High spatial resolution spectroscopy of single semiconductor nanostructures
| العنوان: | High spatial resolution spectroscopy of single semiconductor nanostructures |
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| المؤلفون: | J. K. Trautman, L. N. Pfeiffer, J J Macklin, Timothy D. Harris, David Gershoni, M. Nirmal |
| المصدر: | Scopus-Elsevier |
| بيانات النشر: | IOP Publishing, 1996. |
| سنة النشر: | 1996 |
| مصطلحات موضوعية: | Materials science, Photoluminescence, Condensed Matter::Other, Oscillator strength, business.industry, Quantum wire, Physics::Optics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Condensed Matter::Materials Science, Materials Chemistry, Optoelectronics, Photoluminescence excitation, Nanometre, Electrical and Electronic Engineering, Quantum-optical spectroscopy, business, Spectroscopy, Quantum well |
| الوصف: | Low-temperature near-field scanning optical microscopy is used for the first time in spectroscopic studies of single, nanometre dimension, cleaved edge overgrown quantum wires. A direct experimental comparison between a two-dimensional system and a single genuinely one-dimensional quantum wire system, inaccessible to conventional far-field optical spectroscopy, is enabled by the enhanced spatial resolution. We show that the photoluminescence of a single quantum wire is easily distinguished from that of the surrounding quantum well. Emission from localized centres is shown to dominate the photoluminescence from both wires and wells at low temperatures. A factor of three oscillator strength enhancement for these wires compared with the wells is concluded from the photoluminescence excitation data. We also report room-temperature spectroscopy and dynamics of single CdSe nanocrystals. Photochemistry, trap dynamics and spectroscopy are easily determined. |
| تدمد: | 1361-6641 0268-1242 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::711c0831de60d1080d12a1209ccc5243 https://doi.org/10.1088/0268-1242/11/11s/020 |
| رقم الأكسشن: | edsair.doi.dedup.....711c0831de60d1080d12a1209ccc5243 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13616641 02681242 |
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