Design And Optimization Of Multi-Quantum Wells For GaAs Based Vertical Cavity Surface Emitting Lasers

Jasim, Farah Z. (2011) Design And Optimization Of Multi-Quantum Wells For GaAs Based Vertical Cavity Surface Emitting Lasers. PhD thesis, Universiti Sains Malaysia.

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    Abstract

    Simulasi peranti bagi ciri-ciri elektrik dan optik laser pancaran permukaan rongga tegak (VCSEL) berasaskan GaAs telah diselidiki. Dalam laser sedemikian, kebocoran arus dan pemisahan lateral arus adalah beberapa masalah utama dalam rekabentuk VCSEL. Jadi dalam kajian ini, rekabentuk struktur VCSEL te1masuk struktur kawasan aktif telaga kuantum berbilang (MQWs) diperihalkan dan diselidiki dengan simulasi peranti Integrated System Engineering Technology Computer Aided Design (ISETCAD). Parameter struktur VCSEL divariasikan dan dioptimumkan untuk prestasi tinggi. Kajian pengoptimuman ini melibatkan aspek seperti bilangan pasangan pemantul teragih Bragg (DBRs), ketebalan telaga kuantum, jumlah telaga, pendopan kecekapan pasangan DBR, ciri haba dan beberapa pendekatan untuk meningkatkan dan mencapai kecekapan tinggi, arus ambang yang rendah dan kuasa output yang tinggi. Device simulations for the electrical and optical characteristics of GaAs based vertical cavity surface emitting lasers (VCSELs) have been investigated. In such lasers, carrier's leakage and lateral current separation are some of the major problems in VCSEL design. Thus, in this work the design of VCSEL structures including multi quantum wells (MQWs) active region are described and investigated by Integrated System Engineering Technology Computer Aided Design (ISETCAD) device simulator. The parameters of VCSEL structures are varied and optimized for high performance. This optimization study involves aspects such as the number of distributed Bragg reflectors (DBRs) pairs, thickness of quantum wells, wells number, doping of the DBR pairs, thermal characteristics and several approaches to improve and achieve high efficiency, low threshold current and high output power.

    Item Type: Thesis (PhD)
    Subjects: Q Science > QC Physics > QC1 Physics (General)
    Divisions: Pusat Pengajian Sains Fizik (School of Physics) > Thesis
    Depositing User: Mr Noorazilan Noordin
    Date Deposited: 09 Mar 2017 14:58
    Last Modified: 22 Mar 2017 10:23
    URI: http://eprints.usm.my/id/eprint/32380

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