이 연구는 통합 포토닉스 공학 연구 (암호화) 프로젝트 매니저로 박사 J. 스콧 로저스와 프로그램의 센터에서 미국 국방 고급 연구 프로젝트 기관의 후원을받습니다. 이 보고서에서 제공하는 정보는 반드시 위치 또는 미국 정부와 공식적인 승인의 정책이 그렇게 유추해서도 안됩니다이 반영되지 않습니다.

1. PDMS Microsphere 준비 (스피어 I) <ol><li> Polydimethylsiloxane (PDMS) 기반과 경화 에이전트는 60:1의 볼륨 비율로 혼합되어 있습니다. </li><li> 실리카 광섬유의 가닥은 약 2cm 길이, 먼저 광 스트리퍼를 사용하여 플라스틱 cladding을 박탈합니다. </li><li> 섬유의 한쪽 끝은 난방과 팁의 직경이 25-50 μm ~이 줄기 끝을 제공하기 위해 늘어납니다. </li><li> 섬유의 신장 끝은 약 2~4mm의 길이에 의해 PDMS 혼합물로 침수 된 다음 꺼냈다 있습니다. </li><li> PDMS 혼합물의 표면 장력 및 무게는 실리카 섬유의 끝에서 영역의 형성을 위해 수 있습니다. 영역의 크기는 찍어 길이와 추출 속도에 의해 제어됩니다. 범위에서이 두 매개 변수 영역의 직경을 변화시킴으로써 100 μm - 1,000 μm을 얻을 수 있습니다. </li><li> ° C 4 시간 동안 폴리의 적절한 경화 수 있도록 microsphere / 줄기 조립 그런 다음 ~ 90시 오븐에 배치됩니다메르 소재 (교차 연결된 체인을 형성하기 위해). 그림 1a는 스피어의 I.의 개략도이다 </li></ol> 2. PDMS 기반의 트리플 레이어 스피어 준비 (스피어 II) <ol><li> 60:1 PDMS의 microsphere는 내부 코어로 사용됩니다. 위 1)에 설명 된 동일한 단계이 과정에 따라 수 있습니다. </li><li> 바륨 titanate의 혼합물은 (BaTiO 3) 나노 입자와 60:1 PDMS는 중간 레이어로 사용됩니다. 위의 1.1에 설명 된 동일한 방법)에 준비 PDMS 혼합물은, 바륨 titanate 나노 입자과 혼합되어 있습니다. </li><li> 2.1에 설명 된 PDMS의 microsphere 코어)이 후 코트를 (~ 10 μm의 레이어 공칭 두께)에 PDMS-바륨 titanate 혼합물을 과감하게된다. </li><li> 다음, 두 레이어 영역은 ~ 90시 ° C 두 번째 계층의 적절한 경화를 허용하는 4 시간에 오븐에 배치되어 있습니다. </li><li> 두 레이어 영역이 완치되면, 다시 외부 코팅 (3 층)을 제공하는 60:1 PDMS의 혼합물에 몰두하고 있습니다. 이 바깥 쪽층은 구형 광학 가이드 (~ 10 μm의 두께)로 제공하고 있습니다. 그림 1b는 스피어 II의 개략도이다. </li></ol> 3. 실리카 / PDMS의 Microsphere 준비 (스피어 III) <ol><li> 실리카 단일 모드 광섬유의 ~ 3cm 길이 섹션은 우선 버퍼 (플라스틱) 코팅을 박탈되어 다음의 팁은 마이크로 횃불 (함께 cladding와 코어)를 사용하여 녹입니다. 표면 장력과 중력이 영역에 녹인 팁을 형성하기 위해 함께 작동합니다. 200-500 μm에 이르기까지 직경과 영역이 프로세스를 구할 수 있습니다. </li><li> 실리카 microsphere 그런 다음 ~ 50 μm의 코트로 충당하기 위해 (경화 에이전트없이) PDMS 기반의 욕조에 몰두하고 있습니다. 이 외부 층은 높은 점성 빙햄 (항복 응력) 액체로 유지합니다. 그림 1C는 스피어 III의 개략도이다. </li></ol> 4. 광학 섬유 준비 <ol><li> 단일 모드 광섬유의 부분은 그 플라스틱 CIA의 제거입니다광학 스트리퍼를 사용하여 딩. 이 (cladding와 섬유 코어 모두) 용융 될 때까지 섬유의 마이크로 횃불 줄무늬 섹션을 사용하면 가열합니다. </li><li> 중간 섹션 용융이지만, 광섬유의 한쪽 끝이 약 1cm 긴 섬유의 테이퍼 부분을 형성하기 위해 축을 따라 당겨 있습니다. 난방의 기간은, 당기는 속도와 거리가 10 ~ 20 μm를 범위 테이퍼 부분의 직경을 결정합니다. DFB 레이저에서 빛이 섬유의 테이퍼 섹션을 통해 영역으로 연결된다. 그림 2는 구형 섬유 커플 링을 보여줍니다. </li></ol> 5. 광전자 설정 <ol><li> 조정할 수 DFB 레이저의 출력은 한쪽 끝에서 단일 모드 광섬유로 연결되고 그림 3과 같이 다른 쪽 끝에서 빠르게 광 다이오드에 종료됩니다. </li><li> 포토 다이오드의 출력은 아날로그 - 디지털 변환기를 (A / D)를 사용하여 디지털화 및 개인용 컴퓨터 (PC)에 저장됩니다. </li><li&gt; 마이크로 번역 단계를 사용하여 microsphere (유형 I, II 또는 III)은 두개의 요소 사이에 광학 커플 링을 제공하는 광학 섬유의 테이퍼 부분 (도 2 및도 3)과 접촉에서 제기된다. </li><li> DFB 레이저는 레이저 컨트롤러에 의해 조정된다. 차례 레이저 컨트롤러는 톱니 전압 입력을 제공하는 함수 발생기에 의해 구동됩니다. </li></ol> 6. 전기 필드 생성 <ol><li> 1mm의 두께로 두 사각형 황동 플레이트 (2 X 2cm) 균일 한 전기장을 생성하는 데 사용됩니다. 플레이트는 전압 공급 장치에 연결되어 구형 센서는 두 개의 플레이트 (그림 4) 사이의 간격에 배치됩니다. </li><li> 측정 감도를 높이기 위해, 분야가 먼저 2 시간 1 MV / m의 전기장에 poled 있습니다. </li></ol>

