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AIP Conference Proceedings [AIP Publishing 15th International Conference on Concentrator Photovoltaic Systems (CPV-15) - Fes, Morocco (25–27 March 2019)] 15th International Conference on Concentrator Photovoltaic Systems (CPV-15) - Multilayer optical routing by means of vertical directional coupler with long range surface plasmons
摘要： We show that e?cient multilayer optical routing is achievable with long range surface plasmon polaritons (LR-SPP) through an accurate design of vertical directional couplers (VDC). Our theoretical results suggest that by suitably tuning some geometrical parameters, in particular the path length and bend radius, it is possible to obtain a good control on the overall interaction, even in presence of fabrication non-idealities. We present a top-down fabrication process ?ow for LR-SPP multilayer optical circuits, obtained by stacking multiple ultrathin nanometric metal ?lms within a polymeric dielectric background; the overall structure has a good degree of mechanical stability. By pro?ting from the topological advantage given by VDCs, as one of the useful applications of our work, we propose a new optical integrated circuit architecture scheme, capable of connecting two separate circuit paths without in?uencing the geometry or signi?cantly promoting crosstalk with any other path in the middle. The possibility to develop vertically stacked optical integrated circuits upon electronic integrated circuits makes LR-SPPs a good technology for the production of inexpensive and high-density network systems.
关键词： optical integrated circuits,long range surface plasmons,multilayer optical routing,vertical directional coupler
更新于2025-09-12 10:27:22
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Characterization of Waveguide Photonic Crystal Reflectors on Indium Phosphide Membranes
摘要： We present waveguide photonic crystal re?ectors on the InP-membrane-on-silicon (IMOS) platform, and a method to accurately measure the re?ectivity of those re?ectors. The photonic crystal holes are patterned on a waveguide using electron-beam lithography and etched through the waveguiding layer to create a broadband distributed Bragg re?ector. We show simulations of these re?ectors and experimental results of fabricated devices, both showing a high, free-to-choose re?ectivity, and high quality factor Fabry-P′erot cavities. We experimentally show re?ectivities higher than 95% for the re?ectors and a quality factor as high as 15,911±511 for a Fabry-P′erot cavity, using re?ectors with a length of only 4 microns. For the ?rst time, to our knowledge, two methods for measuring the re?ectivity are used for characterization of on-chip re?ectors to accurately determine the re?ection. The ?rst method is based on analysis of the transmission through a Fabry-P′erot cavity, the second is based on a direct four-port measurement of the re?ector. A systematic error is made in both methods, resulting in an upper and lower boundary for the actual re?ection coef?cient.
关键词： photonic crystals,nanophotonics,Photonic integrated circuits
更新于2025-09-12 10:27:22
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III-V-on-Si photonic integrated circuits realized using micro-transfer-printing
摘要： Silicon photonics (SiPh) enables compact photonic integrated circuits (PICs), showing superior performance for a wide variety of applications. Various optical functions have been demonstrated on this platform that allows for complex and powerful PICs. Nevertheless, laser source integration technologies are not yet as mature, hampering the further cost reduction of the eventual Si photonic systems-on-chip and impeding the expansion of this platform to a broader range of applications. Here, we discuss a promising technology, micro-transfer-printing (μTP), for the realization of III-V-on-Si PICs. By employing a polydimethylsiloxane elastomeric stamp, the integration of III-V devices can be realized in a massively parallel manner on a wafer without substantial modifications to the SiPh process flow, leading to a significant cost reduction of the resulting III-V-on-Si PICs. This paper summarizes some of the recent developments in the use of μTP technology for realizing the integration of III-V photodiodes and lasers on Si PICs.
关键词： micro-transfer-printing,Silicon photonics,III-V-on-Si,photonic integrated circuits,laser integration
更新于2025-09-12 10:27:22
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A Comparison between Off and On-Chip Injection Locking in a Photonic Integrated Circuit
摘要： The mutual and injection locking characteristics of two integrated lasers are compared, both on and off-chip. In this study, two integrated single facet slotted Fabry–Pérot lasers are utilised to develop the measurement technique used to examine the different operational regimes arising from optically locking a semiconductor diode laser. The technique employed used an optical spectrum analyser (OSA), an electrical spectrum analyser (ESA) and a high speed oscilloscope (HSO). The wavelengths of the lasers are measured on the OSA and the selected optical mode for locking is identi?ed. The region of injection locking and various other regions of dynamical behaviour between the lasers are observed on the ESA. The time trace information of the system is obtained from the HSO and performing the FFT (Fast Fourier Transform) of the time traces returns the power spectra. Using these tools, the similarities and differences between off-chip injection locking with an isolator, and on-chip mutual locking are examined.
