Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10231363

N. Namekata, Nobuaki Kobayashi, Kenya Nomura, Tokuei Sako, Norio Takata, S. Inoue

{"title":"Quantum Optical Tomography Using a Time-Resolved and Mode-Selective Frequency-Up-Conversion Detector","authors":"N. Namekata, Nobuaki Kobayashi, Kenya Nomura, Tokuei Sako, Norio Takata, S. Inoue","doi":"10.1109/CLEO/Europe-EQEC57999.2023.10231363","DOIUrl":"https://doi.org/10.1109/CLEO/Europe-EQEC57999.2023.10231363","url":null,"abstract":"Optical coherence tomography (OCT) is a well-established non-contact and non-invasive method for three-dimensional structural imaging of complex samples [1]. This technique is actively used for various biomedical applications, such as medical diagnosis. However, the relatively shallow penetration depth is considered a serious limitation for many applications. Optical time-of-flight (TOF) measurements provide an alternative way to acquire three-dimensional structural images. A temporal resolution of 150 femtoseconds corresponding to the axial resolution comparable to OCT has been reported [2]. The penetration depth would be enhanced by using the wavelength in the spectral window of 1550 - 1800 nm, because the scattering and absorption losses can be reduced. Besides them, the phenomenon of multiple scattering also makes it difficult to achieve meaningful structural information at deeper penetration depths. To enhance image contrast at larger penetration depths, multiply scattered photons must be removed. Although they overlap in both spectral and time domain with the singly reflected signal photons, they would be removed by the mode-selective up-conversion single-photon detector (UCSPD) [3], [4]. We report on the optical TOF measurement system using the time-resolved and mode-selective UCSPD and its application to the tomographic image acquisition of a mouse brain.","PeriodicalId":19477,"journal":{"name":"Oceans","volume":"195 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81426930","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}

引用次数: 0

Effect of the Gouy-Phase on Field-Induced Transport Across a Nanojunction 高伊相对纳米结场致输运的影响

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10231843

Andrea Rossetti, M. Ludwig, A. Leitenstorfer, D. Brida

引用次数: 0

Miniaturized Terahertz Photonic Chips 小型化太赫兹光子芯片

Oceans Pub Date : 2023-06-26 DOI: 10.1109/cleo/europe-eqec57999.2023.10231981

Yazan Lampert, Francesco Bertot, Alexa Herter, A. Shams-Ansari, Alessandro Tomasino, S. Rajabali, Marko Lončar, Ileana-Cristina Benea-Chelmus

引用次数: 0

Optical Dispersion in Waveguides Based upon the Pancharatnam-Berry Phase 基于Pancharatnam-Berry相位的波导色散

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10232844

Stree Vithya Arumugam, C. Jisha, A. Alberucci, Stefan Nolte

引用次数: 0

Environment-Dependent Holographic Metasurfaces in the Visible Range 可见光范围内环境相关全息超表面

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10232176

Jianling Xiao, Libin Yan, T. Plaskocinski, Mohammad Biabanifard, Saydulla Persheyev, Meisam Askari, Andrea Di Falco

引用次数: 0

Ab initio Calculations of the Thermoelectric Phonon Drag Effect in Semiconductor Nanostructures 半导体纳米结构中热电声子拖拽效应的从头计算

Oceans Pub Date : 2023-06-26 DOI: 10.1109/cleo/europe-eqec57999.2023.10232794

Raja Sen, N. Vast, J. Sjakste

{"title":"Ab initio Calculations of the Thermoelectric Phonon Drag Effect in Semiconductor Nanostructures","authors":"Raja Sen, N. Vast, J. Sjakste","doi":"10.1109/cleo/europe-eqec57999.2023.10232794","DOIUrl":"https://doi.org/10.1109/cleo/europe-eqec57999.2023.10232794","url":null,"abstract":"With the advance of materials fabrication techniques and increase of computational power during the past two decades, the research aiming to enhance the efficiency of thermoelectric devices, with the search of new materials and manipulation of materials properties at the nanoscale, has attracted significant interest. In general, the efficiency of thermoelectric materials, measured by the figure of merit ZT, directly depends on the Seebeck coefficient of the material. In the present work, we have studied, by combining the density functional theory calculations of the electron-phonon [1], [2] and phonon-phonon [3] interactions, the enhancement of the Seebeck coefficient due to electron-phonon coupling, known as the “phonon-drag” effect [4]. To account for this effect, we have solved the linearized Boltzmann equation for electronic transport in presence of non-equilibrium phonon populations introduced by a temperature gradient [5]. In order to understand the phonon drag effect at the nanoscale, we have studied the effect of direction-dependent nano-structuring effect on the Seebeck coefficient of silicon. We will present our recent results related to phonon and/or impurity limited carrier mobility, as well as the variation of the Seebeck coefficient of bulk and nanostructured silicon with temperature and carrier concentrations. Our results for $n$-doped silicon not only show a good agreement with the experimental data in both bulk samples [6] and nanostructures [7] but also pave the way to further understand the contribution of phonon-drag in other semiconductor nanostructures [8], which still remain largely unexplored.","PeriodicalId":19477,"journal":{"name":"Oceans","volume":"69 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85143144","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}

