In 1962, 50 years ago, Nick Holonyak Jr. and his team at General Electric invented LEDs. Even today, LED light is almost everywhere – from bridges to headlights to keychain flashlights, using LED light that looks brighter than the sun – but its initial development is full of uncertainty. Research work that competes with each other. At the time, LED was the direct result of another pioneering technology, the laser, and in the days that followed, LEDs continued to evolve and have now become the source of illumination for our homes and are used to transmit our data.
The Wired magazine design channel interviewed Helen Yack, now a professor at the University of Illinois, and asked him about the history of LEDs and the future of LEDs. The following is a summary of the content of this interview:
"Connecting": What is the initial market reaction of LED?
He Lunak: When I realized that I was also on the road to developing LEDs, I had beaten the whole world in the visible laser field with my own alloy. An editor of Reader's Digest called me in February 1963, pointing out the fact that LEDs would eventually cover the entire spectrum and become a source of white light. That was what happened at the time, but I think this happened like it was not as long as 50 years.
Wired: Laser?
He Lunak: There were a lot of speculations at the time that light might not be coherent, just like a microwave signal; or, if light energy is coherent, it could not be seen by the human eye, because before this, the human eye has always been Only incoherent light can be seen.
Although others thought that ruby ​​could not be a light source, a scientist named Theodore Maiman came up with the idea that ruby ​​could be used as a maser, but no one I used rubies to make lasers. He finally succeeded, I think it should be in May 1960, when he demonstrated how a laser was generated. After he showed the first laser, everything began to break away from the cage.
In 1962, Lincoln Laboratories of the Massachusetts Institute of Technology, led by Robert Rediker, said they made a diode that emits a lot of self-luminescence and can use it to emit Infrared i-line signal. When they released a report on such diodes at a meeting in July of that year, many of us said that it is possible to turn it into coherent light, such as lasers?
"Connect": Is this different from what Mehman has done?
Helen Yake: As far as Mehman's laser is concerned, it is a kind of flash similar to that used in photography. You can release a strong white light, then the white light is absorbed by the ruby ​​bar, and then the ruby ​​bar raises all the red chrome atoms to a higher state, and then releases them into a laser. That is a process in which the primary process drives the secondary process. All the light you see is a heat source, and the heat causes the atom to vibrate gently, releasing some kind of light. It is better to say that the heater is better than the illuminator.
The laser I am talking about is light that enters from one end and then exits from the other. In this path, it is itself a light generator, and that is a diode laser.
Wired: How big is the original LED?
He Lun Yake: Very small. Of course, you can make it bigger, and people have already done so. You know, in the field of semiconductor applications, semiconductors will always win, sweeping ordinary electronic products.
The Wired magazine design channel interviewed Helen Yack, now a professor at the University of Illinois, and asked him about the history of LEDs and the future of LEDs. The following is a summary of the content of this interview:
"Connecting": What is the initial market reaction of LED?
He Lunak: When I realized that I was also on the road to developing LEDs, I had beaten the whole world in the visible laser field with my own alloy. An editor of Reader's Digest called me in February 1963, pointing out the fact that LEDs would eventually cover the entire spectrum and become a source of white light. That was what happened at the time, but I think this happened like it was not as long as 50 years.
Wired: Laser?
He Lunak: There were a lot of speculations at the time that light might not be coherent, just like a microwave signal; or, if light energy is coherent, it could not be seen by the human eye, because before this, the human eye has always been Only incoherent light can be seen.
Although others thought that ruby ​​could not be a light source, a scientist named Theodore Maiman came up with the idea that ruby ​​could be used as a maser, but no one I used rubies to make lasers. He finally succeeded, I think it should be in May 1960, when he demonstrated how a laser was generated. After he showed the first laser, everything began to break away from the cage.
In 1962, Lincoln Laboratories of the Massachusetts Institute of Technology, led by Robert Rediker, said they made a diode that emits a lot of self-luminescence and can use it to emit Infrared i-line signal. When they released a report on such diodes at a meeting in July of that year, many of us said that it is possible to turn it into coherent light, such as lasers?
"Connect": Is this different from what Mehman has done?
Helen Yake: As far as Mehman's laser is concerned, it is a kind of flash similar to that used in photography. You can release a strong white light, then the white light is absorbed by the ruby ​​bar, and then the ruby ​​bar raises all the red chrome atoms to a higher state, and then releases them into a laser. That is a process in which the primary process drives the secondary process. All the light you see is a heat source, and the heat causes the atom to vibrate gently, releasing some kind of light. It is better to say that the heater is better than the illuminator.
The laser I am talking about is light that enters from one end and then exits from the other. In this path, it is itself a light generator, and that is a diode laser.
Wired: How big is the original LED?
He Lun Yake: Very small. Of course, you can make it bigger, and people have already done so. You know, in the field of semiconductor applications, semiconductors will always win, sweeping ordinary electronic products.
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