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우리는 공개 할 아무 것도 없습니다.

분야는 처음에 DC 고전압 공급 장치에 전극을 연결하여 poled 있습니다. poling 기간의 끝에서 전극 리드는 DC 전압 공급 장치에서 연결이 끊어되며 그림 4에 표시된대로 함수 발생기에 연결되어 있습니다. 결과는 긍정적이고 부정적인 전기 필드 (poling의 방향에 대해) 각각 영역의 연신율 및 압축 될 것으로 8 쇼를 통해 그림 5에 제시했다. 단일 층 60:1 PDMS입니다 영...

<table border="1"><tbody><tr><td></td><td> 회사 </td><td> 카탈로그 번호 </td><td> 코멘트 (선택 사항) </td></tr><tr><td> PDMS </td><td> 다우 코닝 </td><td> Sylgard 184 </td><td></td></tr><tr><td> 실리카 섬유 </td><td> 섬유 악기 판매 </td><td> E-37AP15-FIS </td><td></td></tr><tr><td> 바륨 Titanate (BaTiO 3) 나노 입자 </td><td> 시그마 알드리치 </td><td> 467634-100G </td><td></td></tr><tr><td> 레이저 컨트롤러 </td><td> ILX Lightwave </td><td> LDC-3724B </td><td></td></tr><tr><td> DFB 레이저 </td><td> 기어 </td><td> 기어 2300 </td><td> 1.310 μm 중심 파장 </td></tr><tr><td> 포토 다이오드 </td><td> Thorlabs </td><td> PDA10CS </td><td></td></tr><tr><td> A / D 카드 </td><td> 내쇼날 인스트루먼트 </td><td> PXI 6115 </td><td></td>
 </tr>
 </tbody>
</table>

development of whispering gallery mode polymeric micro-optical electric field sensors

