A design of RLC circuit analog for electromagnetically induced transparency like phenomenon
碩士 === 中華大學 === 電機工程學系碩士班 === 100 === A two-level resonant atomic system can be modeled by a simple LC circuit，and therefore a three-level EIT (electromagnetically induced transparency) system can be simulated by a two-loop circuit，in which two simple LC circuits are coupled to each other via a cap...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/43813437111496959435 |
| Summary: | 碩士 === 中華大學 === 電機工程學系碩士班 === 100 === A two-level resonant atomic system can be modeled by a simple LC circuit，and
therefore a three-level EIT (electromagnetically induced transparency) system can be simulated by a two-loop circuit，in which two simple LC circuits are coupled to each other via a capacitor coupling，in the same fashion，a four-level EIT system can also have a three-loop LC circuit analog via two capacitor couplings to observed .
We suggest to use the voltage source and the capacitors(the capacitors coupling on both sides loops) in the circuit act (current response) as the probe field and the control fields in atomic EIT，when two beams of laser irradiated boxed three-level atomic system in the same time will form the destructive interference，two-photon resonance occurs，destruction also eliminates the effective power and the absorption mechanism and the decay rate；cause the dielectric constant of the material the remaining vacuum real number (imaginary part is 0)，which is the EIT phenomenon .We used Multisim 12.0 (NI，circuit simulation software) simulate the quantum coherent effect of the RLC double-resonant circuit of EIT atomic group and analyzed the power spectrum in the circuit，and use Elvis II+ with Labview (NI，instrument control software) self - designed the spectral response of the actual measurement circuit of ultra-low-frequency spectrum analyzer，and finally we have very good effect on the RLC current analog .
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