Abstract

Polarization-resolved reflections from ordered and bunched silicon nanowire arrays are measured and compared. It is shown that the reflections reduce considerably in bunched nanowires for the p-polarized input while not changing considerably for the s-polarized input between the ordered and bunched nanowires. The reflection is less than 9% for the whole 230–1000 nm wavelength excitation range for the bunched nanowires in the p-polarized input. Frequency-selective reflection features are observed in the ordered nanowires. Results are explained using effective index approximation and finite difference time domain simulations.

© 2012 Optical Society of America

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  1. L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
    [CrossRef]
  2. E. Garnett and P. Yang, “Light trapping in silicon nanowire solar cells,” Nano Lett. 10, 1082–1087 (2010).
    [CrossRef]
  3. M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
    [CrossRef]
  4. J.-Y. Jung, Z. Guo, S. W. Jee, H. D. Um, K. T. Park, and J. H. Lee, “A strong antireflective solar cell prepared by tapering silicon nanowires,” Opt. Express 18, A286–A292, (2010).
    [CrossRef]
  5. L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
    [CrossRef]
  6. K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
    [CrossRef]
  7. L. Hu and G. Chen, “Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications,” Nano Lett. 7, 3249–3252 (2007).
    [CrossRef]
  8. H. Bao and X. Ruan, “Optical absorption enhancement in disordered vertical silicon nanowire arrays for photovoltaic applications,” Opt. Lett. 35, 3378–3380 (2010).
    [CrossRef]
  9. W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
    [CrossRef]
  10. S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
    [CrossRef]
  11. M. Khorasaninejad, N. Abedzadeh, J. Sun, J. N. Hilfiker, and S. S. Saini, “Polarization resolved reflection from ordered vertical silicon nanowire arrays,” Opt. Lett. 37, 2961–2963 (2012).
    [CrossRef]
  12. M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
    [CrossRef]
  13. K. Huang, S. Yang, and L. Tong, “Modeling of evanescent coupling between two parallel optical nanowires,” Appl. Opt. 46, 1429–1434 (2007).
    [CrossRef]
  14. S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
    [CrossRef]
  15. D. E. Aspnes, “Optical properties of thin films,” Thin Solid Films 89, 249–262 (1982).
    [CrossRef]

2012 (2)

M. Khorasaninejad, N. Abedzadeh, J. Sun, J. N. Hilfiker, and S. S. Saini, “Polarization resolved reflection from ordered vertical silicon nanowire arrays,” Opt. Lett. 37, 2961–2963 (2012).
[CrossRef]

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

2011 (2)

W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
[CrossRef]

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

2010 (6)

H. Bao and X. Ruan, “Optical absorption enhancement in disordered vertical silicon nanowire arrays for photovoltaic applications,” Opt. Lett. 35, 3378–3380 (2010).
[CrossRef]

E. Garnett and P. Yang, “Light trapping in silicon nanowire solar cells,” Nano Lett. 10, 1082–1087 (2010).
[CrossRef]

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

J.-Y. Jung, Z. Guo, S. W. Jee, H. D. Um, K. T. Park, and J. H. Lee, “A strong antireflective solar cell prepared by tapering silicon nanowires,” Opt. Express 18, A286–A292, (2010).
[CrossRef]

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

2008 (1)

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

2007 (3)

K. Huang, S. Yang, and L. Tong, “Modeling of evanescent coupling between two parallel optical nanowires,” Appl. Opt. 46, 1429–1434 (2007).
[CrossRef]

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

L. Hu and G. Chen, “Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications,” Nano Lett. 7, 3249–3252 (2007).
[CrossRef]

1982 (1)

D. E. Aspnes, “Optical properties of thin films,” Thin Solid Films 89, 249–262 (1982).
[CrossRef]

Abedzadeh, N.

M. Khorasaninejad, N. Abedzadeh, J. Sun, J. N. Hilfiker, and S. S. Saini, “Polarization resolved reflection from ordered vertical silicon nanowire arrays,” Opt. Lett. 37, 2961–2963 (2012).
[CrossRef]

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

Anantram, M. P.

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

Aspnes, D. E.

D. E. Aspnes, “Optical properties of thin films,” Thin Solid Films 89, 249–262 (1982).
[CrossRef]

Atwater, H. A.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Balch, J.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Bao, H.

Barnard, E. S.

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

Boettcher, S. W.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Briggs, R. M.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Brongersma, M. L.

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

Brown, A. M.

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

Cao, L.

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

Chang, Y.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Chen, G.

L. Hu and G. Chen, “Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications,” Nano Lett. 7, 3249–3252 (2007).
[CrossRef]

Crozier, K. B.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Dan, Y.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Ellenbogen, T.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Fan, P.

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

Fronheiser, J.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Garnett, E.

E. Garnett and P. Yang, “Light trapping in silicon nanowire solar cells,” Nano Lett. 10, 1082–1087 (2010).
[CrossRef]

Guo, Z.

Hilfiker, J.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Hilfiker, J. N.

Hsu, S.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Hu, L.

L. Hu and G. Chen, “Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications,” Nano Lett. 7, 3249–3252 (2007).
[CrossRef]

Huang, K.

Husain, M.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Jawanda, A. S.

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

Jee, S. W.

Jung, J.-Y.

Kar, M.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Kelzenberg, M. D.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Khorasaninejad, M.

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

M. Khorasaninejad, N. Abedzadeh, J. Sun, J. N. Hilfiker, and S. S. Saini, “Polarization resolved reflection from ordered vertical silicon nanowire arrays,” Opt. Lett. 37, 2961–2963 (2012).
[CrossRef]

Kim, T. J.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Kim, Y. D.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Korevaar, B. A.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Kumar, D.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Kumar, V.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Lee, J. H.

