Chip最新文献

{"title":"High thermal conductivity and remarkable damping composite gels as thermal interface materials for heat dissipation of chip","authors":"Sheng-Chang Ding ,&nbsp;Jian-Feng Fan ,&nbsp;Dong-Yi He ,&nbsp;Lin-Feng Cai ,&nbsp;Xiang-Liang Zeng ,&nbsp;Lin-Lin Ren ,&nbsp;Guo-Ping Du ,&nbsp;Xiao-Liang Zeng ,&nbsp;Rong Sun","doi":"10.1016/j.chip.2022.100013","DOIUrl":"10.1016/j.chip.2022.100013","url":null,"abstract":"<div><p>The emerging applications of composite gels as thermal interface materials (TIMs) for chip heat dissipation in intelligent vehicle and wearable devices require high thermal conductivity and remarkable damping properties. However, thermal conductivity and damping properties are usually correlated and coupled each other. Here, inspired by Maxwell theory and adhesion mechanism of gecko's setae, we present a strategy to fabricate polydimethylsiloxane-based composite gels integrating high thermal conductivity and remarkable damping properties over a broad frequency and temperature range. The multiple relaxation modes of dangling chains and the dynamic interaction between the dangling chains and aluminum fillers can efficiently dissipate the vibration energy, endowing the composite gels with ultrahigh damping property (tan δ &gt; 0.3) over a broad frequency (0.01 – 100 Hz) and temperature range (–50 – 150 °C), which exceeds typical state-of-the-art damping materials. The dangling chains also comfort to the interfaces between polymer matrix and aluminum <em>via</em> van der Waals interaction, resulting in high thermal conductivity (4.72 ± 0.04 W m^–1 K^–1). Using the polydimethylsiloxane-based composite gel as TIMs, we demonstrate effective heat dissipation in chip operating under vigorous vibrations. We believe that our strategy could be applied to a wide range of composite gels and lead to the development of high-performance composite gels as TIMs for chip heat dissipation.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100013"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000119/pdfft?md5=c55536d72023afcc72dda11db3dcff23&pid=1-s2.0-S2709472322000119-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76898508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Classical and quantum photonic sources based upon a nonlinear GaP/Si-superlattice micro-ring resonator","authors":"Richard Soref (Life Fellow IEEE) ,&nbsp;Francesco De Leonardis","doi":"10.1016/j.chip.2022.100011","DOIUrl":"10.1016/j.chip.2022.100011","url":null,"abstract":"<div><p>We present a theoretical investigation, based on the tight-binding Hamiltonian, of efficient second- and third-order nonlinear optical processes in the lattice-matched undoped <span><math><mrow><msub><mrow><mo>(</mo><mtext>GaP</mtext><mo>)</mo></mrow><mi>N</mi></msub><mo>/</mo><msub><mrow><mo>(</mo><mrow><mi>S</mi><msub><mi>i</mi><mn>2</mn></msub></mrow><mo>)</mo></mrow><mi>M</mi></msub></mrow></math></span> short-period superlattice that is waveguide-integrated in a microring resonator on an opto-electronic chip. The nonlinear superlattice structures are situated on the optically pumped input area of a heterogeneous “XOI” chip based on silicon. The spectra of <span><math><mrow><msubsup><mi>χ</mi><mrow><mi>z</mi><mi>z</mi><mi>z</mi></mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msubsup><mrow><mo>(</mo><mrow><mn>2</mn><mi>ω</mi><mo>,</mo><mi>ω</mi><mo>,</mo><mi>ω</mi></mrow><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><msubsup><mi>χ</mi><mrow><mi>x</mi><mi>z</mi><mi>x</mi></mrow><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msubsup><mrow><mo>(</mo><mrow><mn>2</mn><mi>ω</mi><mo>,</mo><mi>ω</mi><mo>,</mo><mi>ω</mi></mrow><mo>)</mo></mrow></mrow></math></span>, <span><math><mrow><msubsup><mi>χ</mi><mrow><mi>x</mi><mi>x</mi><mi>x</mi><mi>x</mi></mrow><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></msubsup><mrow><mo>(</mo><mrow><mn>3</mn><mi>ω</mi><mo>,</mo><mi>ω</mi><mo>,</mo><mi>ω</mi><mo>,</mo><mi>ω</mi></mrow><mo>)</mo></mrow></mrow></math></span> and the Kerr refractive index (<span><math><msub><mi>n</mi><mn>2</mn></msub></math></span>), have been simulated as a function of the number of the atomic monolayers for “non-relaxed” heterointerfaces; These nonlinearities are induced by transitions between valence and conduction bands. The large obtained values make the <span><math><mrow><msub><mrow><mo>(</mo><mtext>GaP</mtext><mo>)</mo></mrow><mi>N</mi></msub><mo>/</mo><msub><mrow><mo>(</mo><mrow><mi>S</mi><msub><mi>i</mi><mn>2</mn></msub></mrow><mo>)</mo></mrow><mi>M</mi></msub></mrow></math></span> short-period superlattice a good candidate for future high-performance XOI photonic integrated chips that may include Si₃N₄ or SiC or AlGaAs or Si. Near or at the 810-nm and 1550-nm wavelengths, we have made detailed calculations of the efficiency of second- and third-harmonic generation as well as the performances of entangled photon-pair quantum sources that are based upon spontaneous parametric down conversion and spontaneous four-wave mixing. The results indicate that the <span><math><mrow><msub><mrow><mo>(</mo><mtext>GaP</mtext><mo>)</mo></mrow><mi>N</mi></msub><mo>/</mo><msub><mrow><mo>(</mo><mrow><mi>S</mi><msub><mi>i</mi><mn>2</mn></msub></mrow><mo>)</mo></mrow><mi>M</mi></msub></mrow></math></span> short-period superlattice is competitive with present technologies and is practical for classical and quantum applications.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100011"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000090/pdfft?md5=ce03a50a3d04b4bdc62c1037f22bffa1&pid=1-s2.0-S2709472322000090-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77915988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum advantage with membosonsampling","authors":"Jun Gao ,&nbsp;Xiao-Wei Wang ,&nbsp;Wen-Hao Zhou ,&nbsp;Zhi-Qiang Jiao ,&nbsp;Ruo-Jing Ren ,&nbsp;Yu-Xuan Fu ,&nbsp;Lu-Feng Qiao ,&nbsp;Xiao-Yun Xu ,&nbsp;Chao-Ni Zhang ,&nbsp;Xiao-Ling Pang ,&nbsp;Hang Li ,&nbsp;Yao Wang ,&nbsp;Xian-Min Jin","doi":"10.1016/j.chip.2022.100007","DOIUrl":"10.1016/j.chip.2022.100007","url":null,"abstract":"<div><p>Quantum computer, harnessing quantum superposition to boost a parallel computational power, promises to outperform its classical counterparts and offer an exponentially increased scaling. The term “quantum advantage” was proposed to mark the key point when people can solve a classically intractable problem by artificially controlling a quantum system in an unprecedented scale, even without error correction or known practical applications. Boson sampling, a problem about quantum evolutions of multi-photons on multimode photonic networks, as well as its variants, has been considered as a promising candidate to reach this milestone. However, the current photonic platforms suffer from the scaling problems, both in photon numbers and circuit modes. Here, we propose a new variant of the problem, membosonsampling, exploiting the scaling of the problem can be in principle extended to a large scale. We experimentally verify the scheme on a self-looped photonic chip inspired by memristor, and obtain multi-photon registrations up to 56-fold in 750,000 modes with a Hilbert space up to <span><math><msup><mn>10</mn><mn>254</mn></msup></math></span>. The results exhibit an integrated and cost-efficient shortcut stepping into the “quantum advantage” regime in a photonic system far beyond previous scenarios, and provide a scalable and controllable platform for quantum information processing.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100007"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000053/pdfft?md5=0f8a25d521956b41a5d54f753e36abd9&pid=1-s2.0-S2709472322000053-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77630570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The trend of emerging non-volatile TCAM for parallel search and AI applications","authors":"Ke-Ji Zhou ,&nbsp;Chen Mu ,&nbsp;Bo Wen ,&nbsp;Xu-Meng Zhang ,&nbsp;Guang-Jian Wu ,&nbsp;Can Li ,&nbsp;Hao Jiang ,&nbsp;Xiao-Yong Xue ,&nbsp;Shang Tang ,&nbsp;Chi-Xiao Chen ,&nbsp;Qi Liu","doi":"10.1016/j.chip.2022.100012","DOIUrl":"10.1016/j.chip.2022.100012","url":null,"abstract":"<div><p>In this paper, we review the recent trends in parallel search and artificial intelligence (AI) applications using emerging non-volatile ternary content addressable memory (TCAM). Firstly, the principle and development of four typical emerging memory used to implement the non-volatile TCAM are discussed. Then, we analyze the principle and challenges of SRAM-based TCAM and non-volatile TCAM for the parallel search. Finally, the research trends and challenges of non-volatile TCAM used for AI application are presented, which include computer-science oriented and neuroscience oriented computing.