INTRODUCTION: The role of stretchable electronics systems allows the design of new reconfigurable macro-electronics, that extends a device capability to function as a distributed sensor network which can potentially be used for wearable electronics. At the moment such devices are primarily based on polymeric materials such as PDMS or Polyimide [1,2]. Nevertheless, silicon has been the predomina...

This paper presents an integrated spherical photoacoustic cell (SPAC) for trace methane (CH4) gas detection. Theoretical analysis and analogue simulations are carried out to analyze the acoustic field distribution of SPAC at resonant non-resonant modes. The finite element simulation results based on COMSOL show that first-order radial frequency second-order angular 24,540 Hz 18,250 Hz, respecti...

In this paper, we present a novel near field transducer (NFT) design concept for heat assisted recording. design, metal bars separated by thin dielectric are used to form resonance plasmonic grating with distributed feedback (DFB). The motivation such structure is the use of separation enhancing material stability at elevated temperature so that best materials can be without compromising much n...

Original results are presented for an optical wireless system employing dicode pulse position modulation (DiPPM) and a PINBJT receiver. When operating at 0.85 m and a bit rate of 10 Mb/s, a sensitivity of 51 dBm (Pe 10 ) is achieved, which represents a 10.3-dB improvement, as compared to an equivalent PCM system. The work also demonstrates that DiPPM achieves comparable sensitivities to those o...

Original results are presented for an optical wireless system employing dicode pulse position modulation (DiPPM) and a PIN-BJT receiver. When operating at 0.85 m λ μ = and a bit rate of 10 Mb/s a sensitivity of –51 dBm (Pe=10) is achieved and this represents a 10.3 dB over an equivalent PCM system. The work demonstrates that DiPPM achieves comparable sensitivities as that for the digital PPM fo...

A InGaAs PIN-photodetector and a lumped SHBT-transimpedance-preamplifier have been mono-lithically integrated and characterized. The preamlifier achieves a transimpedance gain of 44:6 dB (170) and the optical/electrical ?3dB-bandwidth of the entire receiver is 46 GH z. This is, to the best of our knowledge, the highest bandwidth for any HBT based photoreceiver reported to date.

This paper reviews the hyper-media photonic information network (HM-PIN) concept as a candidate of innovative future networks based on photonic technologies. The HM-PIN having a universal network interface integrates a variety of information services: telecommunications, newspapers, magazines, TV broadcasts and the growing collection of information servers. This network fundamentally offers thr...

In this paper, a parallel MZM and quadrupling frequency technique are used to produce 72 GHz mm-wave. The determined optical sideband suppression ratio (OSSR) is 71 decibels. This mm-wave signal's performance compared that of two modulators, the Mach Zehnder Modulator (MZM) Electro Absorption (EAM) as well different kinds photodiodes, Avalanche Photodiode (APD) PIN-PD. When using EAM modulator,...

This paper presents a technique for multi-channel optical ow estimation. We combine the brightness constancy constraint with the relationship between optical ow elds and disparity elds in estimating optical ow elds by solving systems of linear equations. In this formulation, the so called round-about compatibility constraint is used to ensure the coherence between optical ow elds and to pin dow...