Terahertz Bandwidth All-Optical Modulation and Logic Using Multiexcitons in Semiconductor Nanocrystals

Autor:	Brenna R. Walsh, Michael M. Krause, Jonathan I. Saari, Patanjali Kambhampati
Rok vydání:	2013
Předmět:	Signal processing Materials science Terahertz radiation business.industry Mechanical Engineering Bioengineering General Chemistry Condensed Matter Physics Optical pumping Quantum dot Femtosecond Optoelectronics Inverter General Materials Science Stimulated emission business AND gate
Zdroj:	Nano Letters. 13:722-727
ISSN:	1530-6992 1530-6984
DOI:	10.1021/nl3044053
Popis:	Optical pumping of semiconductor nanocrystals with femtosecond pulse sequences was performed in order to modulate multiexciton populations. We show for the first time that control of multiexciton populations produces high speed modulation of stimulated emission. Upon the basis of the speed of multiexcitonic processes in nanocrystals, we show modulation rates approaching 1 THz by virtue of strong quantum confinement effects. Employing femtosecond optical pulse sequences, we demonstrate all-optical logic using these nanocrystals in two forms: an AND gate, and an inverter, a key step toward all optical signal processing.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1c821a12d1f41e4ae7ae2bda834ffa8 https://doi.org/10.1021/nl3044053 Zobrazit plný text záznamu