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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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Hybrid acousto-optic/electro-optic leaky-mode deflectors
We introduce a solution for enabling vertical parallax in solid-state leaky mode devices by integrating an electro-optic (EO) phased array. We present a simple proof of concept for an acousto-optic (AO)/EO modulator deflecting in two axes and describe how this could be refined and adapted for transparent large-format and near-eye holographic displays.
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- Award ID(s):
- 1846477
- PAR ID:
- 10369547
- Publisher / Repository:
- Optical Society of America
- Date Published:
- Journal Name:
- Journal of the Optical Society of America A
- Volume:
- 39
- Issue:
- 4
- ISSN:
- 1084-7529; JOAOD6
- Format(s):
- Medium: X Size: Article No. 766
- Size(s):
- Article No. 766
- Sponsoring Org:
- National Science Foundation
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