Low threshold optical bistability and superluminal light propagation using a dielectric slab via inter-dot tunneling. (10th March 2015)

• Record Type: Journal Article
• Authors: Taherzadeh, S; Nasehi, R; Mahmoudi, Mohammad
• Is Part Of: Laser physics. Volume 25:Number 4(2015:Apr.)
• Publication Date: 2015-03-10
• Subjects: optical bistability -- quantum dot molecule -- dielectric slab; Lasers -- Periodicals; 621.36605
• DOI: 10.1088/1054-660X/25/4/045901
• Languages: English
• ISSNs: 1054-660X

Abstract

Abstract: The optical bistability (OB) behavior of a dielectric slab doped with quantum dot (QD) molecules is investigated in the presence of the inter-dot tunneling effect. It is shown that the threshold point of OB reduces by increasing inter-dot tunneling as well as by reducing the slab thickness. It is worth noting that the threshold of OB in a slab doped with QD molecules is smaller, by at least one order of magnitude, in respect to free QD molecules. We find that the inter-dot tunneling induces a negative group delay to the reflected pulse and it propagates in the superluminal region. Such simple control can be used in all optical switching.