유전체 마이크로 충치의 광학 모드는 응용 프로그램의 다양한에서 자신의 가능성에 대한 최근 몇 년 동안 상당한 관심을 받았습니다. 광학 모드는 자주 (WGM) 또는 &quot;형태 의존 resonances&quot;(MDR)과 높은 광학 품질 요소를 나타내는 &quot;갤러리 모드를 속삭이면서&quot;로 지칭합니다. 마이크로 캐비티 광 resonators의 일부 제안 된 응용 프로그램은 분광법 1 마이크로 캐비티 레이저 기술 2, 광 통신 3-6뿐만 아니라 센서 기술에 있습니다. WGM 기반의 센서 응용 프로그램은 생물학 7, 추적 가스 검출 8 그와 액체 9 불순물 검출이 포함되어 있습니다. microsphere의 resonators에 따라 기계적 센서는 힘 10,11, 압력 12, 가속 13 벽 전단 응력 14을 포함하여 제안되어왔다. 현재에는, 우리는 이전 studi을 토대로 WGM 기반의 전기장 센서를 검증에스 15,16. 이 센서의 후보 응용 프로그램은 neuronal 행동 잠재력의 검출에 있습니다. 전기장 센서는 고분자 다층 유전체 마이크로을 기반으로합니다. 외부 전기장은 탄성 변형에 이르는 영역 (electrostriction 효과)에 표면과 신체 힘을 유도한다. 분야의 형태의 변경은 WGM의 변화로 연결됩니다. 전기장 유도 WGM의 변화는 레이저 빛으로 분야의 흥미로운 광학 모드에 의해 심문을하고 있습니다. 배포 의견의 빛은 (DFB) 레이저 (~ 1.3 μm의 공칭 파장) 단일 모드 광섬유의 테이퍼 섹션을 사용하여 마이크로에 사이드 커플 링입니다. 분야의 기본 자료는 polydimethylsiloxane (PDMS)입니다. 세 microsphere의 형상이 사용됩니다 : 기본 - 투 - 경화 에이전트 혼합물의 60:1 용적 비율 (1) PDMS의 영역, 60:1 PDMS 핵심 (2) 멀티 레이어 영역을 일의 일정 유전체을 향상시키기 위해전자 분야, 바륨 titanate의 다양한 양의 (볼륨의 2 % 10 %) 및 ​​60:1 PDMS의 외부 층과 얇은 층으로 코팅 (3) 고체 실리카 구체와 혼합 60:1 PDMS의 중간 층 uncured PDMS 기지. 센서의 각 유형에서 테이퍼 광섬유에서 레이저 광은 높은 광학 품질 요소 WGM (Q ~ 10 6) 제공하는 가장 바깥 층에 연결된다. 마이크로은 전기장에 대한 자신의 감도를 높이기 위해 ~ 1 MV / m의 전기장에 여러 시간 동안 poled 있습니다.

빛에 의해 여행 광학 경로 길이는 레이저 파장의 여러 정수 때 영역의 광학 모드 (WGM)은 레이저 빛 예정입니다. 그림 3에 표시된 배열은 광학 경로 길이는 각각 N과 R이 영역의 굴절률과 반경 아르 2πrn,입니다. 기하학적 광학 근사치를 사용 WGM 조건이 만족 될 때 2πrn = lλ 내가 정수이며, λ는 레이저의 파장입니다. DFB 레이저는 작은 파장 범위에 걸쳐 조...

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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

높은 감도 광자 마이크로 센서는 전기장 감지하기 위해 개발되었습니다. 센서는 유전체 영역의 광학 모드를 이용하는. 외부 전기장 교란의 광학 모드의 변화로 이어지는 영역의 형태의 변화. 전기장 강도는 이러한 광학 변화를 모니터링하여 측정됩니다.

