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We present a SWIR detector, which combines resonant structures with injection photodetectors. Room temperature dark current of 8nA at 1V and internal quantum efficiency of 72% were measured. 320-by-256 element arrays were fabricated towards focal plane array integration.
We present the near-infrared injection photodetectors with high internal amplification exceeding 10,000 and suppressed shot noise levels with Fano factors of ~0.55. When surface-passivated, devices exhibited high-speed response (3+ GHz) with low jitter <15 ps.
We demonstrate an In0.66Ga0.34As/In0.355Al0.645As strain-compensated injectorless cascade laser; grown by MOCVD, with voltage defect ~30 meV, which is much lower compared to heterogeneous injector cascade laser with 79 meV and conventional cascade laser with 140 meV.
Here we will present a novel method of forming QD based on the lateral confinement on QW by electrical field. The electrical field would deplete the QW into a very small region, forming a "quantum disk". The field induced lateral confinement combined with the vertical confinement of the QW would form a three dimensional confinement.
We have the device under test, which is either our detector or a piece of metal for calibration, mounted under the vibrating AFM tip. To activate the sample we either apply a changing voltage to the tip which generates an electrostatic force, or apply laser light to the sample which deforms the surface potential, altering the electrostatic force. With our AFM we feed the phase output of the vibrating...
The transient response of a nanoinjection infrared photon detector was studied by exploring the relation between lateral charge transfer and jitter. The jitter of the device was measured to be 15 ps at room temperature. The jitter was almost independent of the pulse power, even after device saturation. Spatial maps for delay and amplitude were acquired. The carrier velocity was extracted from the...
For decades, humankind has tried to harness the power of invisible light to image or communicate beyond what our eyes can see. Significant attention has been focused on near infrared (NIR) spectrum, and different types of infrared detection methods have been proposed and developed. Here, we report a new NIR detector based on a type-II band alignment and nano-scale sensing volumes.
We have designed a novel avalanche-free single photon detector for IR wavelengths above 1 μm. The detector shows high quantum efficiency and high gain. A detailed finite-element-method based three-dimensional simulation was developed to model and evaluate the nonlinear effects involved in the design.
A novel infrared single photon detector for wavelengths above 1 mum is presented. It incorporates novel carrier focalization and nanoinjection. A finite element method based simulation is implemented to model and verify predicted superior performance
A novel single photon infrared detector is presented that is capable of operating at room temperature in principle. Unlike avalanche, this method produces no excess noise, and can potentially cover wavelengths from UV to mid-infrared
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