Details

Autor(en) / Beteiligte

• Lu, Xiyuan
• Moille, Gregory
• Li, Qing
• Westly, Daron A.
• Singh, Anshuman
• Rao, Ashutosh
• Yu, Su-Peng
• Briles, Travis C.
• Papp, Scott B.
• Srinivasan, Kartik

Titel

Efficient telecom-to-visible spectral translation through ultralow power nonlinear nanophotonics

Ist Teil von

• Nature photonics, 2019-09, Vol.13 (9), p.593-601

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The ability to spectrally translate lightwave signals in a compact, low-power platform is at the heart of the promise of nonlinear nanophotonic technologies. For example, a device to connect the telecommunications band with visible and short near-infrared wavelengths can enable a connection between high-performance chip-integrated lasers based on scalable nanofabrication technology with atomic systems used for time and frequency metrology. Although second-order nonlinear (χ(2)) systems are the natural approach for bridging such large spectral gaps, here we show that third-order nonlinear (χ(3)) systems, despite their typically much weaker nonlinear response, can realize spectral translation with unprecedented performance. By combining resonant enhancement with nanophotonic mode engineering in a silicon nitride microring resonator, we demonstrate efficient spectral translation of a continuous-wave signal from the telecom band (~1,550 nm) to the visible band (~650 nm) through cavity-enhanced four-wave mixing. We achieve such translation over a wide spectral range >250 THz with a translation efficiency of (30.1 ± 2.8)% and using an ultralow pump power of (329 ± 13) μW. The translation efficiency projects to (274 ± 28)% at 1 mW and is more than an order of magnitude larger than what has been achieved in current nanophotonic devices.