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   https://doi.org/10.1002/adom.202401101  

   DeVault, Clayton_T; Deckoff‐Jones, Skylar; Liu, Yuzi; Hammock, Ian_N; Sullivan, Sean_E; Dibos, Alan; Sorce, Peter; Orcutt, Jason; Awschalom, David_D; Heremans, F_Joseph; et al (August 2024, Advanced Optical Materials)

   Abstract Silicon carbide (SiC)'s nonlinear optical properties and applications to quantum information have recently brought attention to its potential as an integrated photonics platform. However, despite its many excellent material properties, such as large thermal conductivity, wide transparency window, and strong optical nonlinearities, it is generally a difficult material for microfabrication. Here, it is shown that directly bonded silicon‐on‐silicon carbide can be a high‐performing hybrid photonics platform that does not require the need to form SiC membranes or directly pattern in SiC. The optimized bonding method yields defect‐free, uniform films with minimal oxide at the silicon–silicon–carbide interface. Ring resonators are patterned into the silicon layer with standard, complimentary metal–oxide–semiconductor (CMOS) compatible (Si) fabrication and measure room‐temperature, near‐infrared quality factors exceeding 10⁵. The corresponding propagation loss is 5.7 dB cm⁻¹. The process offers a wafer‐scalable pathway to the integration of SiC photonics into CMOS devices. 

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2. 3D-printed electrically conductive silicon carbide

   https://doi.org/10.1016/j.addma.2022.103109  

   Guo, Zipeng; An, Lu; Khuje, Saurabh; Chivate, Aditya; Li, Jiao; Wu, Yiquan; Hu, Yong; Armstrong, Jason; Ren, Shenqiang; Zhou, Chi (November 2022, Additive Manufacturing)
3. Developing silicon carbide for quantum spintronics

   https://doi.org/10.1063/5.0004454  

   Son, Nguyen T.; Anderson, Christopher P.; Bourassa, Alexandre; Miao, Kevin C.; Babin, Charles; Widmann, Matthias; Niethammer, Matthias; Ul Hassan, Jawad; Morioka, Naoya; Ivanov, Ivan G.; et al (May 2020, Applied Physics Letters)
4. Silicon Carbide Photonics Bridging Quantum Technology

   https://doi.org/10.1021/acsphotonics.1c01775  

   Castelletto, Stefania; Peruzzo, Alberto; Bonato, Cristian; Johnson, Brett C.; Radulaski, Marina; Ou, Haiyan; Kaiser, Florian; Wrachtrup, Joerg (May 2022, ACS Photonics)
5. Spin-acoustic control of silicon vacancies in 4H silicon carbide

   https://doi.org/10.1038/s41928-023-01029-4  

   Dietz, Jonathan_R; Jiang, Boyang; Day, Aaron_M; Bhave, Sunil_A; Hu, Evelyn_L (September 2023, Nature Electronics)

   Abstract Bulk acoustic resonators can be fabricated on the same substrate as other components and can operate at various frequencies with high quality factors. Mechanical dynamic metrology of these devices is challenging as the surface information available through laser Doppler vibrometry lacks information about the acoustic energy stored in the bulk of the resonator. Here we report the spin-acoustic control of naturally occurring negatively charged silicon monovacancies in a lateral overtone bulk acoustic resonator that is based on 4H silicon carbide. We show that acoustic driving can be used at room temperature to induce coherent population oscillations. Spin-acoustic resonance is shown to be useful as a frequency-tunable probe of bulk acoustic wave resonances, highlighting the dynamical strain distribution inside a bulk acoustic wave resonator at ambient operating conditions. Our approach could be applied to the characterization of other high-quality-factor microelectromechanical systems and has the potential to be used in mechanically addressable quantum memory. 

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