Title :
Ultrafast interferometric investigation of resonant secondary emission from quantum well excitons
Author :
Birkedal, D. ; Shah, J. ; Pfeiffer, L.N.
Author_Institution :
Bell Labs., Lucent Technol., Holmdel, NJ, USA
Abstract :
Summary form only given. We present the first direct investigation of the coherence properties of resonant secondary emission (RSE) from quantum well excitons. Using ultrafast spectral interferometry, or TADPOLE, we measure spectral fringes that are resonantly enhanced at the exciton transitions. The fringe formation is due to the coherent Rayleigh component of the RSE, and allows us to investigate the dynamics of resonant Rayleigh scattering independent from incoherent luminescence. Our observation of high-contrast spectral fringes is in contradiction with current theories of time resolved resonant Rayleigh scattering from excitons and shows for the first time the non-ergodic nature of the RSE.
Keywords :
Rayleigh scattering; high-speed optical techniques; light coherence; light interferometry; secondary electron emission; semiconductor quantum wells; coherence properties; coherent Rayleigh component; exciton transitions; excitons; high-contrast spectral fringes; incoherent luminescence; non-ergodic nature; quantum well excitons; resonant Rayleigh scattering; resonant secondary emission; resonantly enhanced; spectral fringes; time resolved resonant Rayleigh scattering; ultrafast interferometric investigation; Excitons; Light scattering; Optical interferometry; Optical polarization; Optical scattering; Optical superlattices; Particle scattering; Rayleigh scattering; Resonance light scattering; Ultrafast optics;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 1999. QELS '99. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-576-X
DOI :
10.1109/QELS.1999.807456
