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Quantum Dot waveguide array for Broadband Light Sources

PHOTONICS 2025年第3期12卷 212-212页

作者： Li, Dongyang Chu, Yufei Xu, Qingbo Liu, Dong Ruan, Junying Sun, Hao Li, Jianwei Guo, Chengde Pu, Xiaoyun Zhang, Yuanxian Yunnan Univ Sch Phys & Astron Kunming 650500 Peoples R China SUNY Stony Brook Sch Marine & Atmospher Sci Stony Brook NY 11790 USA

In this paper, we demonstrate a broadband and simultaneous waveguide array light source based on water-soluble CdSe/ZnS quantum dots (QDs). We initially measure the fluorescence intensity for various cladding solution concentrations along the fiber axis to assess their impact on the propagation loss;the experimental results show that the fluorescent intensity decreases with fiber length, with higher concentrations showing a more pronounced decrease. Then, we showcase a synchronous QD light source in an optofluidic chip that fluoresces in red, green, and blue (RGB) within a microfluidic channel. Finally, a 3 x 3 QD array of a fluorescent display on a single PDMS chip is demonstrated. The QD waveguide represents a compact and stable structure that is readily manufacturable, making it an ideal light source for advancing high-throughput biochemical sensing and on-chip spectroscopic analysis.

关键词： quantum dots broadband light source waveguide array evanescent wave

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High-resolution waveguide array-based astronomical spectrograph with cascaded phase modulation

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CHINESE OPTICS LETTERS 2025年第3期23卷 031301-031301页

作者： Zhong, Yunxian Lin, Dong Xu, Biao Zhu, Zhuangzhuang Tong, Xue Zhong, Qing Feng, Jijun He, Jinping Chinese Acad Sci Nanjing Inst Astron Opt & Technol Lab Solar & Space Instruments Nanjing 210042 Peoples R China Chinese Acad Sci Nanjing Inst Astron Opt & Technol CAS Key Lab Astron Opt & Technol Nanjing 210042 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China Univ Chinese Acad Sci Nanjing 211135 Peoples R China Univ Shanghai Sci & Technol Engn Res Ctr Opt Instrument & Syst Sch Opt Elect & Comp EngnMinist Educ Shanghai Key Lab Modern Opt SystMinist Educ Shanghai 200093 Peoples R China

Integrated photonic spectrographs could provide a new generation of low-cost, highly integrated, high-performance optical terminal instruments for astronomical observations. However, these spectrographs still face the challenge of high spectral resolution. In this Letter, we demonstrate a cascaded phase-modulated waveguide array (CPMWA) spectrograph, with designed and measured spectral resolutions of 100,000 and 68,000, respectively. A spectral reconstruction method is proposed to minimize the influence of the phase error induced during the chip fabrication process and increase the spectral contrast to 20 dB. This type of spectrograph demonstrates promising potential for high-resolution spectrum observations in astronomy.

关键词： astronomical spectrograph waveguide array cascaded phase modulation high spectral resolution spectrum reconstruction

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waveguide array wavelength router design to improve insertion loss uniformity

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OPTICAL REVIEW 1997年第5期4卷 543-545页

作者： Okayama, H Kamijoh, T R&D Group Oki Electric Industry Co. Ltd. 550–5 Higashiasakawa Hachioji Tokyo 193 Japan

We propose a wavelength router design to improve insertion loss uniformity. Branched waveguides are placed at junctions between the waveguide array and a planar waveguide. The diffracted light injected into planar waveguides is forwarded in different directions. At the image plane of the planar waveguide, a flat top envelope is attained to ensure loss uniformity among output ports.

