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A NORMAL-INCIDENCE TYPE-ii QUANTUM-WELL INFRARED PHOTODETECTOR USING AN INDIRECT ALAS AL0.5GA0.5AS SYSTEM GROWN ON (110) GAAS FOR MIDWAVELENGTH AND LONG-WAVELENGTH MULTICOLOR DETECTION

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JOURNAL OF APPLIED PHYSICS 1993年第2期74卷 1382-1387页

作者： WANG, YH LI, SS HO, P MANASREH, MO GE CO ELECTR LAB SYRACUSE NY 13221 USA WRIGHT LAB SOLID STATE ELECTR DIRECTORATE WRIGHT PATTERSON AFB OH 45433 USA

A normal-incidence type-ii indirect AlAs/Al0.5GaD.5As quantum-well infrared photodetector grown on (110) GaAs by molecular-beam epitaxy for mid- and long-wavelength multispectrum detection has been developed. The normal-incident excitation of long-wavelength intersubband transition was achieved in the [110] X-band-confined AlAs quantum wells. Six absorption peaks including four from X-band to r-band intersubband resonant transitions were observed at wavelengths, lambda(p1 - 6) = 2.2, 2.7, 3.5, 4.8, 6.5, and 12.5 mum. The resonant transport from X band to GAMMA band gives rise to high photoconductive gain, which is highly desirable for focal plane arrays image sensor applications.

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Equilibrium vortex structures of type-ii/1 superconducting films with washboard pinning landscapes

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PHYSICA C-SUPERCONDUCTIVITY AND ITS applications 2018年 548卷 55-60页

作者： Wei, C. A. Xu, X. B. Xu, X. N. Wang, Z. H. Gu, M. Nanjing Univ Ctr Superconducting Phys & Mat Natl Lab Solid State Microstruct Nanjing 210093 Jiangsu Peoples R China Nanjing Univ Dept Phys Nanjing 210093 Jiangsu Peoples R China

We numerically study the equilibrium vortex structures of type-ii/1 superconducting films with a periodic quasi one-dimensional corrugated substrate. We show as a function of substrate period and pinning strength that, the vortex system displays a variety of vortex phases including arrays consisted of vortex clumps with different morphologies, ordered vortex stripes parallel and perpendicular to pinning troughs, and ordered one-dimensional vortex chains. Our simulations are helpful in understanding the structural modulations for extensive systems with both competing interactions and competing periodicities.

关键词： Superconducting films

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Electrochemiluminescence detection based on Ruthenium(ii) tris(bipyridine) immobilised in sulfonic-functionalised titania nanoparticles by ion exchange strategy

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ANALYST 2009年第10期134卷 2100-2105页

作者： Li, Yali Yang, Fan Yang, Xiurong Chinese Acad Sci Changchun Inst Appl Chem State Key Lab Electroanalyt Chem Changchun 130022 Peoples R China Chinese Acad Sci Grad Sch Beijing 100039 Peoples R China

A novel Ruthenium(ii) tris(bipyridine)-based solid-state electrochemiluminescence (ECL) sensor was developed in this paper. The sensor was fabricated by immobilising tris(2,2'-bipyridyl) ruthenium(ii) (Ru(bpy)(3)(2+)) in sulfonic-functionalised porous titania (TiO2-SO3H) nanoparticles via an ion exchange strategy, followed by employing environment friendly and stable biopolymer chitosan (CHIT) to entrap Ru(bpy)(3)(2+)/TiO2-SO3H onto the ITO electrode. The prepared ECL sensor exhibited excellent ECL behaviors and a wide linear range from 7.5 x 10(-9) to 2.5 x 10(-3) M (R = 0.98) with a detection limit of 1.67 x 10(-10) M (S/N = 3) towards 2-(dibutylamino)-ethanol (DBAE) detection. In addition, it had good reproducibility, and the relative average deviation was 0.95% of ECL intensity-time curve under continuous potential scanning for 34 cycles. It also had good long-term stability for the DBAE detection. After being used in three weeks, the sensor was able to keep over 80% activity towards 2.5 x 10(-4) M of DBAE. Fabrication of the ECL sensor by this method is simple and easy, and hence has potential applications in ECL analysis and detection.

