Works (18)

Updated: July 5th, 2023 15:45

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 n, M. Hoffmann n, R. Kirste*, M. Bobea n, J. Tweedie*, F. Kaess n, M. Gerhold, R. Collazo n, Z. Sitar n

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID
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 n, M. Hoffmann n, F. Kaess n, Z. Bryan n, I. Bryan n, M. Bobea n, A. Klump n, J. Tweedie* ...

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID
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 n, M. Hoffmann n, R. Collazo n, A. Courville*, R. Di Felice* ...

TL;DR: The authors use transmission electron microscopy and density-functional theory to see how exchange of aluminum, oxygen, and nitrogen within a sapphire substrate mediates the polarity of an epitaxial film of group-III nitride. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2016 article

Strain engineered high reflectivity DBRs in the deep UV

GALLIUM NITRIDE MATERIALS AND DEVICES XI, Vol. 9748.

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

author keywords: Distributed Bragg Reflector (DBR); strain relaxation; MOCVD; AlGaN; Nitride
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID
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 n, M. Hoffmann n, I. Bryan n, R. Collazo n & A. Ivanisevic n

MeSH headings : Adsorption; Biocompatible Materials / chemistry; Blood Proteins / chemistry; Cell Adhesion / drug effects; Fibrinogen / chemistry; Gallium / chemistry; Humans; Immunoglobulin G / chemistry; Metal Nanoparticles / chemistry; Microscopy, Atomic Force; Molecular Conformation; Nanotechnology / methods; Protein Binding; Reproducibility of Results; Serum Albumin / chemistry; Surface Properties
TL;DR: Interactions between common serum proteins - serum albumin, fibrinogen, and immunoglobulin G - and a nanotextured gallium nitride surface are explored and an assessment of the role of surface texture in dictating protein-surface interactions is provided. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 6, 2018

2015 article

Growth and characterization of AlxGa1-xN lateral polarity structures

Hoffmann, M. P., Kirste, R., Mita, S., Guo, W., Tweedie, J., Bobea, M., … Sitar, Z. (2015, May). PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, Vol. 212, pp. 1039–1042.

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

author keywords: AlGaN; growth; lateral polarity structures; optical phase matching
Sources: Web Of Science, ORCID
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 n, R. Kirste n, M. Bobea n, S. Mita*, M. Gerhold, R. Collazo n, Z. Sitar n, M. Zgonik*

Sources: Web Of Science, ORCID
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 n, I. Bryan n, B. Gaddy n, P. Reddy n, L. Hussey n, M. Bobea n, W. Guo n, M. Hoffmann n ...

Sources: Web Of Science, ORCID
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).

By: C. Shelton n, E. Sachet n, E. Paisley n, M. Hoffmann n, J. Rajan n, R. Collazo n, Z. Sitar n, J. Maria n

UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 article

Properties of AlN based lateral polarity structures

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 11, NO 2, Vol. 11, pp. 261–264.

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

author keywords: lateral polarity structures; quasi-phase matching; N-polar; columnar growth
Sources: Web Of Science, ORCID
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), 103504.

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

Sources: Web Of Science, ORCID, Crossref
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 n, M. Hoffmann n, J. Tweedie n, R. Kirste n, G. Callsen*, I. Bryan n, A. Rice n, M. Bobea n ...

author keywords: Mg; GaN; UV excitation; Photoluminescence; Metal-organic chemical vapordeposition (MOCVD)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2013 journal article

Ge doped GaN with controllable high carrier concentration for plasmonic applications

Applied Physics Letters, 103(24), 242107.

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

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: NC State University Libraries, Crossref, ORCID
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 n, J. Xie*, B. Gaddy n, Z. Bryan n, R. Kirste n, M. Hoffmann n, R. Dalmau*, B. Moody* ...

Sources: Web Of Science, ORCID
Added: August 6, 2018

2012 journal article

Optical signature of Mg-doped GaN: Transfer processes

PHYSICAL REVIEW B, 86(7).

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

Sources: Web Of Science, ORCID
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. Quantum sensing and nanophotonic devices x, 8631.

By: M. Hoffmann, M. Gerhold, R. Kirste, A. Rice, C. Akouala, J. Xie, S. Mita, R. Collazo, Z. Sitar

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. Gallium nitride materials and devices ix, 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

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