Opto-Electronics Review最新文献_第10页

Reduction of Ge-on-Si waveguide propagation loss by laser and hydrogen annealing 用激光和氢退火降低锗硅波导的传输损耗

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2649846

L. W. Lim, A. Fong, Rachel Ang, Roth Qin Gui Voo, Justin Nian Hong Teh, Md Hazwani Khairy Md Husni, H. Cai, L. Tobing, Nanxi Li, Surasit Chung, L. Lee

{"title":"Reduction of Ge-on-Si waveguide propagation loss by laser and hydrogen annealing","authors":"L. W. Lim, A. Fong, Rachel Ang, Roth Qin Gui Voo, Justin Nian Hong Teh, Md Hazwani Khairy Md Husni, H. Cai, L. Tobing, Nanxi Li, Surasit Chung, L. Lee","doi":"10.1117/12.2649846","DOIUrl":"https://doi.org/10.1117/12.2649846","url":null,"abstract":"Germanium-on-Silicon (Ge-on-Si) platform has been demonstrated as an excellent candidate for mid-infrared photonics applications, including on-chip mid-infrared spectroscopy and biochemical sensing. However, this platform is often saddled by high propagation loss due to a combination of threading dislocation defects at the Ge/Si interface, absorption in the silicon for λ < 8 μm, and surface scattering due to sidewall roughness. This work investigates the effects on loss reduction through different annealing techniques on Ge-on-Si waveguides fabricated using CMOS-compatible processes. We explore the use of local laser annealing at waveguide sidewalls, whereby the fluence was varied. A non-local annealing technique in hydrogen ambient was also employed as comparison. The propagation losses for wavelengths, ranging from λ = 5 μm to λ = 11 μm, were systematically characterized by fabricating waveguide and grating coupler structures on the same chip. Cutback measurements were performed by varying the waveguide length (of the same width) from L = 1 mm to L = 4 mm. Both hydrogen and laser annealing experiments show marked reduction in the propagation loss, by up to 27% and 46% respectively. This finding paves the way for post-processing techniques to reduce propagation loss in Ge-on-Si platform, which will enable various on-chip mid-IR applications in the future.","PeriodicalId":54670,"journal":{"name":"Opto-Electronics Review","volume":"72 1","pages":"1242414 - 1242414-5"},"PeriodicalIF":1.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74300990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fresnel zone plate metalens using silicon subwavelength gratings 采用硅亚波长光栅的菲涅耳带板超透镜

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2650701

W. Fraser, W. Ye

引用次数: 0

Measurement of the out-of-plane optical constants of a two-dimensional crystal 二维晶体面外光学常数的测量

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2651652

M. Merano

引用次数: 0

Mid infrared polarization independent tapered waveguide based multianalyte sensor- a theoretical study 基于中红外偏振无关锥形波导的多分析物传感器的理论研究

