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One interesting challenge in bio-sensing, photovoltaics, imaging and other related fields is the identification of approaches for tuning the broadband absorption in thin slab materials. In recent years, interest has been focused on the study of the effects that two counter-propagating beams produce by interfering with each other. In this configuration both complete absorption or lossless transmission...
The field of nanophotonics has ushered in a new paradigm of light manipulation by enabling deep subdiffraction confinement assisted by metallic nanostructures. However, a key limitation which has stunted a full development of high‐performance nanophotonic devices is the typical large losses associated with the constituent metals. Although silver has long been known as the highest quality plasmonic...
A wavelength shift of 15 nm is obtained for near-infrared (1250 nm) pulses interacting with a temporally engineered Al-doped-ZnO layer. The underlying time-refraction process is driven by an intense, <100 fs pulse at 785 nm.
The fundamental problem of efficiently outcoupling high-k waves from hyperbolic metamaterials is approached with an in-plane configuration, and enhanced with adiabatic tapering. This strategy may allow for better efficiency of Purcell enhanced quantum sources.
In this talk, the physics of microring resonators is discussed in the classical and quantum regimes, in the context of the exploitation of chi-3 effects in these cavities as done by our group. Through the implementation of a novel microring pumping scheme and a quantum reinterpretation of the frequency comb, we present an integrated platform for the generation of quantum optical states spread over...
In this work, a design of ultra-compact plasmonic modulator is proposed and numerically analyzed. The device layout utilizes alternative plasmonic materials such as transparent conducting oxides and titanium nitride which potentially can be applied for CMOS compatible process. The modulation is obtained by varying the carrier concentration of the transparent conducting oxide layer and exciting plasmonic...
We report an integrated, CMOS-compatible source of multiplexed heralded photons, distributed over several wavelengths at standard communication channels and compatible with quantum memories. Our system operates in a self-locked mode without an external pump laser.
Increasing coupling of terahertz radiation into a low dispersion, broadband two-wire waveguide is an important issue to address. To resolve this, we demonstrate an active two-wire waveguide with higher performance compared to its passive counterpart.
A planar layout for an ultra-compact plasmonic modulator is proposed and numerically investigated. Our device utilizes potentially CMOS compatible materials and can achieve 3-dB modulation in just 65nm and insertion loss <1dB at telecommunication wavelengths.
We experimentally demonstrate both the lifetime reduction and the enhancement of single-photon emission from nitrogen-vacancies in nanodiamonds coupled to a TiN/Al0.6Sc0.4N superlattice. Our results pave the way towards future CMOS-compatible integrated quantum sources.
We demonstrated a new regime of operation for ultrafast mode-locked lasers that we termed “burst-mode” modelocking. By exploiting an integrated 11th order micro-ring resonator, our scheme achieves stable operation resulting in a mode-locked train of pulses at 650 GHz with a burst mode envelope of 40 ps at 7.12 MHz.
In this work we report low-loss insulator-metal-insulator plasmonic interconnects using the CMOS-compatible material titanium nitride. The mode profile shows the characteristic exponential decay of the plasmonic regime, with propagation losses as low as 0.79 dB/mm.
We report an integrated, CMOS-compatible source of multiple and independent photon pairs at different wavelengths compatible with standard fiber communication channels and quantum memories. It operates in a self-locked mode with no external pump laser.
We demonstrate orthogonally polarized photon pair generation via spontaneous non-degenerate four-wave-mixing (FWM) of orthogonally polarized pumps in a CMOS compatible micro-ring resonator by fully suppressing stimulated FWM. Photon coincidences and optical parametric oscillation are measured.
We report an on-chip all-optical CMOS-compatible radio frequency spectrum analyzer with a bandwidth exceeding 2.5 THz, and use it to measure the intensity power spectra of mode-locked lasers with repetition rates up to 400 GHz.
We experimentally demonstrate a new SOI based optical filter design comprising of a photonic crystal cavity and a low index bus waveguide and realise high extinction ratios and low insertion losses.
Epitaxial CeBiIG and CeYIG films were grown on (100)-oriented Gd3Ga5O12 substrates by pulse laser deposition. We achieved strong FR of 0.65 deg/μm and 0.52 deg/μm at 1.55 μm for epitaxial CeBiIG and CeYIG films, respectively.
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