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Optically confined structure is a fundamental topic in both basic and applied physics including potential application in information engineering, biological and medical sciences, sensing. In this scenario one-dimensional photonic crystals have been widely investigated and still remain an outstanding tool for new photonics, being the simplest system to exhibit a so-called photonic bandgap and therefore...
The emission and propagation of light in disordered media has always been a topic of interest in science, mainly because in nature this is the most common way of light emission and propagation. This research topic received a particular attention after the report of the first highly efficient random laser (RL) [1]. Indeed a large number of investigations discussing the fundamentals and the applications...
The Petawatt Field Synthesizer (PFS) is an OPCPA driven light source that is currently being developed at the Max-Planck-Institut für Quantenoptik in Garching, Germany. The target parameters are few-cycle, waveform-controlled light pulses with a repetition rate of 10 Hz and a peak power in the Petawatt regime [1]. The system relies on a cascaded broadband OPCPA that is pumped by a picosecond, all-diode-pumped...
Nanowaveguides (NWs), typically semiconductors, are used as nanolasers [1], as optical switching devices [2] and as imaging probes [3]. These applications can be further complemented by fully controlling the guided modes within the NW. Here, we select second-harmonic (SH) modes in the visible (VIS) and near-infrared (NIR) wavelength ranges by using SH modal phase-matching [4]. Therefore, only one...
The past few years have witnessed an unprecedented development in the field of perovskite metal halide solar cells. Thanks to the excellent optoelectronic properties of the semiconducting perovskite thin films, organometal trihalide perovskite based photovoltaic devices have achieved efficiencies as high as 22% [1]. While much of the research activities on perovskite have focused on improving the...
Photonic devices that can guide, transfer or modulate light are highly desired in electronics and integrated silicon photonics. Through the nonlinear processes taking place during ultrafast laser-material interaction, laser light can impart permanent refractive index change in the bulk of materials, and thus enables the fabrication of different optical elements inside the material. However, due to...
In quantum optics, the statistical properties of the emitted photons define the nature of a light source. The black body is a well known example of source with large fluctuations and for which the statistics of the photon number is P(n) ≈ 1/〈 N 〉e−n/(n), if 〈n 〉 ≫ 1 with second order coherence g2 (0) = 2 (thermal light).
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