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a Simulation setup for the analysis of the distributed Bragg reflector. b Simulated stop band for a 16 layer silicone dioxide/tantalum pentoxide distributed Bragg reflector. The stop band shows a reflectance of over 99.9% between 600 and 750 nm (normal incidence)
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We present modelling results for efficient coupling of nanodiamonds containing single colour centres to polymer structures on distributed Bragg reflectors. We explain how hemispherical and super-spherical structures redirect the emission of light into small numerical apertures. Coupling efficiencies of up to 68.5% within a numerical aperture of 0.3...
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This chapter covers recent developments in the field of hybrid quantum photonics based on color centers in nanodiamonds and Si3N4-photonics towards a technology platform with applications in quantum information processing and quantum information distribution. The methodological approach can be divided in three main tasks. First, the fabrication and...
Citations
... Deterministic placement improves emission from photon sources by enhancing the spatial overlap of guided mode maxima and the photon sources (Purcell enhancement) and/or the spectral overlap of excitation/emission lines and the cavity modes [5]. While there have been few reported efforts on deterministic placement of emitters, those reported results indicate that deterministic placement improves the excitation of the emitters [8], collection of their signals [9], and coupling efficiency between multiple optical elements and materials [10]. Along with deterministic placement, design structures can also improve the efficiency of hybrid devices by either altering the cavity modes to enhance emission or matching the emission modes to the modes of the collection system [11]. ...
... Efficient harnessing of the emission light can be achieved via geometrical [12], grating/antenna [13], and inverse design methods [14]. Geometrical optics solutions to convert a greater part of the omnidirectional emission of emitters into unidirectional emission patterns include structures such as super spheres [9,10] and Weierstrass geometry solid immersion lenses (SILs). These spherical shapes can be achieved via standard lens fabrication approaches, but the increase in efficiency of the collection that has been achieved is quite limited [11]. ...
Collecting significant and measurable signals from the typically omnidirectional emission of nanoscale emitters is challenging. To improve the collection efficiency, it is essential to deterministically place the emitters in desired locations and design mode converters to match the modes of emission to those of the collection system. In this Letter, we propose the deterministic placement of nanoscale emitters using a pick-and-place technique called polymer-pen lithography. We demonstrate the concept with upconversion nanoparticles placed deterministically at the focus of three-dimensional-printed ellipsoidal micro-lenses. A significant part of the forward-going emission is collimated leading to increased collection efficiency, even at low numerical apertures of the collecting optics. The proposed approach lends itself to hybrid integration for fiber-to-chip and on-chip applications.
Cavities are the ideal platform to investigate the light–matter interactions because they strongly confine and modulate the photons. Two‐dimensional (2D) materials such as transition metal dichalcogenides and hexagonal boron nitrite have unique electronic and optical properties, exhibiting excellent optical performance at the atomically thin nanoscale. The integration of 2D materials into cavities raises challenges in both the design and fabrication technologies. In this manuscript, the recent results of 2D‐material cavities are reviewed, in which the quality factor ( Q ‐factor) and smaller mode volume have been greatly improved. The nanostructure of cavities has been optimized to provide the homogeneous environment by encapsulating the 2D materials with hBN or polymer, which is crucial to improve the excitonic qualities and emission stability. These cavities are capable to integrate the 2D materials and their heterostructures, and enable the novel light–matter interaction phenomena such as the Bose–Einstein condensation of exciton‐photon polaritons. In addition, 2D materials are sensitive to the local environment such as the deformation arising from the strain or vibration, and thereby, enable the multi‐modal interaction with other physical degrees of freedom. These 2D‐material cavities indicate great potentials in the applications in quantum optical devices and quantum photonic technologies.
