Journal ArticleDOI
Band-Edge Electroabsorption in Quantum Well Structures: The Quantum-Confined Stark Effect
David A. B. Miller,Daniel S. Chemla,T. C. Damen,Arthur C. Gossard,W. Wiegmann,Thomas H. Wood,Charles A. Burrus +6 more
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In this article, the authors present theory and extended experimental results for the large shift in optical absorption in GaAs-AlGaAs quantum well structures with electric field perpendicular to the layers.Abstract:
We present theory and extended experimental results for the large shift in optical absorption in GaAs-AlGaAs quantum well structures with electric field perpendicular to the layers. In contrast to the Stark effect on atoms or on excitons in bulk semiconductors, the exciton resonances remain resolved even for shifts much larger than the zero-field binding energy and fields g 50 times the classical ionization field. The model explains these results as a consequence of the quantum confinement of carriers.read more
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Journal ArticleDOI
Electromodulated reflectance study of self-assembled Ge/Si quantum dots
TL;DR: An electroreflectance spectroscopy of Ge/Si self-assembled quantum dots in the near-infrared and in the mid-inf infrared spectral range finds a low-energy resonance that is proposed to correspond to a band-to-continuum hole transition in the Ge valence band.
Journal ArticleDOI
Effect of defects on strain state in nonpolar a-plane GaN
TL;DR: In this paper, the influence of basal stacking fault (BSF) and impurity related defect on the strain state of a-plane GaN epilayers was investigated. And the extrapolated lattice parameters free of biaxial strain increase with the normalized yellow luminescence intensity.
Journal ArticleDOI
Towards low energy consumption integrated photonic circuits based on Ge/SiGe quantum wells
Delphine Marris-Morini,Papichaya Chaisakul,Mohamed-Said Rouifed,Jacopo Frigerio,Daniel Chrastina,Giovanni Isella,Samson Edmond,Xavier Le Roux,Jean-René Coudevylle,Laurent Vivien +9 more
TL;DR: In this paper, the authors explore recent achievements in Ge/SiGe quantum wells structures and present the challenges faced by geermanium-SiGe QW as a new photonic platform.
Patent
Solid state image wavelength converter
Amnon Manassen,Giora Yahav +1 more
TL;DR: In this paper, a method for encoding information that is encoded in spatial variations of the intensity of a first wavelength in light characterized by a second wavelength was proposed, in which electron-hole pairs are generated by absorbing photons from the first wavelength light to generate a first density distribution of electrons homologous with the spatial variations in intensity of the first-wavelength light.
Journal ArticleDOI
Vertical electro-absorption modulator design and its integration in a VCSEL
Ludovic Marigo-Lombart,Ludovic Marigo-Lombart,Stephane Calvez,Alexandre Arnoult,Hugo Thienpont,Guilhem Almuneau,Krassimir Panajotov +6 more
TL;DR: In this paper, the authors implemented a simple quantum well electroabsorption model and designed and optimized an asymmetric Fabry-Perot semiconductor modulator while considering all physical properties within figures of merit.