Doping-tunable mid-infrared extraordinary transmission is demonstrated from a periodic metal hole array patterned on n-InSb. The polarization-dependent transmission was measured at room temperature and 77 K. In addition, the extraordinary transmission was measured for incident angles from 0 degrees to 35 degrees in 5 degrees steps. A fundamental resonance shift of approximately 123 cm-1 (1.4 mi...

UNLABELLED Due to the localized surface plasmon (LSP) effect induced by Ag nanoparticles inside black silicon, the optical absorption of black silicon is enhanced dramatically in near-infrared range (1,100 to 2,500 nm). The black silicon with Ag nanoparticles shows much higher absorption than black silicon fabricated by chemical etching or reactive ion etching over ultraviolet to near-infrared ...

To investigate the dust properties, their movements were observed by a high-speed (time resolution of 5.3 ms) infrared camera in the Large Helical Device (LHD). Heated dust velocities were estimated to be 1 – 15 m/s in this experiment. We propose a method for revealing the three-dimensional position of heated dust particles using real and reflected images on the wall observed by an infrared cam...

The technology of detecting axle’s temperature with infrared rays is a new kind of scientific product which plays an important part in the indemnity system of railway rolling stock, The circuit of keyboard and display is a man-machine interactive technology,which is composed of Chip 8279,LED digital display and correlative instruments.Coordinated by Chip 8279,LED digital display perform to read...

We propose mid/far-infrared photodetectors based on coherent sum-frequency generation in a near-resonant cascade of interband and intersubband transitions in high optical nonlinearity asymmetric quantum well structures. Such structures can yield high detectivity and responsivity in the bandwidth of the order of 30% of a central frequency in the mid-infrared range. Resonant up-conversion detecto...

A facility to generate high-intensity, ultra-short pulses of broad-band far-infrared radiation has been assembled and tested at Stanford.’ The device uses sub-picosecond relativistic electron bunches to generate coherent radiation through transition or synchrotron radiation in the far-infrared (FIR) regime between millimeter waves and wavelengths of about 100pm and less. Experimental results sh...

We demonstrate a novel laser design for room temperature THz emission from a quantum cascade laser. The device concept is based on THz emission by difference-frequency generation in mid-infrared quantum cascade lasers with giant nonlinear properties. In contrast to previously demonstrated lasers the presented design significantly simplifies and improves the active medium of the quantum cascade ...

We report on the analysis of thermally-limited operation of quantum-dot infrared photodetectors ~QDIPs!. A device model is developed and used to calculate the QDIP detectivity as a function of the structural parameters, temperature, and applied voltage, as well as to determine the conditions for the detectivity maximum. The QDIP detectivity is compared with that of quantum-well infrared photode...

We report a low-voltage and fast-response polymer network liquid crystal (PNLC) infrared phase modulator. To optimize device performance, we propose a physical model to understand the curing temperature effect on average domain size. Good agreement between model and experiment is obtained. By optimizing the UV curing temperature and employing a large dielectric anisotropy LC host, we have lower...