Measuring the Optical Absorption of Single Nanowires
- 1. Department of Physics, University of Basel, 4056 Basel, Switzerland
- 2. Department of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, Netherlands
- 3. Institute of Materials, Faculty of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- 4. Central European IInstitute of Solid-State Electronics and Center for Micro- and Nanostructures, TU Wien, 1040 Vienna, Austrianstitute of Technology, Brno University of Technology, 612 00 Brno, Czech Republic and
- 5. Institute of Solid-State Electronics and Center for Micro- and Nanostructures, TU Wien, 1040 Vienna, Austria
- 6. Institute of Materials, Faculty of Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland and Institute of Physics, Faculty of Basic Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
Description
In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.
Notes
Files
[Update] WZ GaAs NW_23_07_2019.pdf
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Additional details
Related works
- Is supplement to
- Journal article: 10.1103/PhysRevApplied.14.024045 (DOI)