Second-harmonic generation in a doubly resonant semiconductor microcavity

Abstract

We demonstrate second-harmonic generation in a doubly resonant semiconductor microcavity. The monolithic cavity consists of an AlGaAs active medium sandwiched between two AlGaAs/AlAs dual-wavelength mirrors. The mirrors do not have any apparent periodicity because, unlike single- or dual-wavelength Bragg reflectors, they are engineered with dispersion taken into account. Quasi-phase matching is obtained by addition of the appropriate phases at reflection so as to compensate for the dephasing between the fundamental and the second-harmonic fields.

Amorphous Silicon Nitride: a suitable alloy for optical multilayered structures

“…5 shows the good agreement between theoretical calculations and experimental results dealing with linear transmittance, while non-linear optical characterizations are described elsewhere [10]. It is worth to underline that the double resonance condition is obtained with periodic DBRs, yielding an improvement over a previous approach [11], where the double resonance was obtained with non-periodic mirrors. Indeed, following this cavity lay-out, the resonant features are robust with respect to moderate systematic deviations of the layer thicknesses plausible in realistic growth performed by PECVD.…”

Recent advances in phase matching of second‐order nonlinearities in monolithic semiconductor waveguides

“…The concept of QPM has proven to be very useful in order to enhance nonlinear conversion. Recently, there has been some interest for resonant SHG in Bragg multilayers, also called finite one-dimensional photonic crystals [45][46][47][48][49][50][51][52][53][54][55][56][57]. Strong enhancement of SHG takes place when the pump and/or harmonic waves are resonant with band-edge states that are formed in the finite structure.…”

Giant microcavity enhancement of second-harmonic generation in all-silicon photonic crystals

“…The recently observed enhancement of secondharmonic generation ͑SHG͒ in microcavities with a nonlinear spacer is due to the confinement of the SH 8,9 or fundamental 10 radiation between the linear Bragg reflectors or the metallic mirrors. The SHG enhancement is also obtained in MC with dual-wavelength nonperiodic Bragg reflectors 11 or with the spacer fabricated from a quasiphasematching stack of alternating GaAs and AlAs layers. 12 Since the resonant optical field significantly expands into Bragg reflector the constructive SHG buildup in microcavities can be achieved if both the MC spacer and Bragg reflectors are composed from nonlinear materials.…”