We demonstrate a Purcell-enhanced single-photon source realized by the fabrication of a hybrid III–V/dielectric circular Bragg grating cavity directly bonded onto a piezoelectric actuator. Such a kind of photonic system offers the potential for broadband high photon extraction efficiency and spontaneous emission rate enhancement. This device allows for reversible spectral tuning of the embedded quantum dot emitters and pure triggered single-photon generation with g (2)(0) = (1.5 ± 0.05) × 10–3. By applying 18 kV/cm electric filled to the piezosubstrate, we achieve a tuning range larger than 0.78 meV for quantum dots in resonance with the cavity mode. Spontaneous emission lifetimes smaller than 200 ps, in conjunction with a systematic increase of the spontaneous emission rate on resonance with the broadband cavity mode, verify that our device operates deep in the Purcell regime. Our strain-tunable, broadband Purcell-enhanced device represents a crucial building block for scalable quantum technologies.

We determine the single mode condition and analyze the modes discrimination of 1.3 mum InP based photonic-crystal vertical-cavity surfaceemitting diode laser. To this aim we apply the fully vectorial, three dimensional Plane Wave Admittance Method and analyze a broad range of photonic-crystal parameters such as hole etching depth, distance between the holes and their diameters.

In this paper we present an extensive theoretical and numerical analysis of monolithic high-index contrast grating, facilitating simple manufacture of compact mirrors for very broad spectrum of vertical-cavity surface-emitting lasers (VCSELs) emitting from ultraviolet to mid-infrared. We provide the theoretical background explaining the phenomenon of high reflectance in monolithic subwavelength gratings. In addition, by using a three-dimensional, fully vectorial optical model, verified by comparison with the experiment, we investigate the optimal parameters of high-index contrast grating enabling more than 99.99% reflectance in the diversity of photonic materials and in the broad range of wavelengths.