Proceedings incorporates 43 papers. These are arranged into six sessions dealing with the following major topics: assembly methods and materials for optical systems;advanced optical manufacturing and testing;optical d...
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ISBN:
(纸本)0819409251
Proceedings incorporates 43 papers. These are arranged into six sessions dealing with the following major topics: assembly methods and materials for optical systems;advanced optical manufacturing and testing;opticaldesign and engineering;optical fabrication and testing;as well as contemporary optical systems and devices.
The proceedings contained 20 papers from the journal on currentdevelopments in Lens design and opticalengineering. The topics discussed included: optics for binocular telescopes;enhancements to the optimization proc...
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The proceedings contained 20 papers from the journal on currentdevelopments in Lens design and opticalengineering. The topics discussed included: optics for binocular telescopes;enhancements to the optimization process in lens design;integrated opticaldesign and advanced opticaldesign for biochip scanning systems.
The proceedings contains 44 papers. Some of the specific topics discussed are: multiple-temperature lens design optimization;engineering an agile beam director for laser radar;beam design of a noncooperative interfero...
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ISBN:
(纸本)081941249X
The proceedings contains 44 papers. Some of the specific topics discussed are: multiple-temperature lens design optimization;engineering an agile beam director for laser radar;beam design of a noncooperative interferometer;performance evaluation of a noisy hologram;and anticounterfeit holographic marks with secret codes.
PurposeOptogenetics is an invaluable tool to study brain circuits, but typical systems rely on tethered approaches to deliver light to the brain that hinder natural behavior. With the increasing prevalence of complex ...
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PurposeOptogenetics is an invaluable tool to study brain circuits, but typical systems rely on tethered approaches to deliver light to the brain that hinder natural behavior. With the increasing prevalence of complex behavioral phenotyping in neuroscience experiments, wireless devices for optical stimulation offer great promise to overcome these *** this work we critically review recent systems engineering and device design approaches to deliver light to the brain with wireless operation for optogenetic *** describe strategies used for wireless control and communication, wireless power transfer, and light delivery to the brain with a focus on device integration for in vivo operation in freely behaving *** advances in optoelectronic systems, material science, and microtechnology have enabled the design and realization of miniaturized wirelessly-controlled optical stimulators for true untethered experiments in rodent models.
Flexible mechano-optical sensors (FMOS) achieve quantitative sensing of mechanical stimuli by monitoring changes in optical response, and due to the incorporation of a polymeric matrix/substrate, they exhibit high fle...
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Flexible mechano-optical sensors (FMOS) achieve quantitative sensing of mechanical stimuli by monitoring changes in optical response, and due to the incorporation of a polymeric matrix/substrate, they exhibit high flexibility, elasticity, and biocompatibility. This wireless and visualized sensing capability offers potential for both in situ and in vivo applications. In this review, we delve into the mechanisms and developments of two types of FMOS: "active" mechanoluminescence (ML) and "passive" mechanoplasmonics (MP). The focus is on how ML particles and polymers can be combined in various configurations (such as bulk, laminar, and woven blending systems) to yield robust, multifunctional, and hybrid optical/electrical properties, exploring their potentials in engineering, information, and wearable/implantable applications. Additionally, the tunability of ML intensity and emission color under mechanical and various environmental stimuli is summarized, leading to a discussion on the versatile MP nanostructures. With their sophisticated artificial design, MP demonstrates promise for both small-scale sensing and high-level control over spectral wavelength and intensity. Lastly, based on current research on ML and MP, challenges and prospects for combining these two technologies to advance the field of FMOS are proposed.
Enormous developments have been achieved in the design of organic theranostics agents simultaneously with diagnostic and therapeutic performances, especially in the second near-infrared (NIR-ii, 1000-1700 nm) window. ...