关键词： waveguide array wavelength router insertion loss

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Output mode characteristics of an in-phase locked gain waveguide array CO_2 laser

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Chinese Physics B 2011年第8期20卷 222-226页

作者：沙鹏飞辛建国周英刘正帆 School of Optoelectronics Beijing Institute of Technology

In this paper, experimental and theoretical studies of the output mode characteristics of an in-phase locked gain waveguide array CO2 laser are reported. The experimental results of the optical oscillation mode frequency, the far-field intensity distribution and the burnt pattern of the sliced waveguide array laser are obtained. A revised mode expression of the rectangle waveguide, which is suited for this waveguide array CO2 laser, is proposed. The theoretical simulation results based on the revised mode expression are shown to be in good agreement with the experimental results.

关键词： waveguide array phase coupling CO2 laser

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Simple estimation of strain distribution in narrow-stripe waveguide array fabricated by selective MOVPE

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JOURNAL OF CRYSTAL GROWTH 2007年第1期298卷 676-681页

作者： Yoshioka, Taichi Kawakita, Yasumasa Kawai, Akira Okawa, Tatsuya Shimomura, Kazuhiko Sophia Univ Dept Elect & Elect Engn Chiyoda Ku Tokyo 1028554 Japan

Low-pressure selective MOVPE has been performed to fabricate a GaInAs/InP MQW-based arrayed waveguide wavelength demultiplexer having, a linearly varying refractive-index distribution. By means of an asymmetric SiO2 mask with a wide mask section on one side of the array, waveguides of different thickness are fabricated on (100)-oriented n-InP substrates. In this report, desired characteristics of the waveguide array are obtained by a simple method for estimating strain in the GaInAs wells layer in an MQW waveguide from only the result of simple measurements: conventional X-ray diffraction (XRD), photoluminescence (PL) peak wavelength, and well layer thickness. (c) 2006 Elsevier B.V. All rights reserved.

关键词： metalorganic vapor phase epitaxy quantum wells selective epitaxy semiconducting indium compounds waveguide array

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Observation of Topological Transmission in Terahertz Domino waveguide array

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IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY 2023年第4期13卷 337-346页

作者： Hu, Pan Chen, Lin Shkurinov, Alexander Pavlovich Zhu, Yiming Zhuang, Songlin Univ Shanghai Sci & Technol Shanghai Key Lab Modern Opt Syst Shanghai 200093 Peoples R China Tongji Univ Shanghai Inst Intelligent Sci & Technol Shanghai 200092 Peoples R China Lomonosov Moscow State Univ Fac Phys Moscow 119991 Russia Lomonosov Moscow State Univ Int Laser Ctr Moscow 119991 Russia

In this article, we propose on-chip terahertz (THz) domino waveguide array structures that can enable the topological effect and enhance the robustness of THz transmission. THz topological effect (include topologically protected edge states and binding states) is excited by constructing kink and antikink structures in designed domino waveguide arrays. Furthermore, the robustness of topological waveguide arrays is successfully demonstrated. The topological transmission effects have been experimentally demonstrated using scanning near-field THz microscopy. Our study provides a new approach to study the topological photonic transport of waveguide arrays in the THz regime and has potential application in THz-integrated circuit.

关键词： Domino plasmons terahertz (THz) topological photonics waveguide array

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Effect of loss on transverse localization of light in 1D optical waveguide array in the presence of Kerr-type nonlinearity

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OPTICAL AND QUANTUM ELECTRONICS 2020年第1期52卷 4-4页

作者： Nezhad, M. Khazaei Mirshamsi, D. Zarif, F. Asadollah Rezaeiun, H. Rastegar Moghaddam Ferdowsi Univ Mashhad Dept Phys Fac Sci Mashhad Razavi Khorasan Iran

In this paper we have comprehensive study on the interplay among radiation loss, transverse disorder (diagonal and off-diagonal) and Kerr-type nonlinearity on the light propagation in 1D array of optical waveguides. Our numerical results demonstrate the presence of three distinguished regimes of transverse light expansion at different propagation distances. At short propagation distance, the Kerr-type nonlinearity are dominated and results in the transverse localization of light through the self-trapping mechanism. Radiation loss, causes the light escape from the injected guides, affect the light expansion in middle distance via broadening the light beam width. At longer distance the disorder terms led to the transverse localization of light, again. Also, we compared the propagation of light in edge and middle modes in the presence of the above effects. Our results show that the propagation distance of first localized regime for edge modes is larger than the middle modes since the edge modes can exchange energy with one of the left or right waveguides, while for middle modes there are two ways for energy exchange. Therefore the discrete diffraction can be diminished the nonlinear effects in middle modes faster than the edge modes.

