Abner launches the E2-SCS single-pixel device scanning imaging module! It can be used to demonstrate the imaging potential of single/single-pixel photoelectric sensor devices in applications such as image sensing, helping you add more intuitive performance graphs to your papers. Our company can custom-fabricate high-precision stainless steel masks engraved with university names, research group names, specific patterns, optical structures and more, providing a one-stop solution for imaging challenges!
Recently, the research team led by Ho Chung Yin from City University of Hong Kong reported a high-performance gate-tunable anti-bipolar phototransistor based on 1D GaAsSb/2D MoS₂ heterostructure in the renowned journal ACS Nano. By optimizing gate modulation, this heterostructure device achieves excellent performance under 532 nm illumination, featuring an on-off ratio up to 4×10⁴, a response time of 50 μs, and a high detectivity of 1.64×10¹¹ Jones.
Considering the high photosensitivity in the visible light region, researchers used a scanning imaging setup with heterojunction diodes as basic pixel units to verify whether GaAsSb/MoS2 ambipolar phototransistors possess promising potential for image sensing applications. The data results demonstrate their favorable imaging capability (see figure below), further indicating that the device has great application prospects in optoelectronics and sensing fields.
Module Structure Interpretation
This module is equipped with an external electric XY-axis stepper motor, featuring a travel range of 75 (X) * 50 (Y) mm and a minimum step size of 1 μm. The scanning range and motor movement can be controlled via computer software. The laser is connected to the SMA fiber coupling port through an optical fiber. The emitted laser is coupled through a lens, passes through a hollow metal foil mask, and is then output via a fiber port closely attached to the mask, so as to irradiate the surface of the photodetector. After the scanning area and step size are selected via software, the mask can move automatically. The photoresponse status of the device is read in real time by the test software, and the image of the sampled area is displayed.
Two operation modes are supported
① Combined with our E2 series fiber-coupled probe station:
The E2 fiber-coupled photoelectric test probe station has an excitation light wavelength ranging from 250 to 1550 nm. Through a series of optical path coupling, the laser is normally incident on the device surface from the objective lens. The irradiation spot is a uniform light spot with a diameter covering a wide range from 5.4 μm to 480 μm. A white LED is provided as an indicator to show the laser irradiation position.
② Direct fiber light output for sample irradiation, compatible with most standard probe stations:
Free from optical path constraints, this mode has broader applicability. A fiber fixing bracket can be assembled with the