Journal article

Harnessing the Interplay between Photonic Resonances and Carrier Extraction for Narrowband Germanium Nanowire Photodetectors Spanning the Visible to Infrared

Amit Solanki, Shiqiang Li, Hyunsung Park, Kenneth B Crozier

ACS Photonics | American Chemical Society | Published : 2018


At visible wavelengths, photodetection in three channels (red, green, and blue) enables color imaging. Yet the spectra of most materials provide richer information than just color, and therefore considerable interest exists for imaging with multiple spectral bands across the visible to infrared. This endeavor requires narrowband photodetection, which is generally achieved by combining broadband photodetectors with filters or spectrometers, but with added bulk and cost. Here we report, for the first time to our knowledge, vertical germanium nanowires as narrowband photodetectors. Our devices exhibit spectral response peaks that are as narrow as 40 nm and can be shifted from visible (∼600 nm) ..

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University of Melbourne Researchers


Awarded by Army Research Laboratory

Awarded by National Science Foundation (NSF)

Awarded by Australian Research Council

Funding Acknowledgements

The research was sponsored in part by the Army Research Laboratory and was accomplished under Cooperative Agreement Number W911NF-13-2-0015. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Laboratory or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. The research was sponsored in part by the National Science Foundation (NSF, Grant No. ECCS-130756). Fabrication work was performed at the Harvard Center for Nanoscale Systems (CNS), which was supported by the NSF. S.L. and K.B.C. acknowledge support from the Australian Research Council (DP150103736 and FT140100577) and from the Victorian Endowment for Science, Knowledge and Innovation (VESKI).