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Quantum Sensing and Nano Electronics and Photonics

Nanoassembled quantum photonic devices with nanodiamond-based color centers

Simeon Bogdanov, Oksana Makarova, Ilya A. Rodionov, Alexandra E. Boltasseva, Vladimir M. Shalaev

Published Mar 4, 2022• 0 citations
Publisher

Abstract

Color centers in nanodiamonds are promising candidates to realize high-bandwidth quantum optical devices integrated on mature photonic platforms. However, both the optical properties of these emitters and the geometries of host nanoparticles are highly heterogenous. The interfacing of nanodiamond-based color centers with the on-chip photonic circuitry requires their careful pre-selection and deterministic manipulation with nanoscale precision. We present a suite of recently developed techniques for rapid emitter selection and nanofabrication aimed at realizing deterministically assembled plasmon-enhanced single-photon sources. These techniques include optical nanoparticle metrology, machine learning for quantum optical measurements, probe-assisted nanoantenna assembly and the control of plasmonic cavity volume through photomodification.

DOI
10.1117/12.2609290

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Color centers in nanodiamonds are promising candidates to realize high-bandwidth quantum optical devices integrated on mature photonic platforms. However, both the optical properties of these emitters and the geometries of host nanoparticles are highly heterogenous. The interfacing of nanodiamond-based color centers with the on-chip photonic circuitry requires their careful pre-selection and deterministic manipulation with nanoscale precision. We present a suite of recently developed techniques for rapid emitter selection and nanofabrication aimed at realizing deterministically assembled plasmon-enhanced single-photon sources. These techniques include optical nanoparticle metrology, machine learning for quantum optical measurements, probe-assisted nanoantenna assembly and the control of plasmonic cavity volume through photomodification.
Optically active color centers in nanodiamonds offer unique opportunities for generating and manipulating quantum states of light. These mechanically, chemically, and optically robust emitters can be produced in mass quantities, deterministically manipulated, and integrated with a variety of quantum device geometries and photonic material platforms. Nanodiamonds with deeply sub-wavelength sizes coupled to nanophotonic structures feature a giant enhancement of light-matter interaction, promising high bitrates in quantum photonic systems. We review the recent advances in controlled techniques for synthesizing, selecting, and manipulating nanodiamond-based color centers for their integration with quantum nanophotonic devices.
Optically active color centers in nanodiamonds offer unique opportunities for generating and manipulating quantum states of light. These mechanically, chemically, and optically robust emitters can be produced in mass quantities, deterministically manipulated, and integrated with a variety of quantum device geometries and photonic material platforms. Nanodiamonds with deeply sub-wavelength sizes coupled to nanophotonic structures feature a giant enhancement of light-matter interaction, promising high bitrates in quantum photonic systems. We review the recent advances in controlled techniques for synthesizing, selecting, and manipulating nanodiamond-based color centers for their integration with quantum nanophotonic devices.
Diamond has emerged as a leading host material for solid-state quantum emitters, quantum memories, and quantum sensors. However, the challenges in fabricating photonic devices in diamond have limited its potential for use in quantum technologies. While various hybrid integration approaches have been developed for coupling diamond color centers with photonic devices defined in a heterogeneous material, these methods suffer from either large insertion loss at the material interface or evanescent light-matter coupling. Here, we present a new technique that enables the deterministic assembly of diamond color centers in a silicon nitride photonic circuit. Using this technique, we observe Purcell enhancement of silicon vacancy centers coupled to a silicon nitride ring resonator. Our hybrid integration approach has the potential for achieving the maximum possible light-matter interaction strength while maintaining low insertion loss and paves the way toward scalable manufacturing of large-scale quantum photonic circuits integrated with high-quality quantum emitters and spins.
Luminescence properties of single color centers were studied in nanodiamonds of different origin. It was found that single photon emitters could be realized even in molecularsized diamond (less than 2 nm) capable of housing stable luminescent center “silicon-vacancy.” First results on incorporation of single-photon emitters based on luminescent nanodiamonds in plasmonic nanoantennas to enhance the photon count rate and directionality, diminish the fluorescence decay time, and provide polarization selectivity are presented.
Light-matter interaction is the foundation for numerous important quantum optical phenomena, which may be harnessed to build practical devices with higher efficiency and unprecedented functionality. Nanoscale engineering is seen as a fruitful avenue to significantly strengthen light-matter interaction and also make quantum optical systems ultra-compact, scalable, and energy efficient. This research focuses on color centers in diamond that share quantum properties with single atoms. These systems promise a path for the realization of practical quantum devices such as nanoscale sensors, single-photon sources, and quantum memories. In particular, we explored an intriguing methodology of utilizing nanophotonic structures, such as hyperbolic metamaterials, nanoantennae, and plasmonic waveguides, to improve the color centers performance. We observed enhancement in the color center’s spontaneous emission rate, emission directionality, and cooperativity over a broad optical frequency range. Additionally, we studied the effect of plasmonic environments on the spin-readout sensitivity of color centers. The use of CMOS-compatible epitaxially grown plasmonic materials in the design of these nanophotonic structures promises a new level of performance for a variety of integrated room-temperature quantum devices based on diamond color centers.