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Acousto-Optic Modulation of a Microring Resonator on Thin-Film AlScN photonic Platform

IEEE photonics Technology Letters 2025年第16期37卷 917-920页

作者： Bian, Kewei Liu, Yushuai Rong, Weilin Dong, Yuan Zhong, Qize Qiu, Yang Zhao, Xingyan Wu, Tao Zheng, Shaonan Hu, Ting Shanghai University School of Microelectronics Shanghai201800 China ShanghaiTech University School of Information Science and Technology Shanghai201210 China Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Chinese Academy of Sciences Beijing100049 China

Acousto-optic (AO) modulation is critical for microwave and optical signal processing, computing and networking. This work presents the first demonstration of an AO modulator exploiting a microring resonator (MRR) based on thin-film aluminum scandium nitride (AlScN) photonic platform. Leveraging the high piezoelectric properties of AlScN, an MRR is employed with interdigital transducer (IDT) inside to couple microwave signals into acoustic resonant modes, enabling by-directional optical modulation in the MRR. The fabricated MRR exhibits an optical quality factor (Q) of 1.8 x104 at the optical L-band for the TE00 mode. A low effective half-wave voltage (vΠ) of 1.21 v is achieved, corresponding to a vΠL of 0.0242 v·cm, along with an optomechanical single-photon coupling strength g0 of 0.43 kHz between the 2.11GHz acoustic mode and the TE00 optical mode. The device shows potential for applications in microwave photonics. © 1989-2012 IEEE.

关键词： Light modulation

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Ultrafast laser drilling of through vias in Sodalime glass using GHz-burst mode operation

Ultrafast laser drilling of through vias in Sodalime glass u...

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conference on Laser plus photonics for Advanced Manufacturing

作者： Balage, Pierre Lopez, John Lafargue, Manon Guilberteau, Theo Bonamis, Guillaume Honninger, Clemens Manek-Honninger, Inka Univ Bordeaux CELIA UMR5107 CNRS CEA F-33405 Talence France Amplitude Cite Photon 11 Ave Canteranne F-33600 Pessac France ALPhANOV Rue Francois Mitterrand F-33400 Talence France

ISBN: (纸本)9781510673298;9781510673281

In this contribution we show through via drillings in dielectrics by ultrafast laser top-down percussion drilling in GHz-burst mode. We point out some limitations that occur during the drilling process and show how to overcome these. Finally, we obtained through vias of almost constant diameter in Sodalime glass, which might be of interest in the microelectronics industry for the fabrication of glass interposers.

关键词： ultrafast laser processing GHz-bursts femtosecond pulses glass through glass via (TGv)

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Enhanced Physical-Layer Security in visible Light Communications - A Joint Waveform Approach

Enhanced Physical-Layer Security in Visible Light Communicat...

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Annual conference of the IEEE-photonics-Society (IPC)

作者： Mietzner, Jan Lampe, Lutz Schober, Robert Hamburg Univ Appl Sci HAW Fac Design Media & Informat D-22081 Hamburg Germany Univ British Columbia Dept Elect & Comp Engn Vancouver BC V6T 1Z4 Canada Friedrich Alexander Univ Erlangen Nurnberg FAU Inst Digital Commun D-91058 Erlangen Germany

We propose a joint waveform design for enhanced physical-layer security in visible-light communication systems using (massive) light-emitting-diode arrays suitable for sensing the presence of an illegitimate intruder ... 详细信息

ISBN: (纸本)9798350347227

关键词： visible light communication physical-layer security spatial signal processing waveform design sensing jamming

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Smart photons from Microplasma-based Uv Devices: New Opportunities in the microelectronics, Health Care, and Micro/Nano processing 50

Smart Photons from Microplasma-based UV Devices: New Opportu...

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50th IEEE International conference on Plasma Science, ICOPS 2023

作者： Park, S.-J. Eden, J.G. University of Illinois at Urbana-Champaign Department of Electrical and Computer Engineering UrbanaIL United States Eden Park Illumination Inc. ChampaignIL United States

ISBN: (纸本)9798350302660

Low-temperature microplasmas are efficient sources of ions, electrons, active species, and photons. In particular, photon generation of microcavity plasma arrays offers differentiated performance in various photonics applications that were previously unavailable. In this paper, we will discuss recent developments in microplasma photonics in three areas. © 2023 IEEE.

关键词： photons

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Reconfigurable time-space photonic integrated convolutional accelerator 5

Reconfigurable time-space photonic integrated convolutional ...

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conference on AI and Optical Data Sciences v

作者： Jonuzi, Tigers Lupo, Alessandro Talandier, Lucas Goldmann, Mirko Fischer, Ingo Argyris, Apostolos Massar, Serge Soriano, Miguel C. Domenech Gomez, J. David VLC Photon SL C Camino Vera S-N Valencia 46022 Spain Univ Libre Bruxelles Lab Informat Quant Ave Roosevelt 50 B-1050 Brussels Belgium Campus Univ Illes Balears Inst Fis Interdisciplinar & Sistema Complejos IFISC UIB CSIC E-07122 Palma De Mallorca Spain

ISBN: (纸本)9781510670679;9781510670662

Convolutional Neural Networks (CNNs) are employed in a plethora of fields, including computer vision, natural language processing, and speech recognition. We present an integrated photonic accelerator for CNNs based on the temporal-spatial interleaving of signals. This architecture supports 1D kernels, and can be extende to 2D convolutional kernels, providing scalability for complex networks. A supervised on-chip learning algorithm is employed to guarantee a reliable setting of convolutional weights against fabrication tolerances, thermal cross-talks, and changes in operating conditions. Overall, by leveraging photonics technology, the proposed accelerator significantly reduces hardware complexity while enabling high-speed processing and parallelism.

