Details

Autor(en) / Beteiligte

• Kapitonov, Yu V
• Shapochkin, P Yu
• Beliaev, L Yu
• Petrov, Yu V
• Efimov, Yu P
• Eliseev, S A
• Lovtcius, V A
• Petrov, V V
• Ovsyankin, V V

Titel

Ion-beam-assisted spatial modulation of inhomogeneous broadening of a quantum well resonance: excitonic diffraction grating

Ist Teil von

• Optics letters, 2016-01, Vol.41 (1), p.104-106

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

Optica Publishing Group Journals

Beschreibungen/Notizen

• We propose a method of spatial modulation of inhomogeneous broadening of a quantum-well excitonic resonance based on local generation of defects produced by a focused ion beam. The method is applied to fabrication of excitonic diffraction grating in a single quantum-well InGaAs/GaAs structure by irradiating the sample with a beam of 35-keV He ions of exposure doses <10   cm . The spectrum of resonant diffraction on such a structure is narrower than that of reflectivity and decreases much faster with increasing temperature. A proposed model of formation of the diffractive response based on the single scattering approximation well describes the results of the spectral and temperature measurements.