title: Ion-beam-assisted spatial modulation of inhomogeneous broadening of a quantum well resonance: excitonic diffraction grating.
abstract: 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 <1012cm-2. 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.
authors.forename: Yu V
authors.initials: YV
authors.lastname: Kapitonov
authors.forename: P Yu
authors.initials: PY
authors.lastname: Shapochkin
authors.forename: L Yu
authors.initials: LY
authors.lastname: Beliaev
authors.forename: Yu V
authors.initials: YV
authors.lastname: Petrov
authors.forename: Yu P
authors.initials: YP
authors.lastname: Efimov
authors.forename: S A
authors.initials: SA
authors.lastname: Eliseev
authors.forename: V A
authors.initials: VA
authors.lastname: Lovtcius
authors.forename: V V
authors.initials: VV
authors.lastname: Petrov
authors.forename: V V
authors.initials: VV
authors.lastname: Ovsyankin