Intersubband absorption modulation in coupled double quantum wells by external bias

K M Wong; Duncan W E Allsopp

doi:10.1088/0268-1242/24/4/045018

Intersubband absorption modulation in coupled double quantum wells by external bias

K M Wong, Duncan W E Allsopp

Department of Electronic & Electrical Engineering

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The scope for using intersubband absorption for electroabsorption modulation has been investigated by a detailed self-consistent solution of the coupled Schrodinger-Poisson equations. Rapid changes in intersubband absorption coefficient with electric field are predicted for modulation-doped In0.53Ga0.47As/AlAs deep coupled quantum wells arising from a combination of Stark effect, field-induced changes in the optical matrix elements and quantum well occupancy. Extensive simulations reveal that controlling the density of electrons in the quantum wells is potentially the most robust process for prospective high-speed modulation by intersubband electroabsorption.

Original language	English
Article number	045018
Journal	Semiconductor Science and Technology
Volume	24
Issue number	4
DOIs	https://doi.org/10.1088/0268-1242/24/4/045018
Publication status	Published - 2009

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10.1088/0268-1242/24/4/045018

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PORTABLE TERAHERTZ SYSTEMS BASED ON ADVANCE INP TECHNOLOGY - PORTRAIT
Allsopp, D.
Engineering and Physical Sciences Research Council
1/05/06 → 31/10/09
Project: Research council

Cite this

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abstract = "The scope for using intersubband absorption for electroabsorption modulation has been investigated by a detailed self-consistent solution of the coupled Schrodinger-Poisson equations. Rapid changes in intersubband absorption coefficient with electric field are predicted for modulation-doped In0.53Ga0.47As/AlAs deep coupled quantum wells arising from a combination of Stark effect, field-induced changes in the optical matrix elements and quantum well occupancy. Extensive simulations reveal that controlling the density of electrons in the quantum wells is potentially the most robust process for prospective high-speed modulation by intersubband electroabsorption.",

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AB - The scope for using intersubband absorption for electroabsorption modulation has been investigated by a detailed self-consistent solution of the coupled Schrodinger-Poisson equations. Rapid changes in intersubband absorption coefficient with electric field are predicted for modulation-doped In0.53Ga0.47As/AlAs deep coupled quantum wells arising from a combination of Stark effect, field-induced changes in the optical matrix elements and quantum well occupancy. Extensive simulations reveal that controlling the density of electrons in the quantum wells is potentially the most robust process for prospective high-speed modulation by intersubband electroabsorption.

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Intersubband absorption modulation in coupled double quantum wells by external bias

Abstract

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PORTABLE TERAHERTZ SYSTEMS BASED ON ADVANCE INP TECHNOLOGY - PORTRAIT

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