A mid-infrared band modulator and its preparation method
A technology of infrared band and modulator, which is applied in the field of mid-infrared band modulator and its preparation, can solve the problems of narrow optical bandwidth, etc., and achieve the effect of reducing thermal mismatch and being easy to realize
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[0034] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0035] The disclosure provides a mid-infrared band modulator and a preparation method thereof. By bonding the N-type InSb substrate with Si material, the N-type InSb substrate is etched into a ridge waveguide, and the Or the ridge area protruding from the flat area is diffused or ion-implanted to form a P-type InSb structure, and the N-type InSb structure and the P-type InSb structure form a PN junction, and a narrow neutral region I region is formed in the middle of the PN junction. When the external mid-infrared light is input, the carrier concentration of this P(I)N structure InSb material changes with the increase of the applied voltage, and the refractive index and absorptivity increase accordingly, absorbing in t...
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