We introduce a theoretical background for the photonic quantum ring laser facilitating the trap-induced gain-equalized resonances and the photonic quantum corral effect. The emission spectrum characteristics of the three dimensional (3D) toroidal cavity PQR device are discussed with experimental result including its angle dependent behavior. We also present the linewidth narrowing of the 3D Ray...

The precise localization and controlled chemical treatment of structures on a surface are significant challenges for common laboratory technologies. Herein, we introduce a microfluidic-based technology, employing a double-layer microfluidic device, which can trap and localize in situ and ex situ synthesized structures on microfluidic channel surfaces. Crucially, we show how such a device can be...

In this paper the Paul’s trap placed in a homogeneous static magnetic field is presented. The motion of ions in such system is investigated. It is shown that such system can work in two regimes: as a mass-spectrometer and as a device which separates a particle beam depending on the mass and specific charge. An application of the external static magnetic field gives a possibility to work for a n...

We report a microfluidic molecular combing device to trap, stretch, and separate DNA at a singlemolecule resolution. In order to align long DNA into a single direction on surface, we demonstrated molecular combing by dewetting DNA solution inside a microfluidic channel. It used a surface tensional force at the air-water interface of DNA solution translating on a fabricated pattern (zigzag line)...

We have developed an optofluidic device that improves the sensitivity of surface enhanced Raman spectroscopy (SERS) when compared to other SERS approaches. This device has a pinched and step microchannel-nanochannel junction that can trap and assemble nanoparticles/target molecules into optically enhanced SERS active clusters by using capillary force. These SERS active clusters provide an elect...

In this paper, virtual reality techniques are used to define an intuitive interface to a nanoscale manipulation device. This device utilizes optical methods to focus laser light to trap and reposition nano-to-microscopic particles. The underlying physics are simulated by the use of Lagrange mechanics. A unique control method for the manipulation of the particles is also provided. The user can n...

Traps are characterized in AlGaN–GaN HEMTs by means of DLTS techniques and the associated charge/discharge behavior is interpreted with the aid of numerical device simulations. Under specific bias conditions, buffer traps can produce ‘‘false’’ surface-trap signals, i.e. the same type of current-mode DLTS (I-DLTS) or ICTS signals that are generally attributed to surface traps. Clarifying this as...

Selected material and device issues related to the performance of AlGaN/GaN HEMTs on (111) Si substrates are reported. It is shown that these devices can sustain significantly higher dc power (16 W/mm) than those grown on sapphire. Consequently smaller degradation in the device performance at higher temperatures (up to 400 8C) is demonstrated. Photoionisation spectroscopy reveals trap level of ...

Single-beam acoustic tweezers (SBAT), used in laboratory-on-a-chip (LOC) device has promising implications for an individual micro-particle contactless manipulation. In this study, a freestanding hydrothermal PZT thick film with excellent piezoelectric property (d33 = 270pC/N and kt = 0.51) was employed for SBAT applications and a press-focusing technology was introduced. The obtained SBAT, act...