갤러리 모드 고분자 마이크로 광 전기장 센서 글린의 개발

Optical modes of dielectric micro-cavities have received significant attention in recent years for their potential in a broad range of applications. The ...

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JoVE Journal

Engineering

13.0K 조회수.  Southern Methodist University. 높은 감도 광자 마이크로 센서는 전기장 감지하기 위해 개발되었습니다. 센서는 유전체 영역의 광학 모드를 이용하는. 외부 전기장 교란의 광학 모드의 변화로 이어지는 영역의 형태의 변화. 전기장 강도는 이러한 광학 변화를 모니터링하여 측정됩니다.

비디오: Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave photonics systems rely fundamentally on the interaction between microwave and optical signals. These systems are extremely promising for various areas of technology and applied science, such as aerospace and communication engineering, sensing, metrology, nonlinear photonics, and quantum optics. In this article, we present the principal techniques used in our lab to build microwave photonics systems based on ultra-high Q whispering gallery mode resonators. First detailed in this article is the protocol for resonator polishing, which is based on a grind-and-polish technique close to the ones used to polish optical components such as lenses or telescope mirrors. Then, a white light interferometric profilometer measures surface roughness, which is a key parameter to characterize the quality of the polishing. In order to launch light in the resonator, a tapered silica fiber with diameter in the micrometer range is used. To reach such small diameters, we adopt the "flame-brushing" technique, using simultaneously computer-controlled motors to pull the fiber apart, and a blowtorch to heat the fiber area to be tapered. The resonator and the tapered fiber are later approached to one another to visualize the resonance signal of the whispering gallery modes using a wavelength-scanning laser. By increasing the optical power in the resonator, nonlinear phenomena are triggered until the formation of a Kerr optical frequency comb is observed with a spectrum made of equidistant spectral lines. These Kerr comb spectra have exceptional characteristics that are suitable for several applications in science and technology. We consider the application related to ultra-stable microwave frequency synthesis and demonstrate the generation of a Kerr comb with GHz intermodal frequency.

The customized techniques developed in our lab to build microwave photonics systems based on ultra-high Q whispering gallery mode resonators are presented. The protocols to obtain and characterize these resonators are detailed, and an explanation of some of their applications in microwave photonics is given.

마이크로 웨이브 포토닉스 시스템 속삭이는 - 갤러리 모드 공진기를 기반으로

Microwave photonics systems rely fundamentally on the interaction between microwave and optical signals. These systems are extremely promising for various ...

연구

공학

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

Mechanically underdamped electrostatic fringing-field MEMS actuators are well known for their fast switching operation in response to a unit step input bias voltage. However, the tradeoff for the improved switching performance is a relatively long settling time to reach each gap height in response to various applied voltages. Transient applied bias waveforms are employed to facilitate reduced switching times for electrostatic fringing-field MEMS actuators with high mechanical quality factors. Removing the underlying substrate of the fringing-field actuator creates the low mechanical damping environment necessary to effectively test the concept. The removal of the underlying substrate also a has substantial improvement on the reliability performance of the device in regards to failure due to stiction. Although DC-dynamic biasing is useful in improving settling time, the required slew rates for typical MEMS devices may place aggressive requirements on the charge pumps for fully-integrated on-chip designs. Additionally, there may be challenges integrating the substrate removal step into the back-end-of-line commercial CMOS processing steps. Experimental validation of fabricated actuators demonstrates an improvement of 50x in switching time when compared to conventional step biasing results. Compared to theoretical calculations, the experimental results are in good agreement.

The robust device design of fringing-field electrostatic MEMS actuators results in inherently low squeeze-film damping conditions and long settling times when performing switching operations using conventional step biasing. Real-time switching time improvement with DC-dynamic waveforms reduces the settling time of fringing-field MEMS actuators when transitioning between up-to-down and down-to-up states.

