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Novel layered semiconductor quantum ...

Song, Yu.

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Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials./
作者:	Song, Yu.
面頁冊數:	125 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
Contained By:	Dissertation Abstracts International76-03B(E).
標題:	Electrical engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3642152
ISBN:	9781321288063

Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials.
Song, Yu.

Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials. - 125 p.

Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.

Thesis (Ph.D.)--Princeton University, 2014.

This item must not be sold to any third party vendors.

This dissertation focuses on the theory and the experimental implementation of novel phenomena and devices related to thin layered semiconductor quantum structures, especially in new material systems.

ISBN: 9781321288063Subjects--Topical Terms:

649834
Electrical engineering.

Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials.
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245 1 0 $a Novel layered semiconductor quantum structures in new material systems --- III-nitride quantum cascade emitters and detectors, light emission in Fe:ZnSe with quantum cascade laser pumping, theoretical methods with real-time Green's functions, and hyperbolic metamaterials.
300 $a 125 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-03(E), Section: B.
500 $a Adviser: Claire F. Gmachl.
502 $a Thesis (Ph.D.)--Princeton University, 2014.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a This dissertation focuses on the theory and the experimental implementation of novel phenomena and devices related to thin layered semiconductor quantum structures, especially in new material systems.
520 $a We explore quantum cascade (QC) structures in III-nitride material systems with large conduction band offsets and high longitudinal optical (LO) phonon energy. The first mid-infrared (mid-IR) intersubband (ISB) emission in III-nitride QC structures is demonstrated. The emission is purely transverse magnetic polarized, which verifies its ISB origin. The center of emission at 5 mum is clearly separated from the blackbody radiation, and agrees very well with the design. We also report the first QC detector in metal organic chemical vapor deposition grown III-nitride superlattices. A current responsivity of up to &sim; 100 muA/W and a specific detectivity of up to &sim; 1 x 108 Jones are recorded.
520 $a The non-equilibrium Green's function (NEGF) theory is employed for a profound understanding of the subband structure in layered semiconductors. A general model for handling the effects of the interface roughness in thin layered semiconductors is developed within the framework of NEGF. The model predicts an effective grading in the interfaces and an extraordinary fast roughness scattering lifetime (< 0.1 ps), both of which are re-affirmed by the experimentally observed energy shift and unusual broadening in the ISB transitions in III-nitride superlattices. These quantitative results are included in the design of the III-nitride QC emitters and detectors.
520 $a The ultra fast ISB scattering lifetime (sub-ps) is detrimental for ultra-short pulsed lasing, thus we explore other routes to this goal. We study light emission from a Fe2+:ZnSe polycrystal with QC laser pumping. Photoluminescence is achieved with its spectral and time-dependent characteristics examined. Effectively, energy stored in the upper state of the QC laser is transferred to the upper manifold of Fe2+:ZnSe with a 106 - 108 times longer lifetime.
520 $a Layering of semiconductor structures not only delivers ISB transitions but also enables strong optical anisotropy. And here the mid-IR semiconductor layered metamaterials (hyperbolic metamaterials) are also studied. The metamaterial characteristics with varied layer thicknesses are investigated. We also explore the possibility of inserting a mid-IR QC laser medium into the layered structure aiming at a reduction of the optical loss. The negative refraction characteristics are retained in the composite structure, and smooth carrier transport is achieved.
590 $a School code: 0181.
650 4 $a Electrical engineering. $3 649834
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Applied mathematics. $3 2122814
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710 2 $a Princeton University. $b Electrical Engineering. $3 2095953
773 0 $t Dissertation Abstracts International $g 76-03B(E).
790 $a 0181
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3642152