Open Access70 dB long-pass filter on a nanophotonic chip
Author(s) -
Xu Guo,
ChangLing Zou,
Hong X. Tang
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.021167
Subject(s) - photonics , nanophotonics , optics , optoelectronics , photon , spontaneous parametric down conversion , physics , chip , detector , photonic integrated circuit , quantum imaging , quantum , quantum information , telecommunications , quantum network , computer science , quantum entanglement , quantum mechanics
Integrated quantum photonic chips are promising for scalable, photonic based quantum information processing. Although on-chip quantum photon sources and single photon detectors have been demostrated separately, the full integration of these components on single chip is hindered by the background photons from the strong classical pump light. Here we design and fabricate an on-chip long-pass filter which can provide 70 dB attenuation for visible light near 775 nm with less than 3 dB insertion loss for light in the telecom C-band near 1550 nm. The adiabatic design makes this device broadband and robust against fabrication errors as well as working conditions. Combined with the previously demonstrated non-classical on-chip source based on spontaneous parametric down conversion on the same material system, this platform could enable 100 dB suppression of pump light and holds promise in realizing fully integrated quantum photonic chips where the sources, filters and detectors are monolithically integrated.