Time Circular Birefringence in Time-Dependent Magnetoelectric Media.
Ruo-Yang Zhang1,2, Yan-Wang Zhai3, Shi-Rong Lin3
1Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin, 300071, China.
Scientific Reports
|September 3, 2015
Summary
Light in time-dependent axion-type magnetoelectric media exhibits time circular birefringence (TCB), leading to phenomena like time refraction and reflection. This research proposes practical methods for observing these effects.
Area of Science:
- Optics and Photonics
- Condensed Matter Physics
- Electromagnetism
Background:
- Time-dependent media offer unique light manipulation capabilities.
- Axion-type magnetoelectric (ME) media present novel electromagnetic properties.
Purpose of the Study:
- To investigate light propagation in time-dependent axion-type ME media.
- To identify and name novel optical phenomena arising from time-varying media.
Main Methods:
- Theoretical analysis of light-matter interaction in time-dependent ME media.
- Investigation of wave propagation across temporal interfaces.
- Simulation of Gaussian pulse behavior.
Main Results:
- Discovery of "time circular birefringence" (TCB): two degenerate circularly polarized modes.
- Observation of "time refraction" and "time reflection" at temporal interfaces.
- Demonstration of the "time Faraday effect" with rotating polarization axes.
- Identification of pulse trapping and intensity growth in non-traveling-wave bands.
Conclusions:
- Time-dependent ME media enable novel light manipulation, including TCB, time refraction, and time reflection.
- The proposed phenomena, including the time Faraday effect, are experimentally feasible.
- Practical realization involves molecular fluids with time-varying fields.
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