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The schematic structure of the resonance cavity for SHG with high efficiency. ( and are optical dielectric mirrors; M is the working media; and stand for the amplitudes of the FW and SHW out of the cavity, respectively; means the amplitude of the FW; and and are the amplitudes of SHW at the interface of and M and the interface of M and , respectively).
The map of as a function of and . ( and are the reflectance and transmittance of , is the reflectance of , L is the length of the cavity, and is the wave vector mismatch).
Calculated SHG efficiency for GaAs cavity with different ( is the reflectance of mirror ). The pump power is .
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