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2648967

Arpita Mishra, K. Rana, Preetam Kumar, T. Srinivas

{"title":"Mid infrared polarization independent tapered waveguide based multianalyte sensor- a theoretical study","authors":"Arpita Mishra, K. Rana, Preetam Kumar, T. Srinivas","doi":"10.1117/12.2648967","DOIUrl":"https://doi.org/10.1117/12.2648967","url":null,"abstract":"Group-IV photonics has gained a lot of interest in recent years due to its CMOS compatibility. Silicon on Insulator (SOI) has dominated the optical and optoelectronics field for past decades. On the other hand Germanium based platform, GeOI is another promising candidate for the above mentioned field.1 It has wide application in Mid Infrared Sensing due to it’s abundance, transparency and high index contrast (Δn = 2.6 at 3 μm) with reference to silicon on insulator. In order to take the advantage of wide transparency of Germanium in the Mid Infrared applications like chemical sensing, where most hazardous chemical molecules have their fingerprints, we have designed a compact adiabatic tapered waveguide2-4 sensor based on evanescent wave coupling which will be able to sense more than six analytes (Carbon dioxide (CO2), Nitrous oxide (N2O), Nitrogen dioxide (NO2), Nitric oxide (NO), Ammonia (NH3), Ethylene (C2H4), Acetylene (C2H2), Hydrogen Cyanide (HCN) and Methane (CH4)) having absorption peaks in between 2.5 to 3.5 μm. The proposed device provide a suitable method for label-free detection of target molecules and can be integrated on-chip for industrial and environmental monitoring , health analysis and food processing which can be leveraged over hefty conventional spectrometer like Fourier Transform Infrared Spectroscopy (FTIR). We have also studied and found an optimum tapered length of 40 μm for the proposed geometry, having more than 80 % transmission for both fundamental Transverse Electric (TE) and Transverse Magnetic (TM) mode making it polarisation insensitive.","PeriodicalId":54670,"journal":{"name":"Opto-Electronics Review","volume":"430 1","pages":"124241N - 124241N-4"},"PeriodicalIF":1.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77803648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prediction of medium chemical concentration with micro-ring resonators and deep learning 基于微环谐振器和深度学习的介质化学浓度预测

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2655968

Thomas J. Mikhail, Raghi S. El Shami, M. Swillam, Xun Li

{"title":"Prediction of medium chemical concentration with micro-ring resonators and deep learning","authors":"Thomas J. Mikhail, Raghi S. El Shami, M. Swillam, Xun Li","doi":"10.1117/12.2655968","DOIUrl":"https://doi.org/10.1117/12.2655968","url":null,"abstract":"A new approach for determining the concentration composition of a multi-element media using a micro-ring resonator (MRR) is proposed which allows for noise removal as well as moderately higher average accuracy. This method uses two neural networks, namely a convolutional neural network (CNN) and a deep neural network (DNN). The CNN differentiates the transmission spectrum from the noise. This spectrum is used to obtain selected features before being fed into the DNN, which determines the concentration of each chemical in the analyte. Both models are trained to work with a silicon on-insulator ring resonator operating between the infrared wavelengths of λ=1.46 μm to λ=1.6μm on mixtures of water, ethanol, methanol, and propanol by using simulation data obtained from finite difference eigenmode, although the same approach can be used with other designs and chemical combinations. The CNN was trained using the MRR transmission spectra superimposed with white Gaussian noise as well as Poisson noise to mimic various noise sources, while the DNN underwent training on the extracted features. Average Root-Mean-Square Error was for a range of concentrations from 0.0357-75% is 5.531%.","PeriodicalId":54670,"journal":{"name":"Opto-Electronics Review","volume":"18 1","pages":"124250D - 124250D-4"},"PeriodicalIF":1.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83705023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Organic-on-silicon photonic platform for advanced imagers, microdisplays and sensors 用于先进成像仪、微显示器和传感器的有机硅光子平台

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2648357

P. Wartenberg, B. Richter, Stephan Brenner, Judith Baumgarten, Simone Lenk, K. Fehse, D. Schlebusch, M. Törker, Andreas Fritscher, Johannes Zeltner, Christian Schmidt, Martin Rolle, Steffen Damnik, Josephine Mütze, Florian Schuster, U. Vogel

引用次数: 2

On-chip silicon nitride optical phased array as a broadband near-infrared spectrometer 片上氮化硅光学相控阵作为宽带近红外光谱仪

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2647270

Zuyang Liu, N. Le Thomas, R. Baets

引用次数: 0

Light emission and engineered carrier lifetime in strained 2D materials towards developing wavelength-tunable integrated emitters 应变二维材料的光发射和工程载流子寿命，以发展波长可调集成发射器

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2650116

Wen-wei Lee, Yi Yu, Yong Hao Tham, Pratul Venkatesh, Jianfeng Tan, Bongkwon Son, Manlin Luo, K. Lu, Yadong Wang, D. Nam

引用次数: 0

Towards compact fire infrared radiance spectral tracker (c-FIRST) 面向紧凑型火焰红外辐射光谱跟踪器(c-FIRST)

