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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 8 — Aug. 1, 2013
  • pp: 1039–1048

Silicon micro-structure and ZnO nanowire hierarchical assortments for light management

B. Dev Choudhury, A. Abedin, A. Dev, R. Sanatinia, and S. Anand  »View Author Affiliations


Optical Materials Express, Vol. 3, Issue 8, pp. 1039-1048 (2013)
http://dx.doi.org/10.1364/OME.3.001039


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Abstract

We present fabrication and optical characterization of Si microstructure-ZnO nanowire (NWs) hierarchical structures for light management. Random and periodic hierarchical structures constituting Si micro pillar or micro pyramid arrays with overgrown ZnO NWs have been fabricated. Inexpensive colloidal lithography in combination with dry and wet chemical etching is used to fabricate Si microstructures, and ZnO NWs are grown by hydrothermal synthesis. The periodic Si micro pyramid-ZnO NWs hierarchical structure shows broadband antireflection with average reflectance as low as 2.5% in the 300-1000 nm wavelength range. A tenfold enhancement in Raman intensity is observed in this structure compared to planar Si sample. These hierarchical structures with enriched optical properties and high surface to volume ratio are promising for photovoltaic (PV) and sensor applications.

© 2013 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(040.6040) Detectors : Silicon
(120.5700) Instrumentation, measurement, and metrology : Reflection
(130.6010) Integrated optics : Sensors
(220.4000) Optical design and fabrication : Microstructure fabrication
(290.4210) Scattering : Multiple scattering
(300.6450) Spectroscopy : Spectroscopy, Raman
(310.1210) Thin films : Antireflection coatings
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Nanomaterials

History
Original Manuscript: May 29, 2013
Revised Manuscript: June 26, 2013
Manuscript Accepted: June 26, 2013
Published: July 9, 2013

Citation
B. Dev Choudhury, A. Abedin, A. Dev, R. Sanatinia, and S. Anand, "Silicon micro-structure and ZnO nanowire hierarchical assortments for light management," Opt. Mater. Express 3, 1039-1048 (2013)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-3-8-1039


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