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Ultrafast magnetoacoustics in ferromagnetic and antiferromagnetic thin-film heterostructures 铁磁和反铁磁薄膜异质结构中的超快磁声
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2647481
S. Zhuang, Jiamian Hu
{"title":"Ultrafast magnetoacoustics in ferromagnetic and antiferromagnetic thin-film heterostructures","authors":"S. Zhuang, Jiamian Hu","doi":"10.1117/12.2647481","DOIUrl":"https://doi.org/10.1117/12.2647481","url":null,"abstract":"Excitation of coherent high-frequency magnons (quanta of spin waves) is critical to the development of high-speed magnonic devices. Here we computationally demonstrate the excitation of coherent terahertz (THz) magnons in ferromagnetic and antiferromagnetic thin films by a photoinduced picosecond acoustic pulse. Analytical calculations are performed to reveal the magnon excitation mechanism. Through spin pumping and spin-charge conversion, these magnons can inject THz charge current into an adjacent heavy-metal film which in turn emits electromagnetic (EM) waves. Based on dynamical phase-field simulations, we show that the emitted EM wave retains the spectral information of all the magnon modes, providing a basis for detection via THz emission spectroscopy.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116767468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hyperdoped Si thin films for infrared detection 红外探测用超掺硅薄膜
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2648363
J. Mathews
{"title":"Hyperdoped Si thin films for infrared detection","authors":"J. Mathews","doi":"10.1117/12.2648363","DOIUrl":"https://doi.org/10.1117/12.2648363","url":null,"abstract":"Hyperdoped Si materials extend Si response range into near infrared by forming intermediate band in Si band gap. Ti hyperdoped Si (Si:Ti) has been demonstrated to have subbandgap photo response. In this work, we fabricated and characterized Si:Ti photodiodes and optimized the structure. At room temperature, the 3.5×10-3 EQE has been obtained at telecommunication wavelength 1550nm. And the detectable response extends until 2250nm. The results show the potential of Si:Ti materials being both Si:Ti photovoltaics and commercialized IR detection. To improve the efficiency of Si:Ti photodetectors, the affection of absorption rate, devices structure and the Si:Ti crystal quality is discussed.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123668691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On exceptional plane, surface, and compound waves 在特殊的平面波、面波和复合波上
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2646120
T. Mackay, A. Lakhtakia, Waleed Iqbal Waseer
{"title":"On exceptional plane, surface, and compound waves","authors":"T. Mackay, A. Lakhtakia, Waleed Iqbal Waseer","doi":"10.1117/12.2646120","DOIUrl":"https://doi.org/10.1117/12.2646120","url":null,"abstract":"How are the field profiles of exceptional plane waves, exceptional surface waves, and exceptional compound waves related to those of their unexceptional counterparts? This matter has been investigated in extensive numerical studies which have revealed that the transition from unexceptional to exceptional waves involves only smooth variations in the electric and magnetic field phasors, and in the time-averaged Poynting vector. Therefore, in terms of field profiles, exceptional plane waves, exceptional surface waves, and exceptional compound waves are practically indistinguishable from their unexceptional counterparts that propagate in directions in the immediate neighborhood of the exceptional waves.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127275726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Architecting the columnar morphology of sculptured thin films for polarization-universal bandgaps 构建用于极化通用带隙的雕刻薄膜的柱状形态
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2646145
Ricardo A. Fiallo, M. Horn, A. Lakhtakia
{"title":"Architecting the columnar morphology of sculptured thin films for polarization-universal bandgaps","authors":"Ricardo A. Fiallo, M. Horn, A. Lakhtakia","doi":"10.1117/12.2646145","DOIUrl":"https://doi.org/10.1117/12.2646145","url":null,"abstract":"Columnar thin films are assemblies of parallel straight columns of nanoscale cross-sectional dimensions grown by physical vapor deposition on appropriate substrates. Sculptured thin films are similar, but the columnar shape is architected for specific objectives. Polarization-universal bandgaps with maximum transmittance under 20% were realized as sculptured thin films of two different types: (i) tightly interlaced matched ambidextrous bilayers (TIMABs) to modify the circular Bragg phenomenon and (ii) equichiral sculptured thin films (ECSTFs) that display the Bragg phenomenon. The serial bideposition technique was employed for architecting the columns. Samples characterized optically as well as with scanning electron microscopy.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129469065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Double-layer antireflection coatings for CIGS thin-film solar cells CIGS薄膜太阳能电池的双层增透涂层