关键词： CHEMILUMINESCENCE BIOCHEMICAL markers ELECTROCHEMICAL sensors BIOPOLYMERS RUTHENIUM NANOPARTICLES TITANIUM dioxide MICROFABRICATION ION exchange (Chemistry)

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A dynamic range expansion method for a CMD imager

A dynamic range expansion method for a CMD imager

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Conference on solid state sensor arrays - development and applications

作者： Shimamoto, H Mitani, K Fujita, Y NHK Science and Technical Research Laboratories Tokyo Japan

ISBN: (纸本)0819424307

A dynamic range expansion method for Charge Modulation Device (CMD) imagers has been proposed and an experimental circuit was evaluated. As active pixel sensors, CMD imagers offer significant advantages in terms of non-destructive readout and high-speed operation. Furthermore, the CMD imager used in this study has built-in dual vertical shift registers which can start their scanning independently. We applied our newly developed source reset method to the imager, which enables each pixel charge to be reset by external circuits. By using these functions, we have obtained our dynamic range expansion method. The source reset method enables each pixel of a CMD imager to be reset selectively. We use it for a regional electrical shutter. For instance, if there is an overexposed pixel, its accumulated charge is reset from outside the imager, so that the pixel charge is prevented from becoming saturated. The non-destructive readout and high-speed operation enable the CMD imager to be read multiple times without destruction of accumulated charges. For instance, if the imager is driven twice in one field period, each pixel's accumulations can be checked and reset selectively from external of the device at the first scanning, then, all the signals are obtained at the second scanning and output through a small process circuit. This dynamic range expansion method for CMD imagers needs only a simple feedback Circuit but does not need complex equipment externally nor adding reset circuits on a chip. An experimental circuit with this method was successfully evaluated here.

关键词： Charge Modulation Device source reset method dynamic range expansion active pixel sensor non-destructive readout feedback circuit

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Design, optimization and testing of novel spectroscopic systems for investigating direct lanthanide photoluminescence and for the development of xerogel-based chemical sensors and materials

Design, optimization and testing of novel spectroscopic syst...

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作者： Holthoff, William G. State University of New York at Buffalo

学位级别：Ph.D.

This dissertation centers on the design and testing of new instrumentation and techniques for: (1) high throughput screening of optical sensing films, arrays and biodegradable materials; (2) novel radioluminescent light sources for remote sensing applications; and (3) direct lanthanide (iiI) photoluminescence measurements. First, this dissertation describes our approach to characterize the physicochemical properties within xerogel-based composites by using a combination of steady-state and time-resolved fluorescence. A description of the automated methods utilized for the construction and rapid screening of xerogel libraries is provided. Next, a radioluminescent (RL) light source is evaluated for the development of photonically-based chemical responsive sensor arrays. The RL light source is assessed by determining the analytical figures of merit from two tris(4,7'-diphenyl-1,10'-phenathroline) ruthenium(ii)-doped xerogel-based sensor platforms. Finally, we describe the design, optimization, and testing of a novel spectroscopic system for investigating direct lanthanide (iiI) photoluminescence. This section describes the analytical figures of merit and describes challenges overcome to make this system operational.

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Light-Emitting Diodes: Materials, Devices, and applications for solid state Lighting XV

Light-Emitting Diodes: Materials, Devices, and Applications ...

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Light-Emitting Diodes: Materials, Devices, and applications for solid state Lighting XV

ISBN: (纸本)9780819484918

The proceedings contain 24 papers. The topics discussed include: energy efficient illumination for the biological clock;human preference in tunable solid state lighting;human health and well-being: promises for a bright future from solid-state lighting;improvement in efficiency droop of GaN-based light-emitting diodes by optimization of active regions;randomized micro lens arrays for color mixing;density-activated defect recombination as a possible explanation for the efficiency droop in GaN-based diodes;characteristics of linear position sensor based on bi-cell photodiode;a flexible rugged testbed for passive solar collector development;nitride nanowire structures for LED applications;nanostructure based antireflection coatings for EO/IR sensor applications;luminescent features of novel sol-gel derived lanthanide multi-doped oxyfluoride nano-structured phosphors for white LED;and luminescent ceramics for LED conversion.

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High performance large infrared and visible astronomy arrays for low background applications: Instruments performance data and future developments at Raytheon

High performance large infrared and visible astronomy arrays...

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Conference on Infrared Systems and Photoelectronic Technology ii

作者： Beuville, Eric Acton, David Corrales, Elizabeth Drab, John Levy, Alan Merrillb, Michael Peralta, Richard Ritchie, William Raytheon Vis Syst Goleta CA 93117 USA Natl Opt Astron Observ Tucson AZ 85719 USA

ISBN: (纸本)9780819468086

Raytheon Vision Systems (RVS) has developed a family of high performance large format infrared detector arrays for astronomy and civil space applications. RVS offers unique off-the-shelf solutions to the astronomy community. This paper describes mega-pixel arrays, based on multiple detector materials, developed for astronomy and low-background applications. New focal plane arrays under development at RVS for the astronomy community will also be presented. Large sensor Chip Assemblies (SCAB) using various detector materials like Si:PINT, HgCdTe, InSb, and Si:As IBC, covering a detection range from visible to large wavelength infrared (LWIR) have been demonstrated with an excellent quantum efficiency and very good uniformity. These focal plane arrays have been assembled using state-of-the-art low noise, low power, readout integrated circuits (ROIC) designed at RVS. Raytheon packaging capabilities address reliability, precision alignment and flatness requirements for both ground-based and space applications. Multiple SCAs can be packaged into even larger focal planes. The VISTA telescope, for example, contains sixteen 2k X 2k infrared focal plane arrays. RVS astronomical arrays are being deployed world-wide in ground-based and space-based applications. A summary of performance data for each of these array types from instruments in operation will be presented (VIRGO Array for large format SWIR, the ORION and VISTA arrays, NEWFIRM and other solutions for MWIR spectral ranges).

