Diamond nanophotonics

Abstract

SummaryWe demonstrate the coupling of single color centers in diamond to plasmonic and dielectric photonic structures to realize novel nanophotonic devices. Nanometer spatial control in the creation of single color centers in diamond is achieved by implantation of nitrogen atoms through high-aspect-ratio channels in a mica mask. Enhanced broadband single-photon emission is demonstrated by coupling nitrogen–vacancy centers to plasmonic resonators, such as metallic nanoantennas. Improved photon-collection efficiency and directed emission is demonstrated by solid immersion lenses and micropillar cavities. Thereafter, the coupling of diamond nanocrystals to the guided modes of micropillar resonators is discussed along with experimental results. Finally, we present a gas-phase-doping approach to incorporate color centers based on nickel and tungsten, in situ into diamond using microwave-plasma-enhanced chemical vapor deposition. The fabrication of silicon–vacancy centers in nanodiamonds by microwave-plasma-enhanced chemical vapor deposition is discussed in addition.

Biexponential decay and ultralong coherence of a qubit

“…However, due to its structural properties the LDME exclusively predicts polarization decays of exponential kind, corresponding to Lorentzian profiles for the susceptibility. Precisely such features are violated in a plethora of experimental findings ranging from electron/nuclear spins [16][17][18][19][20] or nitrogen-vacancy (NV) centers [21,22] to chromophoric molecules [23,24] which display a biexponential decay of the polarizations leading to two T 2 times, a short and a long one. This decay process was clearly associated to homogeneous non-Lorentzian susceptibility profiles in quantum dots (QDs) [25][26][27][28][29][30][31] and NV centers [32,33].…”

“…Moreover, the crossover from an oscillatory towards a biexponential damping has been observed for the spin dynamics in a 2D electron gas [86]. More generally, a biexponential decay was found in spins [16,[18][19][20], NV centers [21,22], light-harvesting complexes [23,24] or in QDs [17,[25][26][27][28][29][30][31]82]. To understand which physical mechanisms produce these unorthodox decays, one should investigate each setup thoroughly.…”

Новые Линии Люминесценции В Полученных Методом Химического Газофазного Осаждения Наноалмазах

“…Узкая линия 699. 4 .2) nm. Эти ли-нии могут быть обусловлены одиночными центрами SiV в областях с различными внутренними напряжениями в наноалмазах [11,13].…”

“…В последние годы большое внимание уделяется со-зданию и исследованию центров окраски в алмазе, излучающих в видимой и ближней ИК области спек-тра [1][2][3][4][5][6][7]. Благодаря таким свойствам алмаза как ши-рокая запрещeнная зона, высочайшая теплопроводность и твeрдость, химическая инертность, высокая темпе-ратура Дебая, радиационная стойкость этот материал является исключительно удачной матрицей для цен-тров окраски [8].…”

Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors

“…In this review, we focus on the nanostructure types suitable for scanning probe sensing. For more complete recent reviews of diamond nanophotonics in the context of quantum information, see [94][95][96][97]. In essence, photonic nanostructures suitable for scanning probe sensing consist of a roughly tip-shaped nanophotonic structure on a thin (typically <1 µm) diamond mounting structure, as shown in Figure 6a.…”