This paper presents a new concept of quantum-chaotic encoding of light traveling in a fiber optic ring resonator. The Kerr nonlinear effects type of light in a fiber optic ring resonator is induced, and the four-wave mixing of the propagating waves at resonance occurred. The output signals can generate the double security which one is the quantum bits i.e. code, and the other is the chaotic signal/code. The proposed system has shown the potential of using for communication security, where the double security via the quantum-chaotic encoding can be performed.
{"title":"Quantum chaotic signals generated by a nonlinear micro-ring resonator","authors":"C. Sripakdee, W. Suwancharoen, P. Yupapin","doi":"10.1117/12.799535","DOIUrl":"https://doi.org/10.1117/12.799535","url":null,"abstract":"This paper presents a new concept of quantum-chaotic encoding of light traveling in a fiber optic ring resonator. The Kerr nonlinear effects type of light in a fiber optic ring resonator is induced, and the four-wave mixing of the propagating waves at resonance occurred. The output signals can generate the double security which one is the quantum bits i.e. code, and the other is the chaotic signal/code. The proposed system has shown the potential of using for communication security, where the double security via the quantum-chaotic encoding can be performed.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123185114","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}
A new scheme of the entangled photon states re-generation the dynamic simulation of light traveling in nonlinear fiber optic ring resonator incorporating an erbium-doped fiber (EDF) has been investigated. We have shown that the weak entangled photon states can be recovered after circulating in the amplified fiber optic medium. The output entangled photon states can be re-generated by adjusting the polarization controller of the amplified photons, where the re-generated entangled states can be controlled and performed. The ring-cavity lifetime is much longer than the Kerr-effect response time of the fiber ring. The results obtained have shown that this system can be used to achieve the recovered polarization entangled states with the obtained high gain. The amplifying noise has also been detected and seen on the spectrum output. This is affected to the entangled photon visibility, which is discussed.
{"title":"The entangled photon regeneration and characterization in a nonlinear fiber ring resonator incorporating an erbium-doped fiber","authors":"W. Khunnam, P. Yupapin","doi":"10.1117/12.799529","DOIUrl":"https://doi.org/10.1117/12.799529","url":null,"abstract":"A new scheme of the entangled photon states re-generation the dynamic simulation of light traveling in nonlinear fiber optic ring resonator incorporating an erbium-doped fiber (EDF) has been investigated. We have shown that the weak entangled photon states can be recovered after circulating in the amplified fiber optic medium. The output entangled photon states can be re-generated by adjusting the polarization controller of the amplified photons, where the re-generated entangled states can be controlled and performed. The ring-cavity lifetime is much longer than the Kerr-effect response time of the fiber ring. The results obtained have shown that this system can be used to achieve the recovered polarization entangled states with the obtained high gain. The amplifying noise has also been detected and seen on the spectrum output. This is affected to the entangled photon visibility, which is discussed.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127033408","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}
In this work the capacitance of AlGaN/GaN heterostructure in presence of InN quantum dots has been studied. This calculation has been done for different InN quantum Dot size, energy dispersion and in different temperatures. The presence of InN quantum dot will cause a negative differential capacitance which can evidence the position of quantum dots in the structures. Our calculation results show this negative differential capacitance is much higher at low temperature and for quantum dots with low energy and higher size dispersion.
{"title":"Negative differential capacitance of AlGaN/GaN heterostructure in presence of InN quantum dots","authors":"A. Asgari","doi":"10.1117/12.798950","DOIUrl":"https://doi.org/10.1117/12.798950","url":null,"abstract":"In this work the capacitance of AlGaN/GaN heterostructure in presence of InN quantum dots has been studied. This calculation has been done for different InN quantum Dot size, energy dispersion and in different temperatures. The presence of InN quantum dot will cause a negative differential capacitance which can evidence the position of quantum dots in the structures. Our calculation results show this negative differential capacitance is much higher at low temperature and for quantum dots with low energy and higher size dispersion.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117213525","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. Panitchob, G. Senthil Murugan, M. Zervas, J. Wilkinson
Quality-factors of waveguide coupled microsphere resonators of 30 μm diameter are measured. A Teflon buffer layer is deposited on the waveguide to separate the microsphere from the waveguide and the effect of this separation on the measured quality-factor is discussed. The whispering-gallery mode propagation along the cavity of the microsphere as well as the optical path lengths of the modes are determined; the experimental and theoretical data are compared and discussed. A five-fold increase of the Q-factor was obtained by increasing the sphere-waveguide separation.