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Enormous developments have been achieved in the design of organic theranostics agents simultaneously with diagnostic and therapeutic performances, especially in the second near-infrared (NIR-ii, 1000-1700 nm) window. One major challenge for the further progress of organic theranostics agents is the rarity of efficient materials simultaneously integrated with optical and magnetic performances, especially with tumor-responsive performance. Herein, a magnetic resonance imaging (MRI)-sensitive, NIR-ii-excitable conjugated polymer material is developed as a multifunctional nanoplatform for efficient tumor microenvironment (TME)-activated multimodal cancer theranostics. With D-A molecular engineering and ferrocene anchoring, the absorption capability of ferrocene-typed conjugated polymers (FCPs) can be rationally regulated to achieve NIR-ii absorption. The water-dispersive FCP-3 NPs demonstrate superior NIR-ii-excitable photothermal performance (PCE = 54 %) and T2-weighted MRI responses toward tumor endogenous H2O2. Upon NIR-ii irradiation, FCP-3 NPs can efficiently generate reactive oxygen species (ROS) through NIR-ii photothermal-augmented Fenton reaction in the TME. Both in vitro and in vivo experiments confirm that the FCP-3 NPs have high-performance combination therapy of NIR-ii photothermal therapy and augmented chemodynamic therapy with TME-sensitive magnetic resonance and photoacoustic dual-modal imaging, which realizes 100 % tumor elimination with high safety. This work offers a major step toward designing tumor microenvironment-activated polymeric materials for smart multimodal cancer theranostics.
The short-mid-/mid-wave infrared (SMWIR/MWIR) detectors can capture target information in two bands simultaneously, enhancing the recognition accuracy in challenging interference scenarios by suppressing complex backg...
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The short-mid-/mid-wave infrared (SMWIR/MWIR) detectors can capture target information in two bands simultaneously, enhancing the recognition accuracy in challenging interference scenarios by suppressing complex background. Here, we explore the optoelectrical properties of InAs/InAsSb-superlattice-based dual-band niBin detectors consisting of SMWIR/MWIR absorbers separated by an AlGaAsSb unipolar barrier. The experimental and simulated results show that: i) The bandgaps of both SMWIR and MWIR absorbers can be consistently determined via transmission and photocurrent spectra, giving cutoff wavelengths of 4.16 mu m and 5.21 mu m (77 K), respectively, well in line with the design values;ii) The device structure shows n-type conductivity by Hall measurements, based on which the conduction and scattering mechanisms at various temperatures can be clarified;iii) Dark current density analysis reveals the temperature dependent dominant current mechanisms, i. e., the generation-recombination current in 150 K - 210 K and the diffusion current above 210 K;and iv) The Burstein-Moss effect can make the determined optical bandgap slightly redshifted ( 34 meV), as compared to that of electrical techniques. This work provides new insights into bandgap engineering and structural design for MWIR dual-color detectors based on InAs/InAsSb superlattices.
current progress in the scaling of continuous wave optical output power and conversion efficiency of broad-area GaAs-based edge emitters, broad-area lasers (BALs), operating in the 900 & mldr;1000 nm wavelength ra...
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current progress in the scaling of continuous wave optical output power and conversion efficiency of broad-area GaAs-based edge emitters, broad-area lasers (BALs), operating in the 900 & mldr;1000 nm wavelength range is presented. Device research and engineering efforts have ensured that BALs remain the most efficient of all light sources, so that in the past 10 years, power conversion efficiency at 20 W continuous wave (CW) output power from BA lasers with a 90 & mldr;100 mu m wide stripe has increased 1.5-fold to 57% (via epitaxial layer designdevelopments), whilst peak CW power per single emitter has increased around 3-fold to 70 W (via scaling of device size), with further scaling underway, for example via use of multi-junction designs. However, the peak achievable CW power conversion efficiency and CW specific output power (defined here as peak output power from a 100 mu m stripe diode lasers with a single p-n junction) has changed remarkably little, remaining around 70% and 25 W, respectively, for the past decade. Fortunately, research to understand the limits to peak efficiency and specific output power has also shown progress. Specifically, recent studies indicate that spatial non-uniformity in optical field and temperature play a major role in limiting both power and conversion efficiency. Technological efforts motivated by these discoveries to flatten lateral and longitudinal temperature profiles have successfully increased both power and efficiency. In addition, epitaxial layer designs with very high modal gain successfully reduce threshold current and increase slope at 25 degrees C to values comparable to those observed at 200 K, offering a path toward the 80% conversion efficiency range currently seen only at these cryogenic temperatures. Overall, whilst operating efficiency and power continue to scale rapidly, a technological path for increased specific power and peak efficiency is also emerging.
Data-driven developments in lensless imaging, such as machine learning-based reconstruction algorithms, require large datasets. In this work, we introduce a data acquisition pipeline that can capture from multiple len...
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