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M. R. Wagner
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Journal Articles

Impact of nanoscale fluctuations and cap-layer thickness in buried InGaN single quantum wells probed by tip-enhanced Raman scattering

Editor’s Pick
M. Ries, E. Poliani, F. Nippert, D. Seidlitz, L. T. H. Greif, I. Koslow, J. Bläsing, M. Auf der Maur, A. Hoffmann, N. Esser, M. R. Wagner
Journal: Journal of Applied Physics
J. Appl. Phys. 133, 094303 (2023)
https://doi.org/10.1063/5.0129896
Published: March 2023
View article titled, Impact of nanoscale fluctuations and cap-layer thickness in buried InGaN single quantum wells probed by tip-enhanced Raman scattering
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Includes: Supplementary data
Journal Articles

Nanoscale InN clusters and compositional inhomogeneities in InGaN epitaxial layers quantified by tip-enhanced Raman scattering

D. Seidlitz, E. Poliani, M. Ries, A. Hoffmann, M. R. Wagner
Journal: Applied Physics Letters
Appl. Phys. Lett. 118, 162107 (2021)
https://doi.org/10.1063/5.0040760
Published: April 2021
View article titled, Nanoscale InN clusters and compositional inhomogeneities in InGaN epitaxial layers quantified by tip-enhanced Raman scattering
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Journal Articles

Triple group-V donors in ZnO

Editor’s Pick
Manu Hegde, F. Mohammadbeigi, T. Kure, E. Senthil Kumar, M. R. Wagner, A. Hoffmann, S. P. Watkins
Journal: Journal of Applied Physics
J. Appl. Phys. 127, 075705 (2020)
https://doi.org/10.1063/1.5144203
Published: February 2020
View article titled, Triple group-V donors in ZnO
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Journal Articles

Localized thinning for strain concentration in suspended germanium membranes and optical method for precise thickness measurement

P. O. Vaccaro, M. I. Alonso, M. Garriga, J. Gutiérrez, D. Peró, M. R. Wagner, J. S. Reparaz, C. M. Sotomayor Torres, X. Vidal, E. A. Carter, P. A. Lay, M. Yoshimoto, A. R. Goñi
Journal: AIP Advances
AIP Advances 8, 115131 (2018)
https://doi.org/10.1063/1.5050674
Published: November 2018
View article titled, Localized thinning for strain concentration in suspended germanium membranes and optical method for precise thickness measurement
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Journal Articles

Excited states of neutral donor bound excitons in GaN

G. Callsen, T. Kure, M. R. Wagner, R. Butté, N. Grandjean
Journal: Journal of Applied Physics
J. Appl. Phys. 123, 215702 (2018)
https://doi.org/10.1063/1.5028370
Published: June 2018
View article titled, Excited states of neutral donor bound excitons in GaN
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Journal Articles

High quality single crystal Ge nano-membranes for opto-electronic integrated circuitry

V. A. Shah, S. D. Rhead, J. E. Halpin, O. Trushkevych, E. Chávez-Ángel, A. Shchepetov, V. Kachkanov, N. R. Wilson, M. Myronov, J. S. Reparaz, R. S. Edwards, M. R. Wagner, F. Alzina, I. P. Dolbnya, D. H. Patchett, P. S. Allred, M. J. Prest, P. M. Gammon, M. Prunnila, T. E. Whall, E. H. C. Parker, C. M. Sotomayor Torres, D. R. Leadley
Journal: Journal of Applied Physics
J. Appl. Phys. 115, 144307 (2014)
https://doi.org/10.1063/1.4870807
Published: April 2014
View article titled, High quality single crystal Ge nano-membranes for opto-electronic integrated circuitry
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Journal Articles

A novel contactless technique for thermal field mapping and thermal conductivity determination: Two-Laser Raman Thermometry

J. S. Reparaz, E. Chavez-Angel, M. R. Wagner, B. Graczykowski, J. Gomis-Bresco, F. Alzina, C. M. Sotomayor Torres
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 85, 034901 (2014)
https://doi.org/10.1063/1.4867166
Published: March 2014
View article titled, A novel contactless technique for thermal field mapping and thermal conductivity determination: Two-Laser Raman Thermometry
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Journal Articles

Reduction of the thermal conductivity in free-standing silicon nano-membranes investigated by non-invasive Raman thermometry

