| Issue |
Eur. Phys. J. AP
Volume 5, Number 3, March 1999
|
|
|---|---|---|
| Page(s) | 269 - 275 | |
| DOI | https://doi.org/10.1051/epjap:1999139 | |
| Published online | 15 March 1999 | |
https://doi.org/10.1051/epjap:1999139
Imaging a GaAlAs laser diode in operation using apertureless scanning near-field optical microscopy*
Laboratoire de Nanotechnologie et d'Instrumentation Optique, Université de Technologie
de Troyes,
12 rue Marie Curie, B.P. 2060, 10010 Troyes Cedex, France
Corresponding author: renaud.bachelot@univ-troyes.fr
Received:
20
July
1998
Accepted:
13
October
1998
Published online: 15 March 1999
We report the local study of an operating double hetero-junction GaAs/GaAlAs laser diode by apertureless Scanning Near-field Optical Microscopy (SNOM). This study allows the characterization of the spatial properties of the light emitted by the laser source. The optical probe used is a tungsten tip vibrating (at frequency f) perpendicularly to the emitting surface. Suitable experimental parameters permitting us to accede to near-field information have been defined. This has leaded to an experimental configuration in which the probe vibration amplitude is "optimal". A far-field detection at grazing angle is used and a second harmonic (at frequency 2f) lock-in detection is performed. This configuration has permitted us to obtain SNOM images in stimulated emission as well as in spontaneous emission. Above the threshold current, information concerning the emitted laser mode are obtained, whereas in spontaneous emission the SNOM images are linked to the index contrast of the laser diode front facet.
PACS: 61.16.Ch – Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc. / 42.30.Va – Image forming and processing / 42.55.Px – Semiconductor lasers; laser diodes
© EDP Sciences, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.