실시간 DC-동적 바이어스 방법 심각하게 부족 감쇠 프린 징 필드 정전기 MEMS 엑츄에이터에서 시간 개선을 전환하기위한

Mechanically underdamped electrostatic fringing-field MEMS actuators are well known for their fast switching operation in response to a unit step input ...

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Holovideo displays are based on light-bending spatial light modulators. One such spatial light modulator is the anisotropic leaky mode modulator. This modulator is particularly well suited for holographic video experimentation as it is relatively simple and inexpensive to fabricate1-3. Some additional advantages of leaky mode devices include: large aggregate bandwidth, polarization separation of signal light from noise, large angular deflection and frequency control of color1. In order to realize these advantages, it is necessary to be able to adequately characterize these devices as their operation is strongly dependent on waveguide and transducer parameters4. To characterize the modulators, the authors use a commercial prism coupler as well as a custom characterization apparatus to identify guided modes, calculate waveguide thickness and finally to map the device's frequency input and angular output of leaky mode modulators. This work gives a detailed description of the measurement and characterization of leaky mode modulators suitable for full-color holographic video.

This work describes fabrication and characterization of anisotropic leaky mode modulators for holographic video.

Holovideo에 대한 이방성 새는 모드 변조기의 특성

Holovideo displays are based on light-bending spatial light modulators.  One such spatial light modulator is the anisotropic leaky mode modulator.  This ...

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

Dielectric microspheres can confine light and sound for a length of time through high quality factor whispering gallery modes (WGM). Glass microspheres can be thought as a store of energy with a huge variety of applications: compact laser sources, highly sensitive biochemical sensors and nonlinear phenomena. A protocol for the fabrication of both the microspheres and coupling system is given. The couplers described here are tapered fibers. Efficient generation of nonlinear phenomena related to third order optical non-linear susceptibility &#935;(3) interactions in triply resonant silica microspheres is presented in this paper. The interactions here reported are: Stimulated Raman Scattering (SRS), and four wave mixing processes comprising Stimulated Anti-stokes Raman Scattering (SARS). A proof of the cavity-enhanced phenomenon is given by the lack of correlation among the pump, signal and idler: a resonant mode has to exist in order to obtain the pair of signal and idler. In the case of hyperparametric oscillations (four wave mixing and stimulated anti-stokes Raman scattering), the modes must fulfill the energy and momentum conservation and, last but not least, have a good spatial overlap.

Efficient generation of nonlinear phenomena related to third order optical non-linear susceptibility &#935;(3) interactions in triply resonant silica microspheres is presented in this paper. The interactions here reported are: Stimulated Raman Scattering (SRS), and four wave mixing processes comprising Stimulated Anti-stokes Raman Scattering (SARS).

Microspherical 위스퍼 링 갤러리 모드 공진기에 자극 스톡스와 Antistokes 라만 산란

Dielectric microspheres can confine light and sound for a length of time through high quality factor whispering gallery modes (WGM). Glass microspheres ...

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

The reliability of computational fluid dynamics (CFD) codes is checked by comparing simulations with experimental data. A typical data set consists chiefly of velocity and temperature readings, both ideally having high spatial and temporal resolution to facilitate rigorous code validation. While high resolution velocity data is readily obtained through optical measurement techniques such as particle image velocimetry, it has proven difficult to obtain temperature data with similar resolution. Traditional sensors such as thermocouples cannot fill this role, but the recent development of distributed sensing based on Rayleigh scattering and swept-wave interferometry offers resolution suitable for CFD code validation work. Thousands of temperature measurements can be generated along a single thin optical fiber at hundreds of Hertz. Sensors function over large temperature ranges and within opaque fluids where optical techniques are unsuitable. But this type of sensor is sensitive to strain and humidity as well as temperature and so accuracy is affected by handling, vibration, and shifts in relative humidity. Such behavior is quite unlike traditional sensors and so unconventional installation and operating procedures are necessary to ensure accurate measurements. This paper demonstrates implementation of a Rayleigh scattering-type distributed temperature sensor in a thermal mixing experiment involving two air jets at 25 and 45 &#176;C. We present criteria to guide selection of optical fiber for the sensor and describe installation setup for a jet mixing experiment. We illustrate sensor baselining, which links readings to an absolute temperature standard, and discuss practical issues such as errors due to flow-induced vibration. This material can aid those interested in temperature measurements having high data density and bandwidth for fluid dynamics experiments and similar applications. We highlight pitfalls specific to these sensors for consideration in experiment design and operation.