{"title":"Q-factor and waveguide-sphere separation effects in waveguide-coupled microsphere resonators","authors":"Y. Panitchob, G. Senthil Murugan, M. Zervas, J. Wilkinson","doi":"10.1117/12.799260","DOIUrl":"https://doi.org/10.1117/12.799260","url":null,"abstract":"Quality-factors of waveguide coupled microsphere resonators of 30 μm diameter are measured. A Teflon buffer layer is deposited on the waveguide to separate the microsphere from the waveguide and the effect of this separation on the measured quality-factor is discussed. The whispering-gallery mode propagation along the cavity of the microsphere as well as the optical path lengths of the modes are determined; the experimental and theoretical data are compared and discussed. A five-fold increase of the Q-factor was obtained by increasing the sphere-waveguide separation.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"206 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133928746","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}
The research objective was to study 1) the situation and readiness of the Thai education for the integration of nanotechnology and 2) to propose the plans, the strategies and guidelines for educational reform to adapt nanotechnology to the system. The data collection was done by 4 methods: 1) documentary study, 2) observation, 3) informal interviews, and 4) group discussion. The findings revealed that: 1. William Wresch's Theory (1997) was used in this research to study of the situation and readiness of the Thai education for the integration of nanotechnology. 1) Getting connected to nanotechnology by search engine websites, libraries, magazines, books, and discussions with experts. 2) Curriculum integration: nanotechnology should be integrated in many branches of engineering, such as industrial, computer, civil, chemical, electrical, mechanical, etc. 3) Resources for educators: nanotechnology knowledge should be spread in academic circles by publications and the Internet websites. 4) Training and professional resources for teachers: Teachers should be trained by experts in nanotechnology and researchers from the National Nanotechnology Center. This will help trainees get correct knowledge, comprehension, and awareness in order to apply to their professions and businesses in the future. 2. As for the plans, the strategies, and guidelines for educational reform to adapt nanotechnology to the present system, I analyzed the world nanotechnology situation that might have an effect on Thai society. The study is based on the National Plan to Develop Nanotechnology. The goal of this plan is to develop nanotechnology to be the national strategy within 10 years (2004-2013) and have it integrated into the Thai system. There are 4 parts in this plan: 1) nanomaterials, 2) nanoelectronics, 3) nanobiotechnology, and 4) human resources development. Data for human resource development should be worked with the present technology and use the country's resources to produce many products of nanotechnology, such as 1) handicrafts, decorations, and gifts, 2) agricultural products and food, 3) beverages, such as alcoholic and non- alcoholic drinks, and 5) textiles.
{"title":"The effect of nanotechnology on education","authors":"C. Viriyavejakul","doi":"10.1117/12.799258","DOIUrl":"https://doi.org/10.1117/12.799258","url":null,"abstract":"The research objective was to study 1) the situation and readiness of the Thai education for the integration of nanotechnology and 2) to propose the plans, the strategies and guidelines for educational reform to adapt nanotechnology to the system. The data collection was done by 4 methods: 1) documentary study, 2) observation, 3) informal interviews, and 4) group discussion. The findings revealed that: 1. William Wresch's Theory (1997) was used in this research to study of the situation and readiness of the Thai education for the integration of nanotechnology. 1) Getting connected to nanotechnology by search engine websites, libraries, magazines, books, and discussions with experts. 2) Curriculum integration: nanotechnology should be integrated in many branches of engineering, such as industrial, computer, civil, chemical, electrical, mechanical, etc. 3) Resources for educators: nanotechnology knowledge should be spread in academic circles by publications and the Internet websites. 4) Training and professional resources for teachers: Teachers should be trained by experts in nanotechnology and researchers from the National Nanotechnology Center. This will help trainees get correct knowledge, comprehension, and awareness in order to apply to their professions and businesses in the future. 2. As for the plans, the strategies, and guidelines for educational reform to adapt nanotechnology to the present system, I analyzed the world nanotechnology situation that might have an effect on Thai society. The study is based on the National Plan to Develop Nanotechnology. The goal of this plan is to develop nanotechnology to be the national strategy within 10 years (2004-2013) and have it integrated into the Thai system. There are 4 parts in this plan: 1) nanomaterials, 2) nanoelectronics, 3) nanobiotechnology, and 4) human resources development. Data for human resource development should be worked with the present technology and use the country's resources to produce many products of nanotechnology, such as 1) handicrafts, decorations, and gifts, 2) agricultural products and food, 3) beverages, such as alcoholic and non- alcoholic drinks, and 5) textiles.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115053957","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}
W. Khunsin, G. Kocher, S. Romanov, C. S. Sotomayor Torres
Crystal ordering of colloidal self-assembled photonic crystals fabricated by vertical drawing deposition technique has been improved following application of acoustic noise vibrations. The scanning electron microscopy has confirmed the improvement in the crystal order on the surface (111) plane and has demonstrated that thin opal films crystallized under acoustic agitation consist of similarly oriented crystallites, the characteristic transverse dimension of which is larger compared to that of sample grown without acoustic field. Three-dimensional lattice arrangement of the opal crystal has been examined by means of laser diffraction and optical transmission spectroscopy. Novel approach towards optical characterisation of the opal crystallinity has been suggested.
