The Variational-Effective index method is based on mixing the variational method(VM) and the effective index method(EIM), it can be used with very accuracy to simulate the field distribution.

变分有效折射率法是变分法（VM）和有效折射率法（EIM）的结合，它能够很精确地模拟光场分布情况；

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The Variational-Effective index method is based on mixing the variational method(VM) and the effective index method(EIM), it can be used with very accuracy to simulate the field distribution.

变分有效折射率法是变分法（VM）和有效折射率法（EIM）的结合，它能够很精确地模拟光场分布情况；

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