Progress towards interaction-free all-optical devices

Dmitry V. Strekalov, Abijith S. Kowligy, Yu Ping Huang, Prem Kumar

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We present an all-optical control device in which coupling a weak control optical field into a high-Q lithium niobate whispering-gallery-mode microcavity decouples it from a signal field due to nonlinear optical interactions. This results in switching and modulation of the signal with low-power control pulses. In the quantum limit, the underlying nonlinear-optical process corresponds to the quantum Zeno blockade. Its "interaction-free" nature effectively alleviates loss and decoherence for the signal waves. This work therefore presents experimental progress towards acquiring large phase shifts with few photons or even at the single-photon level.

Original languageEnglish (US)
Article number063820
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number6
StatePublished - Jun 23 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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