引用次数: 0

Acceleration of Electrons from Krypton Gas Plasma Using THz Pulses 利用太赫兹脉冲加速氪气体等离子体中的电子

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10232102

Szabolcs Turnár, Balázs Róbert Sarkadi, Spencer W. Jolly, J. Hebling, Z. Tibai

引用次数: 0

All-Optical Steering of Light Upconversion by Nonlinear Metasurfaces Through Coherent Control 通过相干控制实现非线性超表面光上转换的全光转向

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10231761

A. Di Francescantonio, A. Zilli, D. Rocco, F. Conti, V. Vinel, A. Borne, M. Morassi, A. Lemaître, P. Biagioni, L. Duò, C. De Angelis, G. Leo, M. Finazzi, M. Celebrano

{"title":"All-Optical Steering of Light Upconversion by Nonlinear Metasurfaces Through Coherent Control","authors":"A. Di Francescantonio, A. Zilli, D. Rocco, F. Conti, V. Vinel, A. Borne, M. Morassi, A. Lemaître, P. Biagioni, L. Duò, C. De Angelis, G. Leo, M. Finazzi, M. Celebrano","doi":"10.1109/CLEO/Europe-EQEC57999.2023.10231761","DOIUrl":"https://doi.org/10.1109/CLEO/Europe-EQEC57999.2023.10231761","url":null,"abstract":"Frequency upconversion of near-infrared photons to the visible range is strategical for information technology, as it can provide an alternative for the read out of telecom signals using efficient silicon-based detectors. Light upconversion is a nonlinear process mediated by matter that consists in the interaction of either energy-degenerate photons, such as in second-harmonic and third-harmonic generation (THG), or photons with different energies, such as in sum frequency generation (SFG). We recently investigated frequency upconversion in both plasmonic and dielectric nanoantennas [1], [2]. Thanks to the adopted dual-beam pump scheme, where an ultrashort pulse ($omega$) at telecom wavelength ($lambda=1551 text{nm}$) impinges on the sample along with its frequency-doubled replica ($2 omega$), THG and SFG are degenerate in energy. This, along with coherence, enables the interference between the processes. Yet, we found that in individual nanoantennas symmetry plays a major role in enhancing/suppressing the interference between SFG and THG. By tuning the relative phase between the two impinging pulses, we performed all-optical switching of upconverted light with efficiency > 50% in asymmetric plasmonic antennas [2].","PeriodicalId":19477,"journal":{"name":"Oceans","volume":"23 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76720134","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}

引用次数: 0

Ground-Based Remote Sensing of CO2 in the Atmospheric Column Using a Portable Laser Heterodyne Radiometer with a Balanced Photodetector 利用带平衡光电探测器的便携式激光外差辐射计地面遥感大气中CO2

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10232594

Tingting Wei, Jingjing Wang, Fengjiao Shen, T. Tan, Z. Cao, Xiaoming Gao, P. Jeseck, Yao-Veng Te, Stéphane Plus, Lei Dong, Weidong Chen

{"title":"Ground-Based Remote Sensing of CO2 in the Atmospheric Column Using a Portable Laser Heterodyne Radiometer with a Balanced Photodetector","authors":"Tingting Wei, Jingjing Wang, Fengjiao Shen, T. Tan, Z. Cao, Xiaoming Gao, P. Jeseck, Yao-Veng Te, Stéphane Plus, Lei Dong, Weidong Chen","doi":"10.1109/CLEO/Europe-EQEC57999.2023.10232594","DOIUrl":"https://doi.org/10.1109/CLEO/Europe-EQEC57999.2023.10232594","url":null,"abstract":"Measurement of vertical concentration profiles of atmospheric trace gases is of great interest to understand the physics, chemistry, dynamics, and radiation budget of the atmosphere as well as to validate the results provided from chemical models and satellite observations. The laser heterodyne radiometer (LHR), as a passive remote sensing technique, was introduced and developed in 1970s to meet the needs of observing O3 hole in the atmosphere [1]–[3]. Since then, due to the lack of a suitable tunable laser source being used as a local oscillator (LO) for heterodyne measurement, LHR applications stayed almost in silence. Over the last decade, there has been a revival of the LHR technique as a result of significant advances in lasers and photonics technology [4]. Compared to the currently used Fourier transform spectrometer (FTS) for ground-based measurement of trace gases in the atmospheric column, the LHR offers unique advantages including high spectral resolution (<10−3 cm−1, determined by the selected electronic filter bandwidths), high sensitivity (within a factor of ~ 2 of the quantum noise limit), high spatial resolution owing to very small coherent field of view (FoV), and cost-effective compact instrumental dimension.","PeriodicalId":19477,"journal":{"name":"Oceans","volume":"356 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77156516","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}

引用次数: 0

Passive Mode-Locking of a Fiber Laser Using a V4C3MXene Based saturable Absorber at 1910 nm 基于V4C3MXene的1010nm饱和吸收器的光纤激光器被动锁模

Oceans Pub Date : 2023-06-26 DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10232214

Suh-young Kwon, Kyungtaek Lee, Taeho Woo, Janghyun Ryu, Junha Jung, Ju Han Lee

引用次数: 0

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