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2645881
Faiz Ahmad, B. Civiletti, P. Monk, A. Lakhtakia
{"title":"Double-layer antireflection coatings for CIGS thin-film solar cells","authors":"Faiz Ahmad, B. Civiletti, P. Monk, A. Lakhtakia","doi":"10.1117/12.2645881","DOIUrl":"https://doi.org/10.1117/12.2645881","url":null,"abstract":"Antireflection coatings are vital for reducing loss due to optical reflection in photovoltaic solar cells. A single-layer magnesium fluoride (MgF2) antireflection coating is usually used in thinfilm CIGS solar cells. According to optics, this coating can be effective only for a narrow spectral regime. Further reduction of reflection loss may require an optimal single-layer or multi-layer coating. Hence, we optimized the refractive indices and thicknesses of single- and double-layer antireflection coatings for CIGS solar cells containing a CIGS absorber layer with: (i) homogeneous bandgap, (ii) linearly graded bandgap, or (iii) nonlinearly graded bandgap. A relative enhancement of up to 1.83% is predicted with an optimal double-layer antireflection coating compared to the efficiency with a single-layer antireflection coating.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131448771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multimode magnon-phonon interaction in ferrimagnetic thin films 铁磁薄膜中的多模磁子-声子相互作用
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2647893
Xufeng Zhang, Jing Xu, Changchun Zhong, Xianjing Zhou, Xu Han, D. Jin, Stephen Gray, Liang Jiang
{"title":"Multimode magnon-phonon interaction in ferrimagnetic thin films","authors":"Xufeng Zhang, Jing Xu, Changchun Zhong, Xianjing Zhou, Xu Han, D. Jin, Stephen Gray, Liang Jiang","doi":"10.1117/12.2647893","DOIUrl":"https://doi.org/10.1117/12.2647893","url":null,"abstract":"Coherent interaction between a single magnon mode and multiple phonon modes is demonstrated on hybrid magnonic device made of ferrimagnetic thin films. Thanks to the high crystalline quality of the thin film, both magnon and phonon modes have very low losses that are comparable to their coupling strengths. This ensures excellent coherence in their interaction, allowing the observation of coherent phenomena such as pulse echo.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127594000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of the composite response of a polygonal array of chiral slab resonators via superposition of transverse modes at the centroid 通过在质心处叠加横向模态分析手性板谐振器多边形阵列的复合响应
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2645120
A. Muntaser, Monish R. Chatterjee
{"title":"Analysis of the composite response of a polygonal array of chiral slab resonators via superposition of transverse modes at the centroid","authors":"A. Muntaser, Monish R. Chatterjee","doi":"10.1117/12.2645120","DOIUrl":"https://doi.org/10.1117/12.2645120","url":null,"abstract":"In this paper, we design arrays of chiral slab resonators (Fabry-Perot-type (FP)) aligned polygonally and illuminated by a linear, p-polarized plane wave incident normally on the array slabs. Each such slab is analyzed using standard chiral slab resonance analyses developed recently [1]; evaluating the corresponding mode spectra for the right- and left-circular polarization ((RCP and LCP) modes for variable chirality coefficients, considering the slab thickness and substrate placement conditions as a function of the (monochromatic) mode frequency. In the polygonal array configuration, photodetectors (PDs) are added to convert the light into photocurrents (related to optical intensity); the intensities from the PDs are superposed at a single spatial point (chosen to be the centroid of the polygon). Hence, in this approach, a net intensity is generated at the centroid in response to a normally illuminated polygonal array. The array design is numerically analyzed, and the overall frequency and parametric properties evaluated. The spectral and resulting intensity behavior vis-à-vis mode frequencies for M slabs is determined under (1) matched resonator (with identical material parameters including thickness (d) and chirality coefficient (𝜅̃)) illumination with maximal transmission (which gives maximum superposed intensity) given by M times each individual intensity; and (2) unmatched resonators with a spread of d and K, such that the overall superposed array intensity pattern becomes adjustable and controllable, resulting in wideband or narrowband modal responses as desired or attainable by design. Both types of composite behavior for the two types of polygonal arrays are examined in detail and results discussed.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117225262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Transport properties of V1-xWxO2 around the metal insulator transition temperature V1-xWxO2在金属绝缘子转变温度周围的输运性质
