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.
We demonstrate critically coupled silicon microring resonators with intrinsic Q close to 300,000 and mode volume Vap20times(lambda/ne)3. For sub-mW optical power, large pump induced resonance shifts were observed for applications in all-optical switching.
Ultra-high Q (>5 times 105) microdisk resonators are demonstrated in a SiNx platform at 650 nm with integrated in-plane coupling waveguides on a Si substrate. Critical coupling to first-order radial-mode is demonstrated using pedestal layer to control coupling.
A novel refractometric sensor based on an embedded optical microfiber loop resonator is presented. The device sensitivity has been studied in two typical configurations and its dependence on the nanowire diameter and coating thickness determined.
We experimentally demonstrated a novel refractometric sensor based on a coated optical microfiber coil resonator which is robust, compact, and comprises an intrinsic fluidic channel. The measured sensitivity has an excellent agreement with theoretical predictions.
The authors demonstrate double-notch-shaped microdisk resonator-based filters with waveguide butt-coupling in silicon-on-insulator. Our filter demonstrates whispering-gallery-like modes with Q exceeding 104. We also propose and fabricate electro-optic modulators using this structure integrated with a metal-oxide-semiconductor capacitor.
The emission of high-Q c-Er2O3 resonators displays little inhomogeneous broadening, robust vacuum-Rabi splitting, and strong upconversion. Considering these effects and a rate-equation model, we analyze the prospects for optically pumped on-chip lasing using c-Er2O3.
Planar electric metamaterials fabricated on thin, flexible substrates are studied using terahertz-time domain spectroscopy. Transmission measurements are performed to analyze dielectric properties on single and multiple stacked samples and reveal strong resonances at 1.2 THz.
We demonstrate a bowtie geometry in a silicon planar resonator with an ultra-small modal volume .01(lambda/2n)3. Bowtie, ring resonators and 1D and 2D photonic crystal resonators are compared for tradeoffs in confinement and quality factors.
We propose two-dimensional nonblocking low-power photonic switch nodes for networks-on-chip using multimode-interference-based waveguide crossing-coupled microring electro-optic switch array in silicon-on-insulator.
We report the manufacturing and optical characterization of microsphere in chalcogenide. We show that high-Q modes of a 9.2 mumm diameter chalcogenide glass can be efficiently excited using a silica tapered fiber.
The integration of photonic crystal (PC) resonators into the active region of terahertz quantum cascade lasers emitting around 2.7 THz is presented. The PC acts as frequency selective mirror and allows the tuning of the emission frequency throughout the entire gain region of the active zone. The PC and the gain region are embedded in a double-metal wave guide.
We report double-notch-shaped microdisk resonators for silicon nonlinear-optic applications with direct in/out coupling via the microdisk notches. We measure optical bistability and resonance wavelength redshifts induced by the notch-coupled pump light.
We propose a high noise rejection filter using complementary ring resonators. The device has a much higher signal/noise ratio than a single ring resonator and can be used as a low noise electro-optic modulator.
We demonstrate superluminal pulse propagation on a silicon chip using an all -optical analog to electromagnetically induced absorption created by the coherent interaction between two micro-resonators. We show group indices tunable between -1158 and -312.
We fabricate horizontal slot waveguides and resonators using layers of polycrystalline and single crystalline silicon. We demonstrate waveguide propagation losses of 7.3 dB/cm and ring resonators with an intrinsic quality factor of 76,000.
We study the evolution of defect states from the band-edges of a 2D photonic crystal. A simple exponential relation is derived for the dispersion of the state, and we investigate the connection with Bloch modes.
Up to 10 times enhancement in the energy transfer rate from donor to acceptor molecules is demonstrated at wavelengths resonant with a whispering gallery mode of a glycerol/water microdroplet standing on a superhydrophobic surface.
We show cascaded silicon microring resonators with 1.5-mum radius critically coupled to a narrower waveguide. A coupled Q of 9,000 is achieved. Devices are fabricated with the widely-available SEM-based lithography system using a stitching-free design.
We demonstrate that optical pulse compression can be realized by tuning the quality factor of an optical microcavity from a high value to a low value, with tuning time shorter than the photon lifetime.
We propose and demonstrate the digital resonance tuning of high-Q/Vm silicon photonic crystal nanocavities using self-limiting atomic layer deposition. Control of resonances of 122 plusmn 18 pm per hafnium oxide atomic layer is achieved.
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.