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Creators/Authors contains: "Ahn, Geun Ho"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Science)
    Although electro-optic (EO) nonlinearities are essential for many quantum and classical photonics applications, a major challenge is inefficient modulation in cryogenic environments. Guided by the connection between phase transitions and nonlinearity, we identify the quantum paraelectric perovskite SrTiO3as a strong cryogenic EO [>500 picometers per volt (pm/V)] and piezo-electric material (>90 picocoulombs per newton) atT= 5 K, at frequencies to at least 1 megahertz. Furthermore, by tuning SrTiO3toward quantum criticality, we more than double the EO and piezo-electric effects, demonstrating a linear Pockels coefficient above 1000 pm/V. Our results probe the link between quantum phase transitions, dielectric susceptibility, and nonlinearity, unlocking opportunities in cryogenic optical and mechanical systems and providing a framework for discovering new nonlinear materials. 
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    Free, publicly-accessible full text available October 23, 2026
  2. ; ; ; ; ; ; (, ACS Photonics)
    Free, publicly-accessible full text available February 19, 2026
  3. ; ; ; ; ; ; ; ; ; ; et al (, Nature Photonics)
    Full Text Available 
  4. ; ; ; ; ; ; ; ; ; ; et al (, Nature Photonics)
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