Single-photon source based on NV center in nanodiamond coupled to TiN-based hyperbolic metamaterial

Shalaginov, Mikhail Y.; Vorobyov, Vadim; Liu, Jing; Ferrera, Marcello; Акимов, А. В.; Lagutchev, Alexei; Smolyaninov, Andrey N.; Klimov, Vasily; Irudayaraj, Joseph; Kildishev, Alexander V.; Boltasseva, Alexandra; Shalaev, Vladimir M.

doi:10.1364/cleo_at.2014.jtu4a.38

Cited by 6 publications

(8 citation statements)

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“…This last case has achieved an enhancement of SE of a factor of 3, relative to the emission on a cover glass. Further by introducing a metalloid as metamaterial rather than gold, such as TiN, with lower dissipative losses, a SE enhancement close to 10 for a perpendicular dipole was predicted (5.5 for the average dipole orientation) with an experimental average enhancement of a factor of 4 [26].…”

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confidence: 94%

Hyperbolic metamaterial resonator–antenna scheme for large, broadband emission enhancement and single-photon collection

et al. 2018

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We model the broadband enhancement of single-photon emission from color centres in silicon carbide nanocrystals coupled to a planar hyperbolic metamaterial (HMM) resonator.The design is based on positioning the single photon emitters within the HMM resonator, made of a dielectric index-matched with silicon-carbide material. The broadband response results from the successive resonance peaks of the lossy Fabry-Perot structure modes arising within the high-index HMM cavity. To capture this broadband enhancement in the single photon emitter's spontaneous emission, we placed a simple gold based cylindrical antenna on top of the HMM resonator. We analyzed the performance of this HMM coupled antenna structure in terms of the Purcell enhancement, quantum efficiency, collection efficiency and overall collected photon rate. For perpendicular dipole orientation relative to the interface, the HMM coupled antenna resonator leads to a significantly large spontaneous emission enhancement with Purcell factor of the order of 250 along with a very high average total collected photon rate (CPR) of about 30 over a broad emission spectrum (700 nm -1000 nm). The peak CPR increases to about 80 at 900 nm, corresponding to the emission of silicon-carbide quantum emitters. This is a state-of-the art improvement considering the previous computational designs have reported a maximum average CPR of 25 across the nitrogen-vacancy centre emission spectrum, 600 nm to 800 nm with the highest value being about 40 at 650 nm.

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confidence: 94%

Hyperbolic metamaterial resonator–antenna scheme for large, broadband emission enhancement and single-photon collection

et al. 2018

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“…The observed fluorescence intensity is typically limited by the inefficiency of photon collection. To combat this inefficiency, various photonic and plasmonic approaches have been tried such as solid immersion lenses [20][21][22], photonic nanowires [23], cavities [24][25][26][27][28], plasmonic apertures [29], nanoantennas [30,31], waveguides [32][33][34] and metamaterials [35]. These structures work by modifying the near-field and farfield behavior of the emission thus drastically enhancing the collection efficiency.…”

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confidence: 99%

“…The TiN film's SPP modes [55] contribute to the local PDOS [51] and increase the radiative rates of the NVEs [35]. Correspondingly, the lifetimes measured on TiN area range from 7.5 to 12.5 ns.…”

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Electron spin contrast of Purcell-enhanced nitrogen-vacancy ensembles in nanodiamonds

