Comparative study of absorption efficiency of inclined and vertical InP nanowires

Aghaeipour, MahtabLund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden (författare)

Funding: NanoLund, the Swedish Research Council (VR), the Swedish Foundation for Strategic Research (SSF), and the Knut and Alice Wallenberg Foundation
Geometrically designed III-V nanowire arrays are promising candidates for optoelectronics due to their possibility to excite nanophotonic resonances in absorption spectra. Strong absorption resonances can be obtained by proper tailoring of nanowire diameter, length and pitch. Such enhancement of the light absorption is, however, accompanied by undesired resonance dips at specific wavelengths. In this work, we theoretically show that tilting of the nanowires mitigates the absorption dips by exciting strong Mie resonances. In particular, we derive a theoretical optimum inclination angle of about 30 degrees at which the inclined nanowires gain 8% in absorption efficiency compared to vertically standing nanowires in a spectral region matching the intensity distribution of the sun. The enhancement is due to engineering the excited modes inside the nanowires regarding the symmetry properties of the nanowire/light system without increasing the absorbing material. We expect our results to be important for nanowire-based photovoltaic applications. © 2017 SPIE.

Pistol, Mats ErikLund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Lund University, Lund, Sweden(Swepub:lu)ftf-mpi (författare)
Pettersson, Håkan,1962-Halmstad University,Lunds universitet,Högskolan i Halmstad,Halmstad Embedded and Intelligent Systems Research (EIS),Lund University, Lund, Sweden,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)ftf-hap (författare)
Fasta tillståndets fysikFysiska institutionen (creator_code:org_t)

Ingår i:Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VIBellingham, WA : SPIE - International Society for Optical Engineering100999781510606401
Ingår i:Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017Bellingham, WA : SPIE - International Society for Optical Engineering100999781510606395

Av författaren/redakt...: Aghaeipour, Maht ...; Pistol, Mats Eri ...; Pettersson, Håka ...

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