关键词： Integrated photonics Convolutional Neural Network Hardware Accelerator

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A scalable integrated photonics tensor core for large vector-matrix multiplications 5

A scalable integrated photonics tensor core for large vector...

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conference on AI and Optical Data Sciences v

作者： Peinke, Emanuel Lacasse, Thomas Najeeb, Najla Masnad, Md Mahadi Fouda, Mohamed Peter, Yves-Alain Liboiron-Ladouceur, Odile 3E8 Inc 780 Ave Brewster Montreal PQ H4C 2K1 Canada Polytech Montreal Microphoton Lab Engn Phys 2500 Chemin Polytech Montreal PQ H3T 1J4 Canada McGill Univ Photon DataCom Team Elect & Comp Engn McConnell Engn Bldg3480 Univ St Montreal PQ H3A 0E9 Canada

ISBN: (纸本)9781510670679;9781510670662

Optical computing promises to play a major role in hardware chips dedicated to artificial intelligence (AI). Digital electronics, when employed in computing hardware, face the sunset of Moore's law and the acknowledged end of Dennard scaling (energy density of shrinking transistors). In response to these limitations, a paradigm shift towards non-digital processing is on the horizon. In optical computing devices for AI, the dominant mathematical operation is vector-matrix multiplication. It is typically limited to small vector and matrix sizes. Most approaches do not allow for significant scaling. In this context, our work focuses on the development of a silicon photonics tensor core that exhibits a unique scalability feature, enabling effective expansion to accommodate large matrix sizes. This scalability is deemed essential for the realization of meaningful AI accelerator products leveraging photonic hardware.

关键词： optics computing silicon photonics AI analog computing

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Metamaterial-engineered fiber-chip couplers in silicon and silicon nitride waveguides 20

Metamaterial-engineered fiber-chip couplers in silicon and s...

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2025 conference on Silicon photonics

作者： Benedikovic, Daniel Fraser, William Korcek, Radovan Sahli, Sarra Xin, Xiaochen Medina, David Dominguez-Bucio, Thalia Gardes, Frederic Petrovic, Adam Pikulikova, viktoria Sajban, Matej Wilmart, Quentin Edmond, Samson Litvik, Jan Glesk, Ivan Cheben, Pavel Schimd, Jens H. Melati, Daniele vivien, Laurent Alonso-Ramos, Carlos Ye, Winnie N. Univ Zilina Fac Elect Engn & Informat Technol Zilina Slovakia Carleton Univ Dept Elect Ottawa ON Canada Nat Res Council Canada Ottawa ON Canada Univ Paris Saclay CNRS Ctr Nanosci & Nanotechnol Palaiseau France Univ Southampton Optoelect Res Ctr Southampton Hants England CEA LETI Grenoble France

ISBN: (纸本)9781510684904;9781510684911

Integrated photonics has become a mainstream technology driven by advances in optical communications and leveraging mature processing infrastructure of silicon microelectronics. In practical applications of photonic integrated circuits (PICs), the presence of low-loss off-chip optical coupling interfaces is of key importance. photonic chips require optical connection to the external world, facilitating both multi-channel fiber connections and free-space multi-port optics. Optical coupling in and out of the planar waveguide circuits is still a critical challenge in integrated photonics due to limitations caused by geometrical, material, and modal mismatches. The utilization of subwavelength grating (SWG) metamaterials, i.e. nano-structured waveguide segments with structural periodicity smaller than the wavelength of the propagating light, is often harnessed as an effective design tool to improve the performance of fiber-chip optical couplers, without compromising the fabrication simplicity. In this work, we present recent advances in the development of low-loss photonic chip interfaces based on surface grating couplers with SWG metamaterials. In particular, we report on advanced design solutions of surface gratings realized on silicon and silicon nitride waveguide platforms, facilitating effective control of polarization and enhanced fiber-chip coupling performance with losses down to -1 dB.

关键词： Optical interfaces Integrated photonics Subwavelength gratings Metamaterials Surface grating couplers Silicon-on-insulator Silicon nitride

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Uv to NIR detection with p⁺n-type PureB Ge-on-Si photodiodes fabricated on lightly-doped n-Si substrates 20

UV to NIR detection with p<SUP>+</SUP>n-type PureB Ge-on-Si ...

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2025 conference on Silicon photonics

作者： Hassan, vinayak v. Attariabad, Asma Knezevic, Tihomir Nanvera, Lis K. Univ Twente MESA Inst Hallenweg 15 NL-7522 NH Enschede Netherlands Rudjer Boskovic Inst Bijenicka Cesta 54 Zagreb 10000 Croatia

ISBN: (纸本)9781510684904;9781510684911

Broadband PureB Ge-on-Si photodiodes were fabricated by chemical-vapor deposition (CvD) of crystalline Ge-islands in either 1-mu m- or 3.5-mu m-thick thermal oxide windows patterned on lightly-doped n-Si substrates. To form the anode, the Ge was capped in-situ with a 10-nm-thick boron layer at 700 degrees C. An ultrashallow junction was formed by the B-Ge interfacial bonding, giving optoelectrical characteristics similar to those of PureB Si photodiodes that have been commercialized for photon/electron beams with a few nanometer penetration-depths. This chemically formed junction is damage free, resulting in a low density of interface traps and low dark currents. The high density of misfit dislocations at the Ge-Si interface coupled with the lightly-doped Si substrate led to the formation of a p-type interfacial potential barrier. The responsivity of 406 nm light detected at the Ge surface was compared to longer wavelength light detected deeper in the Ge for different post-deposition processing. Combined with simulations, a negative impact of the Ge-Si interfacial barrier on photogenerated hole collection at the anode was identified. Exposure to H-2 during thermal processing was also found to degrade the responsivity. Optoelectrical characterization was performed showing that the barrier could be reduced by applying up to -20 v reverse bias, whereby, for 4.73 mu m thick Ge islands, responsivities of 0.13, 0.26, 0.50, 0.44 A/W at wavelengths 406, 670, 1310 and 1550 nm, respectively, were achieved with vertical illumination.

关键词： Boron Germanium Photodiode Responsivity PureB Hydrogen Interface barrier

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Get the most out of a fiber laser;from high-power CW to ultrafast operation, from visible to mid-infrared emission 22

Get the most out of a fiber laser;from high-power CW to ultr...

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2025 conference on Fiber Lasers

作者： Bernier, Martin Aydin, Yigit Ozan Paradis, Pascal Fortin, vincent Bisson, William Michaud, Alexandre Michaud, Louis-Charles Boilard, Tommy Lemieux-Tanguay, Maxime Talbot, Lauris Perry-Auger, Quentin Karim, Andrew Leonov, Stanislav Lord, Marie-Pier Olivier, Michel vallee, Real Univ Laval Ctr Opt Photon & Lasers Laval PQ G1V 0A6 Canada

ISBN: (纸本)9781510684324;9781510684331

Low-loss fluoride glass fibers doped with lanthanide ions have greatly expanded the spectral coverage of fiber lasers, which now extends from visible to mid-infrared wavelengths. The availability of powerful lasers at uncommon wavelengths is enabling the emergence of new applications in many fields, including environmental science, materials processing, medicine and defense. This presentation reviews recent advances in rare-earth-doped fluoride fiber lasers, highlighting their operation from continuous wave to the ultrafast regime and their emission from the visible to mid-infrared spectrum, while demonstrating their transformative potential.

关键词： fluoride glass fibers fluoride fiber lasers mid-infrared fiber lasers visible fiber lasers ZBLAN fibers

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High Power Diode Lasers for Quantum Technologies 22

High Power Diode Lasers for Quantum Technologies

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conference on High-Power Diode Laser Technology XXII

作者： Bachmann, Alexander Sivers, Moritz v. Noelleke, Christian Scholz, Matthias Krug, Dennis Globisch, Bjoern Haering, Reto Kaenders, Wilhelm TOPTICA Photon AG Lochhamer Schlag 19 D-82166 Grafelfing Germany Eagleyard Photon GmbH Rudower Chaussee 29 D-12489 Berlin Germany

ISBN: (纸本)9781510669949;9781510669932

After the discovery of quantum mechanics in the early 20th century, lots of progress was made in using quantum effects. Many applications became part of everyday's life. Today, we are at the beginning of the second quantum revolution, that will not only use quantum effects indirectly, but aims at controlling quantum states and using this for a variety of new applications such as quantum computing, information processing, sensing and metrology. The laser, a tool from the first quantum revolution, will play a major role. Many quantum systems based on optical transitions, such as single atoms, ions or artificial atoms require lasers for the initialization and manipulation. Many of them demand "high-quality photons", that is a laser with stable frequency, low linewidth, high beam quality and single-mode frequency tunability. External cavity diode lasers (ECDL) meet these requirements. In addition, each quantum system requires a specific combination of wavelengths and power levels. TOPTICA photonics offers the broadest wavelength coverage from 190 nm to 4 mu m based on direct diode lasers and filling the optical gap with frequency converted diode lasers. For a variety of applications, the output power of an ECDL in the range of a few mW up to approximately 150 mW is not sufficient. Using tapered amplifier chips in a master oscillator power amplifier (MOPA) configuration, commercially available output powers up to 4 W can be achieved while maintaining the properties of the master oscillator, i.e. single-frequency and single-spatial mode operation. R&D results of even higher output power of "high-quality photons" are presented.

关键词： quantum computing quantum information processing quantum sensing high-power diode lasers quantum technologies tapered amplifier MOPA ECDL

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