et al. 2017

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Nitrogen-vacancy centers in diamond allow for coherent spin state manipulation at room temperature, which could bring dramatic advances to nanoscale sensing and quantum information technology. We introduce a novel method for the optical measurement of the spin contrast in dense nitrogen-vacancy (NV) ensembles. This method brings a new insight into the interplay between the spin contrast and fluorescence lifetime. We show that for improving the spin readout sensitivity in NV ensembles, one should aim at modifying the far field radiation pattern rather than enhancing the emission rate.Nitrogen-vacancy color centers (NV) in diamond are fluorescent lattice defects resulting from a vacancy and an adjacent nitrogen substitution [1,2]. These color centers have proven to be excellent testbeds for novel nanoscale optical devices.Ultrasensitive electromagnetic field [3][4][5][6][7][8], strain [9,10], pressure [11], and temperature [12,13] sensors as well as integrated quantum information processors [14][15][16] operating at ambient conditions have been prototyped using NVs. These capabilities are in large part due to the unique properties of the NV's electron spin, which may be optically initialized and manipulated by microwave signals [17,18]. The NV exhibits a spin-dependent fluorescence rate, which can be used for optical spin state readout [19]. We have calibrated the laser power using saturation measurements to ensure that both nanodiamonds on sapphire and TiN experience a similar optical excitation rate opt 1.5 MHz k [51]. For larger pump powers, we found that the contrast 1 T C drops and almost completely vanishes in strong saturation [51]. The origin of this effect, which is still under investigation, can be attributed to the charge exchange processes involving proximal NV centers and/or nitrogen impurities. Such dynamics may be especially pronounced in dense ensembles like ours, e.g. due to Auger-type effects. This effect makes it impractical to work in the saturation regime and limits the observable spin contrast values.Before rigorously investigating the observed dependence of spin contrast on fluorescence lifetime, we present a qualitative explanation, based on the NV level structure (Figure 4(a)). For simplicity, in this discussion we assume that the optical excitation rate is much lower than all the level decay rates. Following the absorption of a photon, both the excited state (ES) and the singlet levels relax into the ground state (GS) levels before the next photon is absorbed. The excited states (ES) of the s 0 m  and s 1 m  subsystems (i.e. levels 0e and 1e respectively) have equal radiative decay rates ( rad k ) into their respective ground states (GS) 0g and 1g . However, the fluorescence rate of the s 0 m  subsystem is higher, because the non-radiative decay of 0e through the singlet state s is less probable than that of 1e ( Here,is the rate of spin-conserving direct ES decay, opt k is the optical pumping rate, () cross i k are the intersystem crossing rates from 0e and 1e to the singlet state...

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“…Hyperbolic metamaterials (HMMs) (see Figure 8) are known for their isofrequency contour and broadband singularity in the density of photonic states, which have led to many new photonic and optical applications, including the substrate for molding spontaneous emissions into a directional beam and the "rainbow trapping" structure for broadband light absorption [25,[86][87][88]. The effective medium theory can describe the effective permittivity of such an artificial anisotropic medium as:…”

Section: Hyperbolic Metamaterials Absorbersmentioning

confidence: 99%

Artificial Surfaces and Media for Electromagnetic Absorption and Interference Shielding

Chen¹,

Farhat²,

Ye³

et al. 2022

Recent Topics in Electromagnetic Compatibility

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The rapid advent of radio-frequency (RF) and microwave technologies and systems have given rise to serious electromagnetic pollution, interference and jamming for high-precision detection devices, and even threats to human health. To mitigate these negative impacts, electromagnetic interference (EMI) shielding materials and structures have been widely deployed to isolate sophisticated instruments or human settlements from potential EMI sources growing every day. We discuss recent advances in lightweight, low-profile electromagnetic absorbing media, such as metamaterials, metasurfaces, and nanomaterial-based solutions, which may provide a relatively easy solution for EMI shielding and suppressing unwanted RF and microwave noises. We present a general review of the recent progress on theories, designs, modeling techniques, fabrication, and performance comparison for these emerging EMI and electromagnetic compatibility (EMC) media.

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Single-photon source based on NV center in nanodiamond coupled to TiN-based hyperbolic metamaterial

Abstract: We experimentally demonstrate both the lifetime reduction and the enhancement of single-photon emission from nitrogen-vacancies in nanodiamonds coupled to a TiN/Al 0.6 Sc 0.4 N superlattice. Our results pave the way towards future CMOS-compatible integrated quantum sources.

Cited by 6 publications

References 4 publications

Hyperbolic metamaterial resonator–antenna scheme for large, broadband emission enhancement and single-photon collection

Hyperbolic metamaterial resonator–antenna scheme for large, broadband emission enhancement and single-photon collection

Electron spin contrast of Purcell-enhanced nitrogen-vacancy ensembles in nanodiamonds

Artificial Surfaces and Media for Electromagnetic Absorption and Interference Shielding

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