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2647148
G. Naziripour, E. Shin, G. Subramanyam, N. Dilley, S. Ramanarhan, G. Farlow, V. Vasiliev, B. Claflin, D. Look
{"title":"Transport properties of V1-xWxO2 around the metal insulator transition temperature","authors":"G. Naziripour, E. Shin, G. Subramanyam, N. Dilley, S. Ramanarhan, G. Farlow, V. Vasiliev, B. Claflin, D. Look","doi":"10.1117/12.2647148","DOIUrl":"https://doi.org/10.1117/12.2647148","url":null,"abstract":"The transport properties of W-doped thermochromic V1-xWxO2 (x=0 and 0.0074) thin films prepared by pulsed laser deposition were studied to understand the effect of doping on the electrical properties of these films. Temperature dependent magneto-transport measurements (Hall effect) in magnetic fields up to 9 Tesla were performed on thin film vanadium dioxide (VO2) across the Mott metal-insulator transition (MIT). The Hall carrier density increases by 4 orders of magnitude at MIT. The Hall mobility varies little across the MIT and remains low at ~ 0.05 cm2 /V sec. The majority carriers are electrons. Magneto-resistance is small and positive. Comparison of the three Hall parameters including carrier concentration, conductivity and mobility between various doping levels on both metallic and insulating state are reported and a model has been proposed. A correlation between carrier concentration and conductivity of VO2 films is observed but doesn’t exist between carrier concentration and mobility.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121580234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design principles of tunable optical filters using phase change materials 采用相变材料的可调谐滤光片的设计原理
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2647782
Remona Heenkenda, A. Sarangan
{"title":"Design principles of tunable optical filters using phase change materials","authors":"Remona Heenkenda, A. Sarangan","doi":"10.1117/12.2647782","DOIUrl":"https://doi.org/10.1117/12.2647782","url":null,"abstract":"When designing static filters such as edge, line, bandpass etc.. the conventional approach relies on exploiting the resonances and bandgaps (stop-bands) that occur inside a multilayer thin film structure. When designing for tunability, a different approach is needed, arising primarily from the fact that the refractive index changes that occur in a phase change material (PCM) are generally complex-valued. In this paper, we will review the principles and strategies for designing tunable optical filters.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122055545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrated magnetoelectrics: a path toward novel electronics with ultra-low SWaP-C 集成磁电:通向超低SWaP-C的新型电子学之路
International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors Pub Date : 2023-01-31 DOI: 10.1117/12.2648498
Nian X. Sun
{"title":"Integrated magnetoelectrics: a path toward novel electronics with ultra-low SWaP-C","authors":"Nian X. Sun","doi":"10.1117/12.2648498","DOIUrl":"https://doi.org/10.1117/12.2648498","url":null,"abstract":"The coexistence of electric polarization and magnetization in multiferroic materials provides great opportunities for realizing magnetoelectric coupling, including electric field control of magnetism, or vice versa, through a strain mediated magnetoelectric coupling in layered magnetic/ferroelectric multiferroic heterostructures. Strong magnetoelectric coupling has been the enabling factor for different multiferroic devices, which, however, has been elusive, particularly at RF/microwave frequencies. In this presentation, I will cover the most recent progress on new integrated RF magnetoelectric materials and devices. Specifically, we will introduce magnetoelectric multiferroic materials and their applications in different devices, including voltage tunable RF magnetic components, ultracompact magnetoelectric mechanical antennas immune from ground plane effect with < λ0/100 in size, self-biased operation, excellent impedance matching and ground plane immunity, etc. These magnetoelectric antennas are also smart antennas with picoTesla magnetic field sensitivity, and with orders of magnitude improved figure of merit for wireless power, transfer compared to state-of-the-art technologies. These novel magnetoelectric materials and antennas show great promise for applications in compact, lightweight and power-efficient sensors, antennas and tunable components for radars, communication systems, biomedical devices, IoT, etc.","PeriodicalId":380113,"journal":{"name":"International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115681295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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