Temperature sensitivity of 1.55μm (100) InAs/InP-based quantum dot lasers
Sayid, SA, Marko, IP, Sweeney, SJ and Poole, P (2010) Temperature sensitivity of 1.55μm (100) InAs/InP-based quantum dot lasers In: 22nd IPRM, 2010-05-31 - 2010-06-04, Kagawa, Japan.
Temperature sensitivity of 1.55μm (100) InAs-InP-based quantum dot lasers.pdf
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Semiconductor lasers with quantum dot (QD) based active regions have generated a huge amount of interest for applications including communications networks due to their anticipated superior physical properties due to three dimensional carrier confinement. For example, the threshold current of ideal quantum dots is predicted to be temperature insensitive. We have investigated the operating characteristics of 1.55 μm InAs/InP (100) quantum dot lasers focusing on their carrier recombination characteristics using a combination of low temperature and high pressure measurements. By measuring the intrinsic spontaneous emission from a window fabricated in the n-contact of the devices we have measured the radiative component of the threshold current density, Jrad. We find that Jrad is itself relatively temperature insensitive (Fig. 1). However, the total threshold current density, Jth, increases significantly with temperature leading to a characteristic temperature T0~72 K around 220 K-290 K. From this data it is clear that the devices are dominated by a non-radiative recombination process which accounts for up to 94% of the threshold current at room temperature (Fig. 1).
|Item Type:||Conference or Workshop Item (Conference Paper)|
|Divisions :||Faculty of Engineering and Physical Sciences > Physics|
|Identification Number :||10.1109/ICIPRM.2010.5516172|
|Additional Information :||© 2010 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.|
|Depositing User :||Symplectic Elements|
|Date Deposited :||19 Dec 2012 17:42|
|Last Modified :||23 Sep 2013 19:47|
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