{"title":"Improving the opal-based photonic crystals by noise-assisted crystallisation","authors":"W. Khunsin, G. Kocher, S. Romanov, C. S. Sotomayor Torres","doi":"10.1117/12.799253","DOIUrl":"https://doi.org/10.1117/12.799253","url":null,"abstract":"Crystal ordering of colloidal self-assembled photonic crystals fabricated by vertical drawing deposition technique has been improved following application of acoustic noise vibrations. The scanning electron microscopy has confirmed the improvement in the crystal order on the surface (111) plane and has demonstrated that thin opal films crystallized under acoustic agitation consist of similarly oriented crystallites, the characteristic transverse dimension of which is larger compared to that of sample grown without acoustic field. Three-dimensional lattice arrangement of the opal crystal has been examined by means of laser diffraction and optical transmission spectroscopy. Novel approach towards optical characterisation of the opal crystallinity has been suggested.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"247 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121125901","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}
In this paper, we design the ring resonator filters such as moving average (MA), autoregressive (AR) and autoregressive moving average (ARMA) filters. These filters are designed as add/drop filter, channel selection and dispersion compensator. The transfer functions of optical filters are derived using Z-transforms.
{"title":"Design of optical ring resonator filters for WDM applications","authors":"P. Saeung, P. Yupapin","doi":"10.1117/12.799425","DOIUrl":"https://doi.org/10.1117/12.799425","url":null,"abstract":"In this paper, we design the ring resonator filters such as moving average (MA), autoregressive (AR) and autoregressive moving average (ARMA) filters. These filters are designed as add/drop filter, channel selection and dispersion compensator. The transfer functions of optical filters are derived using Z-transforms.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488235","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}
We fabricated an FePt/MgO tunneling junction (Fe55Pt45) with out-of-plane magnetization on a GaAs-based light-emitting-diode structure. The technique of spin-polarized electroluminescence (EL) was used to study the electrical spin injection from FePt into GaAs at room temperature. Under the magnetic field of 1 T the spin polarization of the injected electrons was at least 6.0%. The zero-magnetic-field spin polarization, which indicates the spin injection without magnetic field, was at least 3.3%.
{"title":"Electrical spin injection from an iron-rich iron-platinum thin film into gallium arsenide","authors":"A. Sinsarp, T. Manago, F. Takano, H. Akinaga","doi":"10.1117/12.799422","DOIUrl":"https://doi.org/10.1117/12.799422","url":null,"abstract":"We fabricated an FePt/MgO tunneling junction (Fe55Pt45) with out-of-plane magnetization on a GaAs-based light-emitting-diode structure. The technique of spin-polarized electroluminescence (EL) was used to study the electrical spin injection from FePt into GaAs at room temperature. Under the magnetic field of 1 T the spin polarization of the injected electrons was at least 6.0%. The zero-magnetic-field spin polarization, which indicates the spin injection without magnetic field, was at least 3.3%.","PeriodicalId":426962,"journal":{"name":"International Workshop and Conference on Photonics and Nanotechnology","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127992202","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}
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