DocumentCode :
682976
Title :
Absorption enhancement in ultra-thin film Si slabs using novel photonic crystal textures
Author :
Callahan, Dennis M. ; Whitesell, Kelsey A. ; Atwater, Harry A.
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
fYear :
2013
fDate :
16-21 June 2013
Firstpage :
1842
Lastpage :
1844
Abstract :
We perform rigorous coupled wave analysis (RCWA) and finite-difference time-domain (FDTD) calculations on thin (<; 200 nm) slabs of Si with various wavelength scale texturing. Traditional photonic crystal patterning is investigated and compared to a flat Si slab with a double layer anti-reflection coating. These traditional photonic crystal lattices are then modified with superlattice which further improve the absorption. We also investigate the angular spectra of select lattices and show how resonant absorption peaks shift with incident angle. It is concluded that alternate photonic crystal texturing can lead to significantly enhanced absorption over planar slabs with optimized anti-reflection coatings.
Keywords :
absorption; elemental semiconductors; finite difference time-domain analysis; lattice theory; photonic crystals; semiconductor thin films; silicon; slabs; FDTD; RCWA; Si; absorption enhancement; finite-difference time-domain; optimized antireflection coatings; photonic crystal patterning; photonic crystal textures; planar slabs; rigorous coupled wave analysis; wavelength scale texturing; Absorption; Lattices; Optical resonators; Photonic crystals; Silicon; Slabs; Superlattices; LDOS; light trapping; nanophotonics; photonic crystal; silicon;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th
Conference_Location :
Tampa, FL
Type :
conf
DOI :
10.1109/PVSC.2013.6744500
Filename :
6744500
Link To Document :
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