The manufacturer added an extra head to green laser pointer

Waves with the tunnel wall reflected waves destructive interference occurs and can not exist in the tunnel, so listen to fail. Atoms miniature antenna, radio antenna small, its resonance frequency is much higher, reaching 1014 Hz, the corresponding wavelength in the 1? M, therefore if possible in the excited states of atoms on the micrometer "mini-tunnel", the atom can radiate photons can not exist in the "micro tunnel, atomic radiation no photon long stay in the excited state. The miniature antenna radiation and absorption properties will change with the different micro-tunnel ".
The manufacturer added an extra head to green laser pointer
In 2006, Shuai Chen and other scholars used the 87 Rb atom quantum memory effect and save a single photon, for use when needed. This single-photon sources is ideal for the implementation of future large-scale quantum communication and linear optical quantum computing. They believe that the single-photon source for quantum communication networks provide a good security guarantees. Is also committed to a single collection of atoms excited by long-term memory time, and how to single-shot efficient conversion of a single photon. ?? In the experiment, using Raman scattering. When the laser strikes the atom, the single-shot can be transformed into a single photon. To detect a new photon can be single-spin excitations, which can produce quantum memory.  It is the switch at the front end of  green laser pointer
Rubidium atoms initially have been refined to the 5S1 / 2, F = 2 state (5S1 / 2, F = 1 state). D1, D2 and D3, consistent with measurements done in 2ns. Finally, their work come to a collective state of life is critical for the quality of the single-photon generation rate, the collective state of the time consistency by the the MOT surrounding the residual magnetic field and the atomic thermal motion, the latter effect because of the atomic cloud very low temperature can be ignored. In certain circumstances, can be life 300? S single-photon source, the probability of up to 95%. Atom body-based single photon source can work in a particular mode or time controlled by the feedback mode, and has a narrow-band, high-quality and controllability of the advantages. So that the normal use of green laser pointer  can be ensured