Works (18)

2016 | journal article

High reflectivity III-nitride UV-C distributed Bragg reflectors for vertical cavity emitting lasers

Journal of Applied Physics, 120(13).

By: A. Franke, M. Hoffmann, R. Kirste, M. Bobea, J. Tweedie, F. Kaess, M. Gerhold, R. Collazo, Z. Sitar

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Point defect reduction in wide bandgap semiconductors by defect quasi Fermi level control

Journal of Applied Physics, 120(18).

By: P. Reddy, M. Hoffmann, F. Kaess, Z. Bryan, I. Bryan, M. Bobea, A. Klump, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2016 | journal article

Polarity control in group-III nitrides beyond pragmatism

Physical Review Applied, 5(5).

By: S. Mohn, N. Stolyarchuk, T. Markurt, R. Kirste, M. Hoffmann, R. Collazo, A. Courville, R. Di Felice ...

Source: NC State University Libraries
Added: August 6, 2018

2016 | conference paper

Strain engineered high reflectivity DBRs in the deep UV

In Gallium nitride materials and devices xi (Vol. 9748).

By: A. Franke, P. Hoffmann, L. Hernandez-Balderrama, F. Kaess, I. Bryan, S. Washiyama, M. Bobea, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Adsorption and adhesion of common serum proteins to nanotextured gallium nitride

Nanoscale, 7(6), 2360–2365.

By: L. Bain, M. Hoffmann, I. Bryan, R. Collazo & A. Ivanisevic

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Growth and characterization of AlxGa1-xN lateral polarity structures

Physica Status Solidi. A, Applications and Materials Science, 212(5), 1039–1042.

By: M. Hoffmann, R. Kirste, S. Mita, W. Guo, J. Tweedie, M. Bobea, I. Bryan, Z. Bryan ...

Source: NC State University Libraries
Added: August 6, 2018

2015 | journal article

Optical characterization of Al- and N-polar AlN waveguides for integrated optics

Applied Physics Express, 8(4).

By: M. Rigler, J. Buh, M. Hoffmann, R. Kirste, M. Bobea, S. Mita, M. Gerhold, R. Collazo, Z. Sitar, M. Zgonik

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Fermi level control of compensating point defects during metalorganic chemical vapor deposition growth of Si-doped AlGaN

Applied Physics Letters, 105(22).

By: Z. Bryan, I. Bryan, B. Gaddy, P. Reddy, L. Hussey, M. Bobea, W. Guo, M. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2014 | journal article

Polarity characterization by anomalous x-ray dispersion of ZnO films and GaN lateral polar structures

Journal of Applied Physics, 115(4).

Source: NC State University Libraries
Added: August 6, 2018

2014 | conference paper

Properties of AlN based lateral polarity structures

In Physica status solidi c: current topics in solid state physics, vol 11, no 2 (Vol. 11, pp. 261–264).

By: R. Kirste, S. Mita, M. Hoffmann, L. Hussey, W. Guo, I. Bryan, Z. Bryan, J. Tweedie ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Compensation effects in GaN: Mg probed by Raman spectroscopy and photoluminescence measurements

Journal of Applied Physics, 113(10).

By: R. Kirste, M. Hoffmann, J. Tweedie, Z. Bryan, G. Callsen, T. Kure, C. Nenstiel, M. Wagner ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Fermi level control of point defects during growth of Mg-doped GaN

Journal of Electronic Materials, 42(5), 815–819.

By: Z. Bryan, M. Hoffmann, J. Tweedie, R. Kirste, G. Callsen, I. Bryan, A. Rice, M. Bobea ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Ge doped GaN with controllable high carrier concentration for plasmonic applications

Applied Physics Letters, 103(24).

By: R. Kirste, M. Hoffmann, E. Sachet, M. Bobea, Z. Bryan, I. Bryan, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

2013 | journal article

Polarity determination of polar and semipolar (11(2)over-bar2) InN and GaN layers by valence band photoemission spectroscopy

Journal of Applied Physics, 114(17).

By: D. Skuridina, D. Dinh, B. Lacroix, P. Ruterana, M. Hoffmann, Z. Sitar, M. Pristovsek, M. Kneissl, P. Vogt

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

On the origin of the 265 nm absorption band in AlN bulk crystals

Applied Physics Letters, 100(19).

By: R. Collazo, J. Xie, B. Gaddy, Z. Bryan, R. Kirste, M. Hoffmann, R. Dalmau, B. Moody ...

Source: NC State University Libraries
Added: August 6, 2018

2012 | journal article

Optical signature of Mg-doped GaN: Transfer processes

Physical Review. B, Condensed Matter and Materials Physics, 86(7).

By: G. Callsen, M. Wagner, T. Kure, J. Reparaz, M. Bugler, J. Brunnmeier, C. Nenstiel, A. Hoffmann ...

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

Fabrication and characterization of lateral polar GaN structures for second harmonic generation

Hoffmann, M. P., Gerhold, M., Kirste, R., Rice, A., Akouala, C. R., Xie, J. Q. Q., … Sitar, Z. In Quantum sensing and nanophotonic devices x (Vol. 8631).

Source: NC State University Libraries
Added: August 6, 2018

| conference paper

Point defect management in GaN by Fermi-level control during growth

Hoffmann, M. P., Tweedie, J., Kirste, R., Bryan, Z., Bryan, I., Gerhold, M., … Collazo, R. In Gallium nitride materials and devices ix (Vol. 8986).

By: M. Hoffmann, J. Tweedie, R. Kirste, Z. Bryan, I. Bryan, M. Gerhold, Z. Sitar, R. Collazo

Source: NC State University Libraries
Added: August 6, 2018