It has been shown that the quantum Zeno effect can be used to inhibit the evolution of a quantum state, for example the transition of a particle of a two-state system would be hindered if it was observed frequently enough. The observations can be realized by an optical pulse source at very high pulse repetition rate. The effect could be used to realize the power amplification in RF or THz domain without population reversal because the simulated absorption from lower state could be suppressed. So far, some applications of Zeno effect have been demonstrated in a few material systems which are mostly gaseous state or trapped atoms or ions. In this paper we designed an experiment to show the Zeno effect in a solid-state material, i.e. bilayer graphene.
Frequent measurement can suppress the transitions between different quantum states. This quantum physics phenomenon can play a very good role in the state control. This effect can be helpful to the laser amplification technology. Therefore, this article attempts to use this quantum effect to realize the amplification without population inversion. The article first introduce this phenomenon, and then explain what frequent measurements are. Finally, a simple model is simulated by using hydrogen atom system as a medium for optical amplification without population inversions.
We demonstrated experimentally a new method for generation of linearly chirped light waves with almost perfect linearity over a broad range of about 800 GHz. The external modulation method that we adopt can maintain frequency jitters at a very low level by avoiding relaxation oscillation effects which are an intrinsic property in intra-cavity modulation methods. The linearly chirped light could provide an excellent time-frequency mapping tool for wide-range applications.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.