by Xu You's answer, he quickly calmed himself down and continued asking.
Originally, Zhao Weijia did not intend to ask such a difficult question. After all, for undergraduates, this question was too beyond the syllabus.
Zhao Weijia just wanted to wait for Xu You to shake his head and then explain it to Xu You.
"You can use the method of controlling the phase. I remember that the most direct method is to use a spiral phase plate to force a spiral phase to be added to the fundamental mode Gaussian light field, so that an optical vortex can be obtained."
"What if there is no spiral phase plate?" Zhao Weijia asked again.
"Well... you can also load a fork-shaped diffraction grating on the spatial light modulator to generate a spiral phase." Xu You rolled his eyes, trying to recall.
"Then what is the difference between these two methods!" Zhao Weijia began to get anxious.
"The first method only modulates the phase of the incident light field and is polarization-insensitive. The second method implements phase modulation for a light field of a specific polarization and is polarization-sensitive."
After Xu You answered again, the air in the laboratory seemed to freeze.
For a moment, Zhao Weijia didn't know what question to use to make things difficult for Xu You.
"Brother, did I answer wrong?"
Seeing that Zhao Weijia didn't say anything, Xu You thought that his answer was wrong.
"No... the answer is quite good. The theoretical knowledge is quite solid."
This was the first time that Zhao Weijia ran into a snag in front of his junior fellow student and he could only smile awkwardly.
Not to mention undergraduates, even Zhao Weijia couldn't answer these questions when he was studying for his master's degree.
"Are you a sophomore or a junior?"
Zhao Weijia knew that freshmen would not take Wang Xiangwu's class, so he subconsciously thought that Xu You was at least a sophomore.
"Start of freshman year."
"Starting freshman year?" Zhao Weijia asked puzzledly.
"I was recommended by a competition and will not officially enroll until next year. I will audit some courses in school in advance."
After hearing Xu You's answer, Zhao Weijia became even more puzzled.
Why would Wang Xiangwu allow a high school student to come to the laboratory for internship?
But looking at Xu You's answer just now, it seems that he does have a very solid foundation.
It seems that this child still has some outstanding qualities.
Fortunately, Xu You is just a high school student after all, and he doesn’t understand many things in Zhao Weijia’s paper.
This finally gave Zhao Weijia the opportunity to demonstrate his knowledge.
After all, Zhao Weijia is a PhD in physics from Ji University. There are many things that cannot be known without going through a long scientific research process.
Xu You listened to Zhao Weijia's explanation carefully and nodded repeatedly.
This made Zhao Weijia's impression of Xu You better and better.
Not only does he have a good theoretical foundation, but he also does not have any pride.
Another thing that surprised Zhao Weijia was.
I originally thought Xu You was just here for a visit.
In the end, he stayed there until ten o'clock in the evening just like me.
It was not until I left that Xu You followed me.
From then on, Xu You would often come to the laboratory for internship whenever he had time.
When Zhao Weijia is not busy, he will also explain his knowledge and experience to Xu You.