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100012"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000107/pdfft?md5=007c1e9740da5b53bb4db6aadf4e40df&pid=1-s2.0-S2709472322000107-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88776756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sub-femto-Joule energy consumption memory device based on van der Waals heterostructure for in-memory computing","authors":"Zi-Jia Su ,&nbsp;Zi-Hao Xuan ,&nbsp;Jing Liu ,&nbsp;Yi Kang ,&nbsp;Chun-Sen Liu ,&nbsp;Cheng-Jie Zuo","doi":"10.1016/j.chip.2022.100014","DOIUrl":"10.1016/j.chip.2022.100014","url":null,"abstract":"<div><p>In-memory computing has carried out calculations in situ within each memory unit and its main power consumption comes from data writing and erasing. Further improvements in the energy efficiency of in-memory computing require memory devices with sub-femto-Joule energy consumption. Floating gate memory devices based on two-dimensional (2D) material heterostructures have outstanding characteristics such as non-volatility, multi-bit storage, and low operation energy, suitable for application in in-memory computing chips. Here, we report a floating gate memory device based on a WSe₂/h-BN/Multilayer-graphene/h-BN heterostructure, the energy consumption of which is in sub-femto Joule (0.6 fJ) per operation for program/erase, and the read power consumption is in the tens of femto Watt (60 fW) range. We show a Hopfield neural network composed of WSe₂/h-BN/Multilayer-graphene/h-BN heterostructure floating gate memory devices, which can recall the original patterns from incorrect patterns. These results shed light on the development of future compact and energy-efficient hardware for in-memory computing systems.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100014"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000120/pdfft?md5=b75f42cc6fc54d99818f3f11c9cd3eb8&pid=1-s2.0-S2709472322000120-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81218271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum to ‘Topologically protected polarization quantum entanglement on a photonic chip’ [Chip 1, 100003 (2022)].","authors":"Yao Wang ,&nbsp;Yong-Heng Lu ,&nbsp;Jun Gao ,&nbsp;Yi-Jun Chang ,&nbsp;Ruo-Jing Ren ,&nbsp;Zhi-Qiang Jiao ,&nbsp;Zhe-Yong Zhang ,&nbsp;Xian-Min Jin","doi":"10.1016/j.chip.2022.100010","DOIUrl":"10.1016/j.chip.2022.100010","url":null,"abstract":"","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 2","pages":"Article 100010"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000089/pdfft?md5=de74a24133595ad7dba7af106370ead1&pid=1-s2.0-S2709472322000089-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75760641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trends and challenges in the circuit and macro of RRAM-based computing-in-memory systems","authors":"Song-Tao Wei ,&nbsp;Bin Gao ,&nbsp;Dong Wu ,&nbsp;Jian-Shi Tang ,&nbsp;He Qian ,&nbsp;Hua-Qiang Wu","doi":"10.1016/j.chip.2022.100004","DOIUrl":"10.1016/j.chip.2022.100004","url":null,"abstract":"<div><p>Conventional von Neumann architecture faces many challenges in dealing with data-intensive artificial intelligence tasks efficiently due to huge amounts of data movement between physically separated data computing and storage units. Novel computing-in-memory (CIM) architecture implements data processing and storage in the same place, and thus can be much more energy-efficient than state-of-the-art von Neumann architecture. Compared with their counterparts, resistive random-access memory (RRAM)-based CIM systems could consume much less power and area when processing the same amount of data. In this paper, we first introduce the principles and challenges related to RRAM-based CIM systems. Then, recent works on the circuit and macro levels of RRAM-CIM systems will be reviewed to highlight the trends and challenges in this field.