期刊
OPTICS LETTERS
卷 42, 期 11, 页码 2094-2097出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.42.002094
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资金
- Konica Minolta Imaging Science Foundation Encouragement Award
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- New Energy and Industrial Technology Development Organization (NEDO) Integrated Photonics-Electronics Convergence System Technology (PECST) project
- Burroughs Wellcome Foundation
- MEXT
- Grants-in-Aid for Scientific Research [26220605] Funding Source: KAKEN
We present a focusing subwavelength grating (SWG) for efficient coupling of mid-infrared (mid-IR) light into suspended membrane Ge photonic integrated circuits (PICs) that enable mid-IR applications in the entire fingerprint region. By virtue of their wide spectral transparency window and air-cladding device configuration, the suspended membrane Ge PICs are expected to be effective for mid-IR applications over the spectral region covering from 2 to 15 mu m. Specifically, we demonstrate the maximum coupling efficiency of -11 dB with a 1-dB bandwidth of similar to 58 nm at the SWG's center wavelength of 2.37 mu m. Our focusing SWG is expected to advance the development of on-chip long-wavelength mid-IR applications such as biochemical sensing, thermal imaging, and nonlinear optics in the fingerprint region. (C) 2017 Optical Society of America
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