The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
I will discuss my group's recent work on rethinking microscopy from the ground up. I will report on a self-imaging petri dish technology (ePetri) which is capable of streaming microscopy-level live cell culture images directly out of the incubator. I will also discuss our recent work on Fourier Ptychographic Microscopy which enables a standard microscope to push past its physical optical limitations...
We design and demonstrate a compact silicon photonic chip (1.30 mm x 0.52 mm) that integrates electrically-tunable 4-channel add, drop and power control functionalities for a 24x10 Gbit/s WDM data-center network with low power consumption.
We present a silica photonic integrated circuit that includes the pathlength-matched photonic delay lines, spectral demultiplexers, phase modulators, and beam combiners needed for a thin form factor computational imaging system based on long baseline interferometry.
We report the first CW room temperature mid-infrared (λ=2.0μm) laser heterogeneously integrated on silicon. Molecular (polymer-free) wafer bonding of InP to Si is employed. III-V tapers transfer light from a hybrid III-V/silicon optical mode into a Si waveguide mode. Polished Si facets form a Fabry-Pérot laser cavity.
Vesicles comprise of a thin membrane that encapsulates a liquid- or gas-filled reservoir [1, 2]. They are formed via the self-assembly of amphiphilic molecules or proteins under appropriate pressure, temperature and concentration conditions (Fig. 1a). By controlling such conditions, vesicles may be engineered in a variety of sizes, from a few 10's of nm up to 100's μm in diameter.
Simultaneous spatial and temporal focusing (SSTF) of femtosecond pulses was originally conceived as a novel method for increasing the field-of-view in multiphoton imaging applications. Multiphoton imaging with SSTF deviated from traditional nonlinear systems in that it enabled the use of low numerical aperture beams to be used to increase the field-of-view, but retain the axial sectioning of a high...
From touch screens and telecommunications networks, to driving, reading, and enjoying theater, light-based optical information features in much of how we interact with the world. As health care needs advance, optical technologies are becoming increasingly popular, both as complementary and standalone modalities. Since its inception nearly three decades ago, optical coherence tomography (OCT) has emerged...
The spatial and temporal coherence of optical fields are basic properties that have been successfully exploited in biomedical optics. I will discuss our use of optical coherence tomography, an imaging modality that exploits low temporal coherence, to explore microfluidic-scale pulmonary and cardiovascular physiology. I also will discuss our work in the targeted design of desirable spatial coherence...
Varifocal lenses for visible wavelength range applications are fabricated using KTa1−xNbxO3 crystals. The unexpected beam distortion caused by the aberration of the lenses is greatly reduced by suppressing electron injection.
We have developed the Interferometric Reflectance Imaging Sensor (IRIS) for label-free, high throughput, high sensitivity and dynamic detection of molecular binding on a solid surface. Recently, we have demonstrated IRIS with the ability to detect single nanoscale particles. To detect and size nanoparticles, IRIS shines light from visible LED sources on nanoparticles bound to the sensor surface, which...
We propose a new cancer treatment technique in which graphene nanoflakes and carbon nanotubes operate as a self-assembled cluster of spasers near cancer cells causing selective destruction of them by an amplified electric field.
We fabricated solid thin film composed of deoxyribonucleic acid (DNA) complexes based on cetyltrimethylammonium (DNA-CTMA). We developed a re-crystallization process that can reduce the hydroxyl contents significantly, which were confirmed by the Raman spectra measurements. DNA-CTMA film was deposited on a polydimethylsiloxane (PDMS) channel to form a ridge waveguide.
Three primary colors LEDs with a high directional radiation beam profile will be effectively utilized for projection type LED displays. In this light, we notice that InGaN-based nanocolumn LEDs exhibit excellent innate qualities of RGB emission control by the structural parameter of nanocolumn 1, 2), as well as directional radiation property3). GaN nanocolumns were self-assembled by rf-plasma molecular...
We report a significant improvement in the electrical characteristic of compositionally graded InGaN/GaN multiple-quantum-well (MQWs) micro-LED. The efficiency droop in this device occurred at ∼20 times higher injection levels (∼275 A/cm2) compared to a conventional step-MQWs microLED (∼14 A/cm2).
When the emission spectrum of the powder state is adopted, the simulated optical properties show a remarkable discrepancy from those of the fabricated LED package. We suggest that the discrepancy originates from the absorption of Stokes shifted light by a phosphor.
We found it is feasible to reduce RMS power over 30% after of applying alternating driving scheme with filter circuitry for a 2×2 matrix white organic light-emitting diodes (WOLED) lighting unit by equivalent circuitry simulation.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.