title: Mode selection in InAs quantum dot microdisk lasers using focused ion beam technique.
abstract: Optically pumped InAs quantum dot microdisk lasers with grooves etched on their surface by a focused ion beam are studied. It is shown that the radial grooves, depending on their length, suppress the lasing of specific radial modes of the microdisk. Total suppression of all radial modes, except for the fundamental radial one, is also demonstrated. The comparison of laser spectra measured at 78 K before and after ion beam etching for a microdisk of 8 μm in diameter shows a sixfold increase of mode spacing, from 2.5 to 15.5 nm, without a significant decrease of the dominant mode quality factor. Numerical simulations are in good agreement with experimental results.
authors.forename: A A
authors.initials: AA
authors.lastname: Bogdanov
authors.forename: I S
authors.initials: IS
authors.lastname: Mukhin
authors.forename: N V
authors.initials: NV
authors.lastname: Kryzhanovskaya
authors.forename: M V
authors.initials: MV
authors.lastname: Maximov
authors.forename: Z F
authors.initials: ZF
authors.lastname: Sadrieva
authors.forename: M M
authors.initials: MM
authors.lastname: Kulagina
authors.forename: Yu M
authors.initials: YM
authors.lastname: Zadiranov
authors.forename: A A
authors.initials: AA
authors.lastname: Lipovskii
authors.forename: E I
authors.initials: EI
authors.lastname: Moiseev
authors.forename: Yu V
authors.initials: YV
authors.lastname: Kudashova
authors.forename: A E
authors.initials: AE
authors.lastname: Zhukov