Lewis, N. S.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Lin, C.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Lin, G.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Liu, E.

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

O, N.

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

Oh, J. I.

W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
[CrossRef]

Park, K. T.

Petykiewicz, J. A.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Putnam, M. C.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Rand, J.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Ruan, X.

Saini, S. S.

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

M. Khorasaninejad, N. Abedzadeh, J. Sun, J. N. Hilfiker, and S. S. Saini, “Polarization resolved reflection from ordered vertical silicon nanowire arrays,” Opt. Lett. 37, 2961–2963 (2012).
[CrossRef]

Schonbrun, E.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Seo, K.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Shen, W. Z.

W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
[CrossRef]

Singh, P. K.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Spurgeon, J. M.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Srivastava, S. K.

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Steinvurzal, P.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Sulima, O.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Sun, J.

Tong, L.

Tsakalakos, L.

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

Turner-Evans, D. B.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Um, H. D.

Warren, E. L.

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Wober, M.

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

Xie, W. Q.

W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
[CrossRef]

Yang, P.

E. Garnett and P. Yang, “Light trapping in silicon nanowire solar cells,” Nano Lett. 10, 1082–1087 (2010).
[CrossRef]

Yang, S.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

L. Tsakalakos, J. Balch, J. Fronheiser, B. A. Korevaar, O. Sulima, and J. Rand, “Silicon nanowire solar cells,” Appl. Phys. Lett. 91, 233117 (2007).
[CrossRef]

J. Appl. Phys. (1)

M. Khorasaninejad, N. Abedzadeh, A. S. Jawanda, N. O, M. P. Anantram, and S. S. Saini, “Bunching characteristics of silicon nanowire arrays,” J. Appl. Phys. 111, 044328 (2012).
[CrossRef]

Nano Lett. (4)

E. Garnett and P. Yang, “Light trapping in silicon nanowire solar cells,” Nano Lett. 10, 1082–1087 (2010).
[CrossRef]

L. Cao, P. Fan, E. S. Barnard, A. M. Brown, and M. L. Brongersma, “Tuning the color of silicon nanostructures,” Nano Lett. 10, 2649–2654 (2010).
[CrossRef]

K. Seo, M. Wober, P. Steinvurzal, E. Schonbrun, Y. Dan, T. Ellenbogen, and K. B. Crozier, “Multicolored vertical silicon nanowires,” Nano Lett. 11, 1851–1856 (2011).
[CrossRef]

L. Hu and G. Chen, “Analysis of optical absorption in silicon nanowire arrays for photovoltaic applications,” Nano Lett. 7, 3249–3252 (2007).
[CrossRef]

Nanotechnology (1)

W. Q. Xie, J. I. Oh, and W. Z. Shen, “Realization of effective light trapping and omnidirectional antireflection in smooth surface silicon nanowire arrays,” Nanotechnology 22, 1–9 (2011).
[CrossRef]

Nat. Mater. (1)

M. D. Kelzenberg, S. W. Boettcher, J. A. Petykiewicz, D. B. Turner-Evans, M. C. Putnam, E. L. Warren, J. M. Spurgeon, R. M. Briggs, N. S. Lewis, and H. A. Atwater, “Enhanced absorption and carrier collection in Si wire arrays for photovoltaic applications,” Nat. Mater. 9, 239–244 (2010).
[CrossRef]

Opt. Express (1)

Opt. Lett. (2)

Phys. Status Solidi A (1)

S. Hsu, E. Liu, Y. Chang, J. Hilfiker, Y. D. Kim, T. J. Kim, C. Lin, and G. Lin, “Characterization of Si nanorods by spectroscopic ellipsometry with efficient theoretical modeling,” Phys. Status Solidi A 205, 876–879 (2008).
[CrossRef]

Solar Energy Mater. Solar Cells (1)

S. K. Srivastava, D. Kumar, P. K. Singh, M. Kar, V. Kumar, and M. Husain, “Excellent anti reflection properties of vertical silicon nanowire arrays,” Solar Energy Mater. Solar Cells 94, 1506–1511 (2010).
[CrossRef]

Thin Solid Films (1)

D. E. Aspnes, “Optical properties of thin films,” Thin Solid Films 89, 249–262 (1982).
[CrossRef]

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Figures (8)

Fig. 1.
Fig. 1.

SEM images for SiNWs with diameter of (a) 65 nm, (b) 80 nm, (c) 90 nm, and (d) 105 nm. All scale bars are 1 μm.

Fig. 2.
Fig. 2.

Schematic of the reflection measurements.

Fig. 3.
Fig. 3.

Reflections for p-polarized input for (a) bunched nanowires and (b) vertical nanowires.

Fig. 4.
Fig. 4.

Reflections for s-polarized input for (a) bunched nanowires and (b) vertical nanowires.

Fig. 5.
Fig. 5.

Simulated reflections for p- (left) and s-polarized (right) reflections from ordered nanowires of various diameters, with measured reflections from 90 nm diameter nanowires. Incident angle of light is 65°.

Fig. 6.
Fig. 6.

Anisotropic (a) effective refractive index and (b) absorption coefficient for SiNW arrays of 105 nm diameter. The values are plotted in log scale for ease of visualization.

Fig. 7.
Fig. 7.

Schematic of FSTD simulations.

Fig. 8.
Fig. 8.

Measured reflections in s-polarization and calculated absorption for semi-infinite long nanowires with FDTD for diameter of (a) 90 nm and (b) 105 nm.

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