关键词： photonic integrated circuits,semiconductor lasers,injection locking,mutual coupling
更新于2025-09-12 10:27:22
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Simulations of Nanoscale Room-Temperature Waveguide-Coupled Single-Photon Avalanche Detectors for Silicon-Photonic Sensing and Quantum Applications
摘要： Photonic qubits can represent an ideal choice in quantum-information science since photons travel at the speed of light and interact weakly with the environment over long distances. In this context, technological platforms allowing the development and implementation of chip-scale integrated-photonics represent a possible solution towards scalable quantum networking schemes. However, at present, most examples of integrated quantum photonics still require the coupling of light to external photodetectors operating at very low temperatures. In this paper, we demonstrate that the GeSn/Si-in-SOI technological platform can be a good candidate to realize integrated single-photon avalanche detectors (SPADs), operating at room temperature. Thus, we report the design and simulation of waveguide-based SPADs for operation at 1550 nm and 2000 nm wavelengths. We calculate the breakdown voltage, the dark count rate (DCR), the single photon detection efficiency (SPDE), the noise equivalent power (NEP), the dark count and the afterpulsing probabilities by simulating the avalanche process and the statistical features in a self-consistent way. The PIPIN SPAD performance parameters are estimated as a function of the GeSn’s threading dislocation density and of the temperature. We also demonstrate that for operation at 1550 nm and 2000 nm wavelengths with the 220-nm GeSn separate-absorber film centered in the 250-nm-high Si waveguide end, it is possible cover a number of applications at room or near room temperature, ranging from ultra-sensitive LIDAR to quantum communications, metrology, sensing and key distribution.
关键词： Optoelectronic and Photonic device,Photonic integrated circuits,Silicon Photonics,Photodetector,Avalanche photodiode
更新于2025-09-12 10:27:22
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Integrated RF Passive Low Pass Filters in Silicon Photonics
摘要： The integration of passive radio frequency (RF) components, such as resistors, capacitors, and inductors, requires a relatively large area on complementary metal oxide semiconductor (CMOS) chips, which is not cost-effective in developing optical receiver front-ends. This could be addressed by implementing passive RF components on silicon photonics chips. In this work, we present an on-chip passive RF low-pass filter coupled to an integrated photodetector. This study demonstrates that passive RF analog processing can be implemented in a commercial silicon photonics platform. The performance of the implemented RC filters is reported at frequencies up to 15 GHz.
关键词： low pass filters,photonic integrated circuits,silicon photonics,CMOS integrated circuits,passive RF circuits
更新于2025-09-11 14:15:04
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Programmable Integrated Silicon Photonics Waveguide Meshes: Optimized designs and control algorithms
摘要： Programmable Integrated Photonics is a recent area of research that aims to integrate a very-large scale of reconfigurable photonic components to enable flexible and versatile photonic integrated circuits. In this paper we review the state of the art of general-purpose waveguide mesh arrangements with a special focus on those that allow the synthesis of optical feedback loops. Moreover, we propose for the first time, a new design approach to generate waveguide mesh patterns with equally-oriented components. This innovation is of special relevance to improve performance and to mitigate one of the main scalability limitations, the integration density. The paper finalizes with an introduction to control algorithms for waveguide mesh arrangements based on derivative methods and non-derivative methods. These control methods provide a proof for the self-reconfiguration of large-scale waveguide mesh arrangements. In particular, we apply the computational optimization algorithms to program a hexagonal waveguide mesh to emulate a 1x8 beamforming network and an optical filter based on an unbalanced MZI design. All in all, the paper comprises recipes to achieve truly practical software-defined photonic integrated circuits.
关键词： reconfigurable circuits,signal processing,programmable photonics,integrated circuits,control algorithms
更新于2025-09-11 14:15:04
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MEMS-enabled Silicon Photonic Integrated Devices and Circuits
摘要： Photonic integrated circuits have seen a dramatic increase in complexity over the past decades. This development has been spurred by recent applications in datacenter communications and enabled by the availability of standardized mature technology platforms. Mechanical movement of wave-guiding structures at the micro- and nanoscale provides unique opportunities to further enhance functionality and to reduce power consumption in photonic integrated circuits. We here demonstrate integration of MEMS-enabled components in a simplified silicon photonics process based on IMEC’s Standard iSiPP50G Silicon Photonics Platform and a custom release process.
关键词： Microelectromechanical Systems,Photonic Integrated Circuits,Nanophotonics,Integrated Optics,Silicon Photonics
更新于2025-09-11 14:15:04
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[OSA CLEO: Applications and Technology - San Jose, California (2015..-..)] CLEO: 2015 - 56 Gb/s WDM transmitter module based on silicon microrings using comb lasers
摘要： We demonstrate the performance and the reliable fabrication process of a 56 Gb/s wavelength-division multiplexing transmitter module with integrated feedback structures. The device is based on microring silicon depletion modulators, optimized for O-band comb-laser operation.
关键词： Photonic integrated circuits,Modulators,Integrated optics devices
更新于2025-09-11 14:15:04
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III-V-on-Silicon Integration: From Hybrid Devices to Heterogeneous Photonic Integrated Circuits
摘要： Heterogeneous integration of III-V materials onto silicon photonics has experienced enormous progress in the last few years, setting the groundwork for the implementation of complex on-chip optical systems that go beyond single device performance. Recent advances on the field are expected to impact the next generation of optical communications to attain low power, high efficiency and portable solutions. To accomplish this aim, intense research on hybrid lasers, modulators and photodetectors is being done to implement optical modules and photonic integrated networks with specifications that match the market demands. Similarly, important advances on packaging and thermal management of hybrid photonic integrated circuits (PICs) are currently in progress. In this paper, we report our latest results on hybrid III-V on Si transmitters, receivers and packaged optical modules for high-speed optical communications. In addition, a review of recent advances in this field will be provided for benchmarking purposes.
关键词： III-V on SOI photonic integrated circuits,on-chip silicon transmitters and receivers,lasers,thermal management,silicon photonics packaging
更新于2025-09-11 14:15:04