We present recent studies in which engineering the interaction between light and nanoscale materials has been pursued for applications in image sensors and in spectroscopy. In the first, we present recent work by the author and colleagues on the use of silicon [1-5] and germanium  nanowires for multispectral imaging. We show that their ability to support waveguide modes leads to spectrally-selective absorption properties . We show that this in turn enables the nanowires to be used as filters or photodetectors for color and multispectral imaging [2-6].
 K. Seo et al, Nano Letters 11, 1851 (2011)
 H. Park and K. B Crozier, Scientific Reports 3, 2460 (2012)
 H. Park, Y. Dan, K. Seo, Y. J. Yu, P. K. Duane, M. Wober, K. B. Crozier, Nano Letters 14, 1804 (2014)
 H. Park and K. B Crozier, Optics Express 23, 7209 (2015)
 H. Park and K. B Crozier, ACS Photonics 2, 544 (2015)
 A. Solanki and K. B. Crozier, Appl. Phys. Lett. 105, 191115 (2014)
Kenneth B. Crozier, "Recent progress in semiconductor nanowire photodetectors for color and multispectral imaging (Conference Presentation)," Proc. SPIE 10113, High Contrast Metastructures VI, 1011307 (Presented at SPIE OPTO: February 01, 2017; Published: 28 April 2017); https://doi.org/10.1117/12.2256012.5395679962001.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon