We demonstrate an enhanced circularly polarized laser emission whose handedness is opposite to the cholesteric helix by the stacked cholesteric polymeric films. The dye-doped right-handed cholesteric polymer film is sandwiched between a mirror and a cholesteric polymer reflector. Due to the stimulated amplification and light recycling effects, the original laser emission from the middle active ...

We demonstrated an ITO-free, highly transparent organic solar cell with the potential to be integrated into window panes for energy harvesting purposes. A transparent, conductive ZnO/Ag/ZnO multilayer electrode and a Ag:Ca thin film electrode were used in this transparent device as the bottom and top electrode, respectively. To further improve the transmittance of the solar cell, the thickness ...

A unidirectional surface gravity wave over a flat bottom topography causes Stokes drift of floating particles. However, rippled can resonantly interact with incident waves and generate reflected waves. This introduces backward component that counters the forward motion Hence act as non-surface-invasive particle trap or reflector thus help in mitigating ocean pollution.

A broadband reflector with a reflectance up to 97.8% over 144 nm spectral range from 1476 1620 is proposed by comprising double-layer subwavelength gratings one grating layer embedded in SiO2 layer. An analysis of the resonance leaky modes overlapping shows physical mechanism wide broad high-reflectivity band. The tolerance structural parameter analyzed and variation bandwidth explained combini...

We propose and demonstrate a novel device structure of resonant cavity-enhanced photodetector (RCE-PD). The new RCE-PD structure consists of a bottom distributed Bragg reflector (DBR), a cavity with InGaAs multiple quantum wells (MQWs) for light absorption and a top mirror of sub-wavelength grating. By changing the fill factor of the 2-D grating, the effective cavity length of RCE-PDs can be va...

We show a hybrid structure consisting of Si film with photonic crystal surface and random triangular gold grooves reflector at the bottom, which is capable of realizing efficient, broad-band, wide-angle optical absorption. It is numerically demonstrated that the enhanced absorption in a broad wavelength range (0.3-9.9 μm) due to the scattering effect of both sides of the structure and the creat...

For inquiry of application of ultrasonic method [UT] possibilities at composite materials inspection specimens based on the carbon fibres that correspond to structure aircraft elements were designed and made. Applied specimens were made of different composite materials with various numbers of layers and various thicknesses. For simulation of delaminating in different layers of tested structure ...

Identifying gas hydrates in the oceanic subsurface using seismic reflection data supported by presence of a bottom simulating reflector (BSR) is not an easy task, given wide range geophysical methods that have been applied to do so. Though BSR attributed attenuation response, as waves transition from hydrate-filled sediment within hydrate stability zone (GHSZ) free gas-bearing below, few studie...

An extensive 3D seismic dataset was used to investigate the contemporary hydrocarbon distribution and historical fluid migration in Melville Bay offshore northwest Greenland, providing first inventory of shallow gas hydrate along this part Greenland margin. The anomalies vary character have been subdivided into four categories that represent (I) isolated gas, (II) free trapped at base stability...