I. Mckerracher, J. Wong-Leung, G. Jolley, L. Fu, H. Tan, C. Jagadish
{"title":"Spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors using selective-area intermixing","authors":"I. Mckerracher, J. Wong-Leung, G. Jolley, L. Fu, H. Tan, C. Jagadish","doi":"10.1109/COMMAD.2010.5699773","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699773","url":null,"abstract":"Quantum dot intermixing is a post-growth approach to tuning optoelectronic devices. SiO2 capping layers can enhance these effects through impurityfree vacancy disordering, whereas TiO2 caps can decrease intermixing. In this study, multi-colour quantum dot infrared photodetectors were fabricated through selective intermixing and four different encapsulants were investigated.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125169480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photonic self-router made of semiconductor and liquid crystal","authors":"M. Saito, K. Yoshimura, K. Kanatani","doi":"10.1109/COMMAD.2010.5699758","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699758","url":null,"abstract":"A liquid crystal (LC) cell made of silicon (Si) electrodes was fabricated to achieve self-routing of optical signals. As optical pulses (1.06 µm wavelength) passed through the cell, they excited free carriers in the Si electrode, which triggered the voltage application to the LC layer. Consequently, the polarization direction of the succeeding pulses became perpendicular to that of the preceding pulses, and they were routed to different directions by a polarization beam splitter. Optical pulses or packets were self-routed to one of the output ports, as they passed through the cascaded LC cell.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125907817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Non-uniform composition distribution in alloy quantum structures","authors":"N. Medhekar","doi":"10.1109/COMMAD.2010.5699725","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699725","url":null,"abstract":"Based on a combination of finite element and quadratic programming optimization methods, we have developed an efficient numerical technique to compute the equilibrium composition profiles in coherent and dislocated alloy quantum crystals. We demonstrate that the variations in composition profiles arise due to the competition between chemical mixing effects and the relaxation of composition-dependent mismatch strain as well as strain due to dislocations. This approach provides the means for a quantitative description of the factors controlling equilibrium composition profiles in various coherent and dislocated self-organized alloy systems.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122629913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Plasmons for enhancing solar cells","authors":"K. Catchpole","doi":"10.1109/COMMAD.2010.5699692","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699692","url":null,"abstract":"We review recent progress and future prospects for enhancement of solar cells using plasmonic resonances on metal nanoparticles.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124721361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Polarization induced high mobility wide electron slabs in graded pseudomorph MgxZn1−xO/ZnO heterostructure","authors":"J. Ye, G. Lo, S. Gu, K. Teo","doi":"10.1109/COMMAD.2010.5699741","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699741","url":null,"abstract":"In this work, we demonstrate the layer-by-layer epitaxy of Mg-composition graded ZnMgO/ZnO heterostructure on sapphire substrate by MOVPE technique. The polarization field tailored by the graded heterostructure induces wide electron slabs with high mobility at low temperature. The transport properties and mechanisms have been discussed in details.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124014391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimisation of reflective interferometric properties of nanoporous anodic aluminium oxide (AAO) for biosensing applications","authors":"T. Kumeria, Collin Hall, D. Losic","doi":"10.1109/COMMAD.2010.5699781","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699781","url":null,"abstract":"Optimisation of reflective interferometric properties of nanoporous aluminium oxide (AAO) fabricated by electrochemical anodization using different conditions is presented. The influence of structural modification of pores includeing the changing of pore diameters and pore depth on interference pattern was investigated. Chemical modification of pore surface such as metal deposition and nanoparticle immobilisation was additionally used to further optimise interference properties of AAO. The results of this study will be used for development of the label-free interferometric biosensor or chemosensors with increased sensitivity.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123616002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Increasing the coupling efficiency of a microdisk laser to waveguides by using spiral structures","authors":"D. Liu, H. Hattori, L. Fu, H. Tan, C. Jagadish","doi":"10.1109/COMMAD.2010.5699784","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699784","url":null,"abstract":"In this article, we show that the introduction of a spiral waveguide to a GaAs microdisk that works both as a waveguide and circular Bragg reflector can improve coupling efficiency to almost 90%. The same structure with the addition of a taper can couple up to 80% of the generated power into a slot waveguide.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125476687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-performance thin-film garnet materials for Magneto-Optic and nanophotonic applications","authors":"M. Vasiliev, M. Nur-E-Alam, V. Kotov, K. Alameh","doi":"10.1109/COMMAD.2010.5699797","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699797","url":null,"abstract":"Since the 1960's, Magneto-optic (MO) garnet materials have been studied extensively. These materials can possess world-record MO performance characteristics in terms of Faraday rotation and optical quality. Among the rear-earth-doped garnets, the Bi-substituted iron garnet is the best candidate for use as a functional material in different integrated-optics, imaging/image processing applications and also in forward-looking applications e.g. the design of metamaterials with non-reciprocal properties. We have established a set of technologies for fabricating ferrimagnetic garnet films of type (BiDy)3(FeGa)5O12 and also garnet-oxide nanocomposite (BiDy)3(FeGa)5O12 : Bi2O3 layers possessing record-high MO quality across the visible spectral range [1] using RF-magnetron sputtering and oven annealing. Our MO garnet films possess excellent optical and magnetic properties, which make them very attractive and promising for a large range of optoelectronic, photonics-related and MO imaging applications.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128175234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Umana-Membreno, T. Fehlberg, S. Kolluri, D. Brown, G. Parish, B. Nener, S. Keller, U. Mishra, L. Faraone
{"title":"Anisotropic two-dimensional electron gas transport in N-polar GaN/AlGaN heterostructures grown on vicinal substrates","authors":"G. Umana-Membreno, T. Fehlberg, S. Kolluri, D. Brown, G. Parish, B. Nener, S. Keller, U. Mishra, L. Faraone","doi":"10.1109/COMMAD.2010.5699736","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699736","url":null,"abstract":"In this work, we present results of a magneto-transport study of two-dimensional electron gas transport in N-polar GaN/AlGaN heterostuctures grown on misoriented sapphire substrates. It is shown that the multi-atomic “steps” resulting from epitaxial growth on misoriented substrates leads to significantly lower average two-dimensional electron gas (2DEG) mobility in the direction perpendicular to the interfacial steps which is accompanied by significant broadening of the 2DEG mobility distribution.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121744412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Matsuda, Zhanghai Chen, R. Shen, S. Takeyama, K. Kindo
{"title":"Magneto-photoluminescence of ZnO microrods in high magnetic fields of up to 50 T","authors":"Y. Matsuda, Zhanghai Chen, R. Shen, S. Takeyama, K. Kindo","doi":"10.1109/COMMAD.2010.5699699","DOIUrl":"https://doi.org/10.1109/COMMAD.2010.5699699","url":null,"abstract":"We have investigated the magnetic field dependence of the photoluminescence (PL) of ZnO microrods. Several excitonic PL peaks were observed. We found that the spectra showed weak energy shift by applying magnetic fields. It is likely that the field variation of the exciton energy shift depends on measurement temperature.","PeriodicalId":129653,"journal":{"name":"2010 Conference on Optoelectronic and Microelectronic Materials and Devices","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123979725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}