The properties of InGaAsN V-groove QWRs are assessed here by polarization-dependent photoluminescence (PL) and micro-magneto-PL. Both the polarization anisotropy of the QWR emission and the strong dependence of the diamagnetic shift on the orientation of the applied magnetic field confirm the 1D nature of the QWR excitons. Further, the possibility of passivating N impurities by H irradiation is used to estimate the N content (x) in the QWRs by turning off the effects of N incorporation. Both the H-induced blueshift of the QWR emission (70 meV) and the measured value of the electron effective mass are consistent with x ∼1%. Nitrogen is also found to enhance the In intake in the QWR, likely due to the strain reduction resulting from the smaller lattice parameter of the InGaAsN alloy. Such strain reduction is also responsible for the quick decay of the degree of linear polarization (ρ) of the QWR emission with increasing temperature, indicating a small splitting between the QWR valence-band levels. In fully hydrogenated samples, conversely, ρ remains roughly constant up to ∼240 K, suggesting the recovery of a larger energy separation between the QWR hole states upon N passivation.

Effects of hydrogen irradiation on the optical and electronic properties of site-controlled InGaAsN V-groove quantum wires / Felici, Marco; Polimeni, Antonio; Giovanna, Lavenuta; Elena, Tartaglini; DE LUCA, Marta; Capizzi, Mario; Andrea, Notargiacomo; Romain, Carron; Dan, Fekete; Pascal, Gallo; Benjamin, Dwir; Alok, Rudra; Eli, Kapon; Pettinari, Giorgio; Peter C. m., Christianen; Jan C., Maan. - In: PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS. - ISSN 1862-6351. - STAMPA. - 10:4(2013), pp. 556-560. [10.1002/pssc.201200379]

Effects of hydrogen irradiation on the optical and electronic properties of site-controlled InGaAsN V-groove quantum wires

FELICI, Marco;POLIMENI, Antonio;DE LUCA, MARTA;CAPIZZI, Mario;PETTINARI, GIORGIO;
2013

Abstract

The properties of InGaAsN V-groove QWRs are assessed here by polarization-dependent photoluminescence (PL) and micro-magneto-PL. Both the polarization anisotropy of the QWR emission and the strong dependence of the diamagnetic shift on the orientation of the applied magnetic field confirm the 1D nature of the QWR excitons. Further, the possibility of passivating N impurities by H irradiation is used to estimate the N content (x) in the QWRs by turning off the effects of N incorporation. Both the H-induced blueshift of the QWR emission (70 meV) and the measured value of the electron effective mass are consistent with x ∼1%. Nitrogen is also found to enhance the In intake in the QWR, likely due to the strain reduction resulting from the smaller lattice parameter of the InGaAsN alloy. Such strain reduction is also responsible for the quick decay of the degree of linear polarization (ρ) of the QWR emission with increasing temperature, indicating a small splitting between the QWR valence-band levels. In fully hydrogenated samples, conversely, ρ remains roughly constant up to ∼240 K, suggesting the recovery of a larger energy separation between the QWR hole states upon N passivation.
2013
optical properties; v-groove quantum wires; hydrogen in semiconductors; dilute nitrides
01 Pubblicazione su rivista::01a Articolo in rivista
Effects of hydrogen irradiation on the optical and electronic properties of site-controlled InGaAsN V-groove quantum wires / Felici, Marco; Polimeni, Antonio; Giovanna, Lavenuta; Elena, Tartaglini; DE LUCA, Marta; Capizzi, Mario; Andrea, Notargiacomo; Romain, Carron; Dan, Fekete; Pascal, Gallo; Benjamin, Dwir; Alok, Rudra; Eli, Kapon; Pettinari, Giorgio; Peter C. m., Christianen; Jan C., Maan. - In: PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS. - ISSN 1862-6351. - STAMPA. - 10:4(2013), pp. 556-560. [10.1002/pssc.201200379]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/515414
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