关键词： Diagonal and off-diagonal disorder Radiation loss Kerr-type nonlinearity Edge and middle modes waveguide array

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Electromagnetic transmission of an oblique waveguide array

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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2004年第10期52卷 2596-2602页

作者： Kwon, JY Eom, HJ LG Elect Inst Technol Devices & Mat Lab Seoul 137724 South Korea Korea Adv Inst Sci & Technol Dept Elect Engn Taejon 305701 South Korea

Transverse magnetic (TM) and transverse electric (TE) wave transmissions of an oblique parallel-plate waveguide array is studied. The scattered wave is represented in terms of continuous and discrete modes based on the Fourier transform and series, respectively. The tangential field continuities at the boundary are enforced to obtain simultaneous equations for the discrete modal coefficients. Residue calculus is utilized to transform the radiation field and reflection coefficient into numerically efficient forms. Numerical computations are performed to illustrate the behavior of wave radiation and reception by an oblique waveguide array.

关键词： Fourier transform mode matching waveguide array

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Analysis of a Traveling-Wave waveguide array With Narrow-Wall Slots Using Higher Order Basis Functions in Method of Moments

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IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2009年 8卷 1390-1393页

作者： Zhao, Xun-Wang Zhang, Yu Sarkar, Tapan K. Ting, Sio-Weng Liang, Chang-Hong Xidian Univ Sch Elect Engn Xian 710071 Shaanxi Peoples R China Syracuse Univ Dept Elect Engn & Comp Sci Syracuse NY 13244 USA

The radiation pattern of a traveling-wave waveguide array with narrow-wall slots is analyzed accurately using higher order basis functions (HOBs) in the context of method of moments (MoM). The use of HOBs can significantly reduce the number of unknowns in MoM compared to the use of piece-wise Rao-Wilton-Glisson basis functions (RWGs). To prevent the formation of a secondary beam due to reflected waves originating from the terminations of the waveguides, the concept of the perfectly matched layer (PML) in differential-equation methods is introduced to design the matched loads terminating the waveguides. In the analysis, the MoM with HOBs is applied to the electric field integral equation (EFIE) with the free-space Green's function. The simulated data is compared to the RWG-function and experimental results to validate the HOB-function analysis.

关键词： Higher order basis functions (HOBs) method of moments (MoM) perfectly matched layer (PML) radiation pattern waveguide array

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PARAMETRIC STUDY OF waveguide SLOTS AND ANALYSIS OF RADIATION PATTERN FOR THE DESIGN OF waveguide array ANTENNA

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PROGRESS IN ELECTROMAGNETICS RESEARCH M 2008年 4卷 93-103页

作者： Mondal, M. Chakrabarty, A. IIT KGP Dept E&ECE Kalpana Chwala Space Technol Cell Kharagpur 2 W Bengal India IIT Kharagpur Elect Elect Commun Engn Kharagpur W Bengal India

The characteristics of radiating longitudinal slots in a rectangular waveguide have been studied. A moment method solution is used with entire basis expansion and testing functions (Galerkin) including the effect of wall thickness. It is shown in this paper. 1) The determination of different parameters like VSWR, reflection coefficients and insertion loss are calculated with the results of normalize reactance and conductance. 2) The Taylor distribution approach with specific SLL for desired linear aperture array antenna. The resonant conductance or resistances are calculated from desired amplitude distribution. The formulation uses transmission matrix approach. The computed result shows excellent agreement with measured results. CST Microwave studio is used for the simulation and is totally based on FIT techniques.

关键词： .shunt RADIATION PATTERN longitudinal slots waveguide array desired amplitude

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