Simplified modeling of frequency behavior in photonic crystal vertical cavity surface emitting laser with tunnel injection quantum dot in active region

doi:10.1088/1674-1056/26/2/024211

Abstract In this work, the characteristics of the photonic crystal tunneling injection quantum dot vertical cavity surface emitting lasers (PhC-TIQD-VCSEL) are studied through analyzing a modified modulation transfer function. The function is based on the rate equations describing the carrier dynamics at different energy levels of dot and injector well. Although the frequency modulation response component associated with carrier dynamics in wetting layer (WL) and at excited state (ES) levels of dots limits the total bandwidth in conventional QD-VCSEL, our study shows that it can be compensated for by electron tunneling from the injector well into the dot in TIQD structure. Carrier back tunneling time is one of the most important parameters, and by increment of that, the bias current dependence of the total bandwidth will be insignificant. It is proved that at high bias current, the limitation of the WL-ES level plays an important role in reducing the total bandwidth and results in rollovers on 3-dB bandwidth-I curves. In such a way, for smaller air hole diameter of photonic crystal, the effect of this reduction is stronger.

Keywords: modulation transfer function photonic crystal (PhC) tunnel injection quantum dot (TIQD) vertical cavity surface emitting laser (VCSEL)

Received: 19 July 2016
Revised: 17 October 2016
Accepted manuscript online:

PACS:	42.55.Px	(Semiconductor lasers; laser diodes)
	42.55.Tv	(Photonic crystal lasers and coherent effects)

Corresponding Authors: Mehdi Riahinasab, Vahid Ahmadi, Elham Darabi
E-mail: m.riahinasab@srbiau.ac.ir;v_ahmadi@modares.ac.ir;e.darabi@srbiau.ac.ir

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Mehdi Riahinasab, Vahid Ahmadi, Elham Darabi Simplified modeling of frequency behavior in photonic crystal vertical cavity surface emitting laser with tunnel injection quantum dot in active region 2017 Chin. Phys. B 26 024211

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Simplified modeling of frequency behavior in photonic crystal vertical cavity surface emitting laser with tunnel injection quantum dot in active region

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