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It is significant research approach in the field of manipulation and sorting of a small size of particle and molecule with dimensions of tens to hundreds of nanometers in a microfluidic chip. It is a breakthrough research that provides new solutions and opportunities for a wide range of traditional micro-/nano-particle and molecule sorting, manipulation and detection by using optofluidic force. Also,...
This paper presents an optical force driven nano-machined actuator and the “pull-back” effect of a free-standing arc in an opto-mechanical ring resonator system. This nano-actuator obtains a maximal central displacement of 43.1 nm, with an actuation resolution of 0.28 nm, via tuning the wavelength of the control light at a fixed optical power of 2.8 mW. The “pull-back” effect occurs at the maximal...
This paper reports a compact optical wavelength tracker, which consists of an electrically controlled tunable micro-ring resonator and a flip-chip bonded photodiode. The input optical wavelength is measured and the wavelength change is tracked by analyzing the photocurrent variation of the photodiode. This wavelength tracker has compact size (0.5 mm × 1.5 mm), high resolution (3 pm), cost-effective...
Two separate contacts are incorporated into the different arms of Quantum Cascade lasers with asymmetric Mach-Zehnder interferometer type cavities. Preliminary results reveal an almost-continuous single mode tuning range of 20 cm−1 at 80K.
A channel drop filter combination of a circular ring resonator and two point defect micro-cavities was proposed. The ring resonator works as an energy coupler via capturing the electromagnetic energy propagated in the input waveguide and sends it to the output waveguide at its resonant frequencies. And the point defect micro-cavities are used to further filter the original lightwave. In our designed...
Microparticle trapping and manipulation using the optical force in double coupled ring resonator (DCRR) through wavelength tuning is reported in this paper. The DCRR consists of two coupled identical rings, and a waveguide that is side-coupled to the two rings. The microparticles are propelled by optical radiation force and trapped by optical gradient force, which are both generated by the evanescent...
This paper presents a Nano-opto-mechanical actuator, which is driven by optical radiation force. The actuator consists of two waveguides, two identical ring resonators, and an actuator with Bragg reflector. Light is injected into the waveguides and coupled to the Bragg reflector via the ring resonator. The actuator is displaced by the optical force. The achieved maximum displacement of the actuator...
This paper reports a silicon-based micromachined optical power detector with on-chip measurement ability. The optical power is detected by an integrated electron-tunneling displacement transducer, in which optical force is employed as the bridge between optical energy and mechanical energy transition. Compared with the traditional optical power detectors, which are based on photo absorption, the proposed...
This work presents an opto-mechanical linear actuator utilizing the gradient optical force between two identical parallel waveguides. The actuator size shrinks to nanoscale dimensions. Theoretical study shows that the actuator deflection is controlled over optical signals and linearly proportional to the applied optical power. Such optical actuator takes full advantages of the nanotechnology, and...
This paper presents a pressure sensor array based on optical force using Nano-opto-mechanical Systems (NOMS). It consists of a deformable diaphragm and a waveguide array. When pressure is applied on the diaphragm, the gap between the diaphragm and the waveguide is reduced. The induced optical force deforms the waveguide and change the optical loss. In the experiment, it measures up to 32 dB optical...
In this paper, an optical switch driven by the optical force is demonstrated based on Nanoelectromechanical system (NEMS) technology. The switch consists of a Mach-Zehnder interferometer (MZI) and a ring resonator. One of the MZI arms is suspended to enable optical switching by optical force induced displacement. The optical force is introduced by injecting a control light into the ring resonator...
In this paper, a Nano-opto-mechanical (NOM) switch is designed, simulated and experimentally demonstrated, using the electromagnetically induced transparency (EIT)-like effects of coupled-ring resonator. The control of the switch is realized by optical force between the silicon waveguide and the dielectric substrate. As the injection pump power increases from 0 to 6 mW, the normalized power of transmission...
This paper reports a tunable three-dimensional (3D) liquid-liquid waveguide laser constructed by two flow streams in a microchannel. It comprises a 3D dye dissolved liquid-liquid waveguide as gain medium and gold (Au) mirrors to provide feedback. The 3D liquid-liquid waveguide is highly efficient to overcome the optical loss as compared with liquid-liquid three-dimensional (2D) waveguide. The lasing...
We demonstrate a long-period waveguide grating filter based on coupling the long-range surface plasmon mode of a buried metal stripe to a cladding mode. We achieve a rejection band of ~19 dB at ~1500 nm.
We present two designs of polymer Mach-Zehnder interferometers to demonstrate the bottom-heating approach for the realization of thermo-optic waveguide devices. The more efficient design requires an electric power of 17 mW for a π-phase shift.
We demonstrate single mode operation of Quantum Cascade lasers employing a folded Fabry-Perot resonator waveguide design. Single mode emission is achieved with ∼20dB side mode suppression up to ∼400mA above threshold current in pulsed operation.
Optical switches are important for applications in optical communications and photonic integrated circuits (PICs) to allow for selection of optical paths. In this work, a thermo-optic switch based on a Mach-Zehnder interferometer (MZI) is designed. A comparison and optimization of the switch components, including beam splitters, couplers and MZI, is carried out. A 1 × 2 switch using silicon nitride...
We analyze the excitation of the long-range surface plasmon mode of a metal-coated waveguide with a long-period grating for refractive-index sensing. This sensing principle can offer both high sensitivity and high precision for biomedical applications.
We demonstrate a new approach of fabricating a thermo-optic polymer-waveguide Mach-Zehnder interferometer (MZI). The MZI is fabricated with an imprinting technique, where the electrode heater is formed at the bottom of the waveguide substrate.
We present a UV-written polymer long-period waveguide grating coupler, which can be tuned over a wavelength range of 100 nm with a temperature control of 22 degC. Its coupling efficiency varies between 57% and 80%.
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