We demonstrate use of a fiber optic distributed sensor for mapping the temperature field of mixing air jets. The Rayleigh scattering-based sensor generates thousands of data points along a single fiber to provide exceptional spatial resolution that is unattainable with traditional sensors such as thermocouples.

고해상도 온도 필드 매핑을위한 광섬유 분산 센서

The reliability of computational fluid dynamics (CFD) codes is checked by comparing simulations with experimental data. A typical data set consists ...

Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors

Small silver clusters confined inside zeolite matrices have recently emerged as a novel type of highly luminescent materials. Their emission has high external quantum efficiencies (EQE) and spans the whole visible spectrum. It has been recently reported that the UV excited luminescence of partially Li-exchanged sodium Linde type A zeolites [LTA(Na)] containing luminescent silver clusters can be controlled by adjusting the water content of the zeolite. These samples showed a dynamic change in their emission color from blue to green and yellow upon an increase of the hydration level of the zeolite, showing the great potential that these materials can have as luminescence-based humidity sensors at the macro and micro scale. Here, we describe the detailed procedure to fabricate a humidity sensor prototype using silver-exchanged zeolite composites. The sensor is produced by suspending the luminescent Ag-zeolites in an aqueous solution of polyethylenimine (PEI) to subsequently deposit a film of the material onto a quartz plate. The coated plate is subjected to several hydration/dehydration cycles to show the functionality of the sensing film.

A protocol for the synthesis of moisture-responsive luminescent Ag-zeolite composites is described in this report.

발광 기반 습도 센서와 같은 나노 구조 AG-제올라이트 복합

Small silver clusters confined inside zeolite matrices have recently emerged as a novel type of highly luminescent materials. Their emission has high ...

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

A method of carrier number control by electrolyte gating is demonstrated. We have obtained WS2 thin flakes with atomically flat surface via scotch tape method or individual WS2 nanotubes by dispersing the suspension of WS2 nanotubes. The selected samples have been fabricated into devices by the use of the electron beam lithography and electrolyte is put on the devices. We have characterized the electronic properties of the devices under applying the gate voltage. In the small gate voltage region, ions in the electrolyte are accumulated on the surface of the samples which leads to the large electric potential drop and resultant electrostatic carrier doping at the interface. Ambipolar transfer curve has been observed in this electrostatic doping region. When the gate voltage is further increased, we met another drastic increase of source-drain current which implies that ions are intercalated into layers of WS2 and electrochemical carrier doping is realized. In such electrochemical doping region, superconductivity has been observed. The focused technique provides a powerful strategy for achieving the electric-filed-induced quantum phase transition.

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Here, we present a protocol to control the carrier number in solids by using the electrolyte.

A method of carrier number control by electrolyte gating is demonstrated. We have obtained WS2 thin flakes with atomically flat surface via scotch tape ...

