Laser pointers were manufactured in the 1960s. This use of powerful smoke to transfer to the substrate takes about 2-10 minutes, and the hexagonal nanowires can reach 2-10 microns. Nanowires with a diameter of 20 to 150 nm naturally form a laser cavity. The hexagonal cross-section nanowire sample at room temperature was pumped by the fourth harmonic of a Nd:YAG Laser pointer (wavelength 266 nm, pulse width 3 ns), and the injected laser beam was incident on the nanometer at an angle of 10 degrees. On the axis of symmetry of the straight line. When changing the emission spectrum, as the power increases, the process of laser generation can be observed. The width of the ridge is much smaller. It is these narrow line widths and rapid increases in emission energy that can be used to determine the stimulated emission of nanowires. In the laser pointer, the first two are already available. The study also found that the laser pointer only needs about 100 microamperes of current during operation. Recently, researchers reduced this photon line to one-fifth of a micron. At this scale, the number of photons in this structure is less than 10, which is close to the conditions required for energy-free operation, but the number of photons has not been reduced to such a limit. Researchers at the Massachusetts Institute of Technology recently sent excited helium atoms one-to-one with a laser pointer. After 50 years of development, laser technology has emerged from experimental exploration and embarked on a practical road. The current technology has been combined with multiple disciplines to form many application technologies, such as optoelectronic technology, medicine and photon laser biology, laser detection and measurement, laser holography, laser chemistry, guided laser, and controllable laser core. Fusion and so on. The emergence of these intersecting technologies and new disciplines has continuously promoted the development of traditional and emerging industries.
As the current intensity increases, the color of the light becomes unique and the wavelength is relatively short. In this case, the light emitted by the cadmium sulfide nanowires is a green laser. When current flows through this structure, the ends of the cadmium sulfide nanowires begin to emit blue- Green laser pointer with a wavelength of about 490 microns. Each atom emits a useful photon. In addition to improving efficiency, operations can also be used to gain speed. Some green laser pointers can rotate more than 20 billion times per second, making them suitable for fiber optic communications.As we all know, the three elements that produce laser light are active material, pump source and resonant cavity.