关键词： infrared astronomy readouts megapixel focal plane array InSb HgCdTe Si : PIN Raytheon

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solid-state Imaging arrays

Solid-State Imaging Arrays

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solid-state Imaging arrays 1985

The proceedings contain 24 papers. The topics discussed include: the solid state image sensor's contribution to the development of silicon technology;CCD charge collection efficiency and the photon transfer technique;high density frame transfer image sensors with vertical anti-blooming;advances in CCD technology;digital charge coupled device (CCD) camera system architecture;backside charging of the CCD;large area CCD image sensors for scientific applications;enhancement of x-ray performance with new GEC charged coupled devices (CCD);simplified technique of hologram generation and transmission;and performance analysis of the photon-counting image acquisition system.

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Self-aligned patterning technique for fabricating high-performance diamond sensor arrays with nanoscale precision

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SCIENCE ADVANCES 2022年第38期8卷 000-000页

作者： Wang, Mengqi Sun, Haoyu Ye, Xiangyu Yu, Pei Liu, Hangyu Zhou, Jingwei Wang, Pengfei Shi, Fazhan Wang, Ya Du, Jiangfeng Univ Sci & Technol China CAS Key Lab Microscale Magnet Resonance Hefei 230026 Peoples R China Univ Sci & Technol China Sch Phys Sci Hefei 230026 Peoples R China Univ Sci & Technol China CAS Ctr Excellence Quantum Informat & Quantum Phy Hefei 230026 Peoples R China Univ Sci & Technol China Hefei Natl Lab Hefei 230088 Peoples R China

Efficient, nanoscale precision alignment of defect center creation in photonics structures in challenges the realization of high-performance photonic devices and quantum technology applications. Here, we propose a facile self-aligned patterning technique based on conventional engineering technology, with doping precision that can reach similar to 15 nm. We demonstrate this technique by fabricating diamond nanopillar sensor arrays with high consistency and near-optimal photon counts. The sensor array achieves high yield approaching the theoretical limit, and high efficiency for filtering sensors with different numbers of nitrogen vacancy centers. Combined with appropriate crystal orientation, the system achieves a saturated fluorescence rate of 4.34 Mcps and effective fluorescencedependent detection sensitivity of 1800 cps(-1/2). These sensors also show enhanced spin properties in the isotopeenriched diamond. Our technique is applicable to all similar solid-state systems and could facilitate the development of parallel quantum sensing and scalable information processing.

关键词： Fluorescence

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Vapor-Phase Amine Intercalation for the Rational Design of Photonic Nanosheet sensors

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CHEMISTRY OF MATERIALS 2018年第8期30卷 2557-2565页

作者： Ganter, Pirmin Schoop, Leslie M. Daentl, Marie Lotsch, Bettina V. Max Planck Inst Solid State Res Heisenbergstr 1 D-70569 Stuttgart Germany Ludwig Maximilians Univ LMU Munchen Dept Chem Butenandtstr 5-13 D-81377 Munich Germany NIM Schellingstr 4 D-80799 Munich Germany Ctr Nanosci Schellingstr 4 D-80799 Munich Germany Princeton Univ Dept Chem Princeton NJ 08544 USA

The development of vapor sensors with tunable sensitivity and selectivity is highly desirable because of the manifold applications ranging from air quality monitoring to food control. The design of such sensors remains, however, a great challenge. Here, we address this challenge by intercalating primary and tertiary alkylamines with varying alkyl chain lengths into H3Sb3P2O14 nanosheet-based Fabry-Perot interference sensors. As the sensors are photonic in nature, the different amines can be distinguished based on their intercalation time and optical shift. Since the amines are protonated during intercalation and therefore trapped, this allows us to use amine modification as the basis for creating optical sensors. Intercalation of different amines gradually and widely tunes the sensor's sensitivity and selectivity to various analytes. This adjustment of sensing properties allows us to construct a sensor array on a single chip, which can distinguish different volatile organic compounds. The color change of this sensor array upon exposure to solvent vapors can be tracked with the naked eye, making this system a promising platform for the high-fidelity identification of volatile compounds. The sensor design protocol presented herein is straightforward and robust and can be transferred to other nanosheet-based devices for the rational tuning of their vapor-sensing properties and beyond.

关键词： Nanosheets spectral shift air quality monitoring color change sensors rational design Intercalation photonic sensor arrays Amines

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