Ultrasonic Fatigue Testing in the Tension-Compression Mode

Ultrasonic fatigue testing is one of a few methods which allow investigating fatigue properties in the ultra-high cycle region. The method is based on exposing the specimen to longitudinal vibrations on its resonance frequency close to 20 kHz. With use of this method, it is possible to significantly decrease the time required for the test, when compared to conventional testing devices usually working at frequencies under 200 Hz. It is also used to simulate loading of material during operation in high speed conditions, such as those experienced by components of jet engines or car turbo pumps. It is necessary to operate only in the high and ultra-high cycle region, due to the possibility of extremely high deformation rates, which can have a significant influence on the test results. Specimen shape and dimensions have to be carefully selected and calculated to fulfill the resonance condition of the ultrasonic system; thus, it is not possible to test the full components or specimens of arbitrary shape. Before each test, it is necessary to harmonize the specimen with the frequency of the ultrasonic system to compensate for deviations of the real shape from the ideal one. It is not possible to run a test until a total fracture of the specimen, since the test is automatically terminated after initiation and propagation of the crack to a certain length, when the stiffness of the system changes enough to shift the system out of the resonance frequency. This manuscript describes the process of evaluation of materials' fatigue properties at high-frequency ultrasonic fatigue loading with use of mechanical resonance at a frequency close to 20 kHz. The protocol includes a detailed description of all steps required for a correct test, including specimen design, stress calculation, harmonizing with the resonance frequency, performing the test, and final static fracture.

A protocol for ultrasonic fatigue testing in the high and ultra-high cycle region in axial tension-compression loading mode.

Ultrasonic fatigue testing is one of a few methods which allow investigating fatigue properties in the ultra-high cycle region. The method is based on ...

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7&#8722;&#948;/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 (STO) Single-crystal Substrates

Here, we demonstrate a method of coating ferromagnetic La0.67Sr0.33MnO3 (LSMO) nanoparticles on (001) SrTiO3 (STO) single-crystal substrates by radio frequency (RF) magnetron sputtering. LSMO nanoparticles were deposited with diameters from 10 to 20 nm and heights between 20 and 50 nm. At the same time, (Gd) Ba2Cu3O7&#8722;&#948; ((Gd) BCO) films were fabricated on both undecorated and LSMO nanoparticle decorated STO substrates using RF magnetron sputtering. This report also describes the properties of GdBa2Cu3O7&#8722;&#948;/ La0.67Sr0.33MnO3 quasi-bilayer films structures (e.g., crystalline phase, morphology, chemical composition); magnetization, magneto-transport, and superconducting transport properties were also evaluated.

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7ÃƒÂ¢Ã‹â€ &#039;ÃƒÅ½ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Here, we present a protocol to grow LSMO nanoparticles and (Gd) BCO films on (001) SrTiO3 (STO) single-crystal substrates by radio frequency (RF)-sputtering.

고주파 마 그 네트 론 스퍼터 링 GdBa2Cu3O7−δ의 라0.67SrTiO3 (STO) 단 결정 기판에 Sr0.33MnO3 준 bilayer 영화 /

Here, we demonstrate a method of coating ferromagnetic La0.67Sr0.33MnO3 (LSMO) nanoparticles on (001) SrTiO3 (STO) single-crystal substrates by radio ...

Hybrid Printing for the Fabrication of Smart Sensors

A method to combine additively manufactured substrates or foils and multilayer inkjet printing for the fabrication of sensor devices is presented. First, three substrates (acrylate, ceramics, and copper) are prepared. To determine the resulting material properties of these substrates, profilometer, contact angle, scanning electron microscope (SEM), and focused ion beam (FIB) measurements are done. The achievable printing resolution and suitable drop volume for each substrate are, then, found through the drop size tests. Then, layers of insulating and conductive ink are inkjet printed alternately to fabricate the target sensor structures. After each printing step, the respective layers are individually treated by photonic curing. The parameters used for the curing of each layer are adapted depending on the printed ink, as well as on the surface properties of the respective substrate. To confirm the resulting conductivity and to determine the quality of the printed surface, four-point probe and profilometer measurements are done. Finally, a measurement set-up and results achieved by such an all-printed sensor system are shown to demonstrate the achievable quality.

Here we present a protocol for the fabrication of inkjet-printed multilayer sensor structures on additively manufactured substrates and foil.

스마트 센서의 제조에 인쇄 하는 하이브리드

A method to combine additively manufactured substrates or foils and multilayer inkjet printing for the fabrication of sensor devices is presented. First, ...