E. Chávez-Ángel, J. S. Reparaz, J. Gomis-Bresco, M. R. Wagner, J. Cuffe, B. Graczykowski, A. Shchepetov, H. Jiang, M. Prunnila, J. Ahopelto, F. Alzina, C. M. Sotomayor Torres
Journal: APL Materials
APL Mater. 2, 012113 (2014)
https://doi.org/10.1063/1.4861796
Published: January 2014
View article titled, Reduction of the thermal conductivity in free-standing silicon nano-membranes investigated by non-invasive Raman thermometry
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Includes: Supplementary data
Journal Articles

Spatial mapping of exciton lifetimes in single ZnO nanowires

J. S. Reparaz, G. Callsen, M. R. Wagner, F. Güell, J. R. Morante, C. M. Sotomayor Torres, A. Hoffmann
Journal: APL Materials
APL Mater. 1, 012103 (2013)
https://doi.org/10.1063/1.4808441
Published: June 2013
View article titled, Spatial mapping of exciton lifetimes in single ZnO nanowires
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Journal Articles

Structural and optical investigation of non-polar (1-100) GaN grown by the ammonothermal method

D. Gogova, P. P. Petrov, M. Buegler, M. R. Wagner, C. Nenstiel, G. Callsen, M. Schmidbauer, R. Kucharski, M. Zajac, R. Dwilinski, M. R. Phillips, A. Hoffmann, R. Fornari
Journal: Journal of Applied Physics
J. Appl. Phys. 113, 203513 (2013)
https://doi.org/10.1063/1.4807581
Published: May 2013
View article titled, Structural and optical investigation of non-polar (1-100) GaN grown by the ammonothermal method
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Journal Articles

Decay dynamics of excitonic polarons in InAs/GaAs quantum dots

S. Werner, J. S. Reparaz, M. R. Wagner, P. Zimmer, N. N. Ledentsov, J. Kabuss, M. R. Dachner, M. Richter, A. Knorr, C. Thomsen, A. Hoffmann
Journal: Journal of Applied Physics
J. Appl. Phys. 110, 074303 (2011)
https://doi.org/10.1063/1.3639310
Published: October 2011
View article titled, Decay dynamics of excitonic polarons in InAs/GaAs quantum dots
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Journal Articles

Phonon deformation potentials in wurtzite GaN and ZnO determined by uniaxial pressure dependent Raman measurements

G. Callsen, J. S. Reparaz, M. R. Wagner, R. Kirste, C. Nenstiel, A. Hoffmann, M. R. Phillips
Journal: Applied Physics Letters
Appl. Phys. Lett. 98, 061906 (2011)
https://doi.org/10.1063/1.3554434
Published: February 2011
View article titled, Phonon deformation potentials in wurtzite GaN and ZnO determined by uniaxial pressure dependent Raman measurements
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Journal Articles

Recombination dynamics in ZnO nanowires: Surfaces states versus mode quality factor

J. S. Reparaz, F. Güell, M. R. Wagner, G. Callsen, R. Kirste, S. Claramunt, J. R. Morante, A. Hoffmann
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 133116 (2010)
https://doi.org/10.1063/1.3496444
Published: October 2010
View article titled, Recombination dynamics in ZnO nanowires: Surfaces states versus mode quality factor
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Journal Articles

Reduction of the transverse effective charge of optical phonons in ZnO under pressure

J. S. Reparaz, L. R. Muniz, M. R. Wagner, A. R. Goñi, M. I. Alonso, A. Hoffmann, B. K. Meyer
Journal: Applied Physics Letters
Appl. Phys. Lett. 96, 231906 (2010)
https://doi.org/10.1063/1.3447798
Published: June 2010
View article titled, Reduction of the transverse effective charge of optical phonons in ZnO under pressure
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Journal Articles

Size-dependent recombination dynamics in ZnO nanowires

J. S. Reparaz, F. Güell, M. R. Wagner, A. Hoffmann, A. Cornet, J. R. Morante
Journal: Applied Physics Letters
Appl. Phys. Lett. 96, 053105 (2010)
https://doi.org/10.1063/1.3294327
Published: February 2010
View article titled, Size-dependent recombination dynamics in ZnO nanowires
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Journal Articles

Lithium related deep and shallow acceptors in Li-doped ZnO nanocrystals

C. Rauch, W. Gehlhoff, M. R. Wagner, E. Malguth, G. Callsen, R. Kirste, B. Salameh, A. Hoffmann, S. Polarz, Y. Aksu, M. Driess
Journal: Journal of Applied Physics
J. Appl. Phys. 107, 024311 (2010)
https://doi.org/10.1063/1.3275889
Published: January 2010
View article titled, Lithium related deep and shallow acceptors in Li-doped ZnO nanocrystals
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