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2659034

S. Gunapala, D. Ting, William Johnson, A. Soibel, P. Ramsey, O. Kalashnikova, M. Garay, A. Davies, Yuki Maruyama, Jessica Fisher, A. Sood, J. Zeller, Christopher L. David, S. Babu, P. Ghuman

{"title":"Towards compact fire infrared radiance spectral tracker (c-FIRST)","authors":"S. Gunapala, D. Ting, William Johnson, A. Soibel, P. Ramsey, O. Kalashnikova, M. Garay, A. Davies, Yuki Maruyama, Jessica Fisher, A. Sood, J. Zeller, Christopher L. David, S. Babu, P. Ghuman","doi":"10.1117/12.2659034","DOIUrl":"https://doi.org/10.1117/12.2659034","url":null,"abstract":"In this presentation we will describe the technologies developed at the Jet Propulsion Laboratory for space remote sensing applications in mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) spectral regions. Remote sensing and characterization of high temperature targets on the Earth’s surface is required for many cross-disciplinary science investigations and applications including fire and volcano impacts on ecology, the carbon cycle, and atmospheric composition. For decades this research has been hindered by insufficient spatial resolution and/or detector saturation of satellite sensors operating at short and mid-infrared wavelengths (1-5μm) where the spectral radiance from high temperature (<800 K) surfaces is most significant. To address this critical need, the Jet Propulsion Laboratory and partnering institutions are developing a compact modular high dynamic range (HDR) multispectral imager concept, with the flexibility to operate in the short, mid- or long-wavelength infrared spectral bands.","PeriodicalId":54670,"journal":{"name":"Opto-Electronics Review","volume":"14 1","pages":"1242509 - 1242509-11"},"PeriodicalIF":1.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77163319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hybrid lithium niobate-on-silicon nitride platform for mid-IR supercontinuum generation 中红外超连续谱生成的铌酸锂-氮化硅混合平台

IF 1.6 4区工程技术

Opto-Electronics Review Pub Date : 2023-03-17 DOI: 10.1117/12.2649971

C. Lafforgue, M. Churaev, T. Kippenberg, C. Brès

{"title":"Hybrid lithium niobate-on-silicon nitride platform for mid-IR supercontinuum generation","authors":"C. Lafforgue, M. Churaev, T. Kippenberg, C. Brès","doi":"10.1117/12.2649971","DOIUrl":"https://doi.org/10.1117/12.2649971","url":null,"abstract":"Integrated optics has shown itself very convenient for exploiting nonlinear processes as it results in high confinement factor, freedom of dispersion engineering and compactness. However, the choice of materials is crucial for the development of nonlinear systems. Ideally, one looks for a platform that offers high second and/or third order nonlinearities, low loss and ease of fabrication. Silicon nitride (Si3N4) is now proven to be a good platform for frequency conversion based on third order nonlinearity. Supercontinuum generation (SCG) was obtained in the near-IR and mid-IR regions by pumping waveguides with common fiber lasers. It resulted in broadband coherent combs extending in the mid-IR thanks to dispersive wave generation. Yet, Si3N4 does not exhibit any second order nonlinearity desirable for comb self-referencing via second-harmonic generation (SHG). On the other hand, lithium niobate (LiNbO3) is widely used in integrated photonics for second order nonlinear processes. In our work, we exploit a hybrid Si3N4-LiNbO3 photonic integrated platform that combines maturity and dispersion engineering capabilities of Si3N4 integrated photonics with second-order nonlinear properties of LiNbO3 bypassing challenging lithium niobate etching. We study numerically and experimentally the potential of SCG and SHG for frequency comb self-referencing on this platform when pumping with a fiber laser operating at 2 μm for mid-IR operation, a window useful for sensing as it contains many molecular signatures.","PeriodicalId":54670,"journal":{"name":"Opto-Electronics Review","volume":"43 1","pages":"124240M - 124240M-4"},"PeriodicalIF":1.6,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86117681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0