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 1","pages":"Article 100004"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000028/pdfft?md5=959475c4c0ee61fd75b74e572faf9857&pid=1-s2.0-S2709472322000028-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87430007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carrier localization enhanced high responsivity in graphene/semiconductor photodetectors","authors":"An-Qi Hu ,&nbsp;Qiao-Li Liu ,&nbsp;Xia Guo","doi":"10.1016/j.chip.2022.100006","DOIUrl":"10.1016/j.chip.2022.100006","url":null,"abstract":"<div><p>Graphene on top of semiconductor builds an emerging highly sensitive photodetector with internal gain. Owing to the graphene/semiconductor interface junction, one kind of photo-excited carriers are drifted to graphene and the other carriers remain in the semiconductor. The decisive factor for the gain is the localization extent of the non-transporting carriers. Several localization strategies such as Schottky barrier regulation, introducing localized states, quantum dot confinement, and double heterojunction design are reviewed. Despite the high sensitivity, the accompanying persistent photocurrent limits the response speed. The long-wavelength light acceleration and the back-gate voltage acceleration methods are utilized to effectively eliminate the persistent photocurrent.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 1","pages":"Article 100006"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000041/pdfft?md5=1135ecdacfbc6af0bf20ad3417608a55&pid=1-s2.0-S2709472322000041-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84740103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Topologically Protected Polarization Quantum Entanglement on a Photonic Chip","authors":"Yao Wang ,&nbsp;Yong-Heng Lu ,&nbsp;Jun Gao ,&nbsp;Yi-Jun Chang ,&nbsp;Ruo-Jing Ren ,&nbsp;Zhi-Qiang Jiao ,&nbsp;Zhe-Yong Zhang ,&nbsp;Xian-Min Jin","doi":"10.1016/j.chip.2022.100003","DOIUrl":"10.1016/j.chip.2022.100003","url":null,"abstract":"<div><p>Quantum entanglement, as the strictly non-classical phenomenon, is the kernel of quantum computing and quantum simulation, and has been widely applied ranging from fundamental tests of quantum physics to quantum information processing. Meanwhile, the topological phase is found inherently capable of protecting physical fields from unavoidable fabrication-induced disorder, which inspires the potential application of topological protection to quantum states. Here, we present the experimental demonstration of topologically protected quantum entangled states on a photonic chip. The process tomography shows that quantum entanglement can be well preserved by the topological states even when the chip material introduces disorder and relative polarization rotation in phase space. Our work links the fields of materials, topological science and quantum physics, opening the door to wide applications of topological enhancement in quantum regime.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 1","pages":"Article 100003"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472322000016/pdfft?md5=e710eb243b03493fda36945da7d2b4f3&pid=1-s2.0-S2709472322000016-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89069831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generation and dynamic manipulation of frequency degenerate polarization entangled Bell states by a silicon quantum photonic circuit","authors":"Dong-Ning Liu ,&nbsp;Jing-Yuan Zheng ,&nbsp;Ling-Jie Yu ,&nbsp;Xue Feng ,&nbsp;Fang Liu ,&nbsp;Kai-Yu Cui ,&nbsp;Yi-Dong Huang ,&nbsp;Wei Zhang","doi":"10.1016/j.chip.2021.100001","DOIUrl":"10.1016/j.chip.2021.100001","url":null,"abstract":"<div><p>A silicon quantum photonic circuit was proposed and realized for the generation and the dynamic manipulation of telecom-band frequency-degenerate polarization entangled Bell states. Frequency degenerate biphoton states were generated in four silicon waveguides by spontaneous four wave mixing. They were transformed to polarization entangled Bell states through on-chip quantum interference and quantum superposition, and then coupled to optical fibers. The property of polarization entanglement in generated photon pairs was demonstrated by two-photon interference under two non-orthogonal polarization bases. The output state could be dynamically switched between two Bell states, which was demonstrated by the simplified Bell state measurement. The experiment results indicated that the manipulation speed supported a modulation rate of several tens kHz, showing its potential on applications of quantum communication and quantum information processing requiring Bell state encoding and dynamic control.</p></div>","PeriodicalId":100244,"journal":{"name":"Chip","volume":"1 1","pages":"Article 100001"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2709472321000010/pdfft?md5=f1332caedc9361676124851ccb62e7e1&pid=1-s2.0-S2709472321000010-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76049974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}