High-order waveguide modes in ZnO nanowires.
We use tapered silica fibers to inject laser light into ZnO nanowires with diameters around 250 nm to study their waveguiding properties. We find that high-order waveguide modes are frequently excited and carry significant intensity at the wire surface. Numerical simulations reproduce the experimental observations and indicate a coupling efficiency between silica and ZnO nanowires of 50%. Experimentally, we find an emission angle from the ZnO nanowires of about 90 degrees , which is in agreement with the simulations.
Voss
Tobias
T
Department of Physics and School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
Svacha
Geoffry T
GT
Mazur
Eric
E
Müller
Sven
S
Ronning
Carsten
C
Konjhodzic
Denan
D
Marlow
Frank
F
D007834:Lasers; D053770:Nanowires / Q000737:chemistry*; D012666:Semiconductors; D012822:Silicon Dioxide / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry*
D012822:Silicon Dioxide; D015034:Zinc Oxide