Mr. Giorgos Dialynas Profile

Giorgos Dialynas

at FORTH

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 28 April 2005 Paper

Polarization field effects on optical gain and lasing characteristics of III-V nitride and arsenide quantum wells

George Deligeorgis, Giorgos Dialynas, Zacharias Hatzopoulos, Nikolaos Pelekanos

Proceedings Volume 5722, (2005) https://doi.org/10.1117/12.590621

KEYWORDS: Quantum wells, Gallium, Semiconductor lasers, Laser damage threshold, Polarization, Physics, Optoelectronic devices, Laser applications

Read Abstract +

In this work, a systematic modeling study of polarization-induced internal field effects on the gain spectrum and threshold current density was performed. Two laser diodes of technological relevance: the In_0.2Ga_0.8N/GaN hexagonal nitride laser structures grown along the polar c-axis with internal field values up to 1.8MV/cm, and the In_0.1Ga_0.9As/Al_0.15Ga_0.85As (111)B laser structures with internal field values up to 100kV/cm were studied. The gain model is based on a self-consistent solution of Poisson-Schroedinger equations, and takes into account strain effects, free carrier screening, and the field dependence of gain and spontaneous emission rate. In the nitride case, some of our main findings are: (a) assuming a laser structure with a single In_0.2Ga_0.8N/GaN quantum well (QW) and a modal gain Γg=30cm^-1, the optimal QW width in terms of lowest current threshold is ≈3nm. (b) For a 3nm-wide QW and Γg=30cm^-1, the presence of the internal field increases the threshold current over the zero-field value by at least a factor of three. This factor increases further for higher Γg's. (c) The optimal number of In_0.2Ga_0.8N/GaN QWs in the active region of a nitride laser with cavity losses of 30cm^-1 is four, assuming homogeneous QW pumping. In the arsenide case, however, our modeling shows that in some circumstances the internal field is beneficial and can lead to a substantial reduction of the threshold current, especially for cavities with low optical losses. This reduction was confirmed experimentally, by measuring systematically lower threshold current densities in In_0.1Ga_0.9As/Al_0.15Ga_0.85As (111)B laser diodes, compared to (100)-ones, carrying no internal field.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years