Abstract
We studied the photoluminescence of tensile strained germanium nanostructures. Sub-micron gratings and pillars were fabricated before being coated with strained silicon nitride films. Using different deposition conditions and different sizes of structures the stress in the nanostructures can be controlled. The measured optical properties of the samples show that the direct band-gap is shifted drastically towards higher wavelengths over 1.9 μm. This local control of the stress in germanium nanostructures opens the route for both emitters and photodetectors above 1.6 μm wavelength which are not easily available and also potentially towards a germanium laser.
© 2012 Optical Society of America
PDF ArticleMore Like This
Shihao Huang, Weifang Lu, Cheng Li, Wei huang, Hongkai Lai, and Songyan Chen
AF3B.4 Asia Communications and Photonics Conference (ACP) 2012
Philippe Velha, Kevin Gallacher, Derek Dumas, Douglas J. Paul, Maksym Myronov, and David R. Leadley
CW1L.7 CLEO: Science and Innovations (CLEO:S&I) 2012
Donguk Nam, Arunanshu M. Roy, Kevin C. Y. Huang, Mark L. Brongersma, and Krishna C. Saraswat
JTuI85 CLEO: Applications and Technology (CLEO:A&T) 2011