title: Interplay between six wave mixing photonic band gap signal and second-order nonlinear signal in electromagnetically induced grating.
abstract: For the first time, we experimentally and theoretically research about the second-order nonlinear signal (SNS) including electromagnetically induced absorbing (EIA) and electromagnetically induced gain (EIG), six wave mixing band gap signal (SWM BGS) resulting from photonic band gap structure in an inverted Y-type four level system with the electromagnetically induced grating. The interplay between the SNS and SWM BGS is illustrated clearly for the first time. When we change the frequency detuning to make the SWM BGS and SNS overlap, the SWM BGS is suppressed and the intensity of SNS is strongest near the resonance point. We can control the intensity of the SWM BGS and EIG caused by the classic effect through changing the power of coupling field. And the changes on the EIA generated by the quantum effect are obtained by changing the power of dressing field. Since the SWM BGS is the enhancement of the four wave mixing band gap signal (FWM BGS), when we set FWM BGS as the input and SNS as the modulation role to control the amplification amplitude for the FWM BGS in our scheme, the adjustable optical amplifier can be obtained.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Wang
authors.forename: Mengqin
authors.initials: M
authors.lastname: Gao
authors.forename: Zakir
authors.initials: Z
authors.lastname: Ullah
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.forename: Haixia
authors.initials: H
authors.lastname: Chen
authors.forename: Hong
authors.initials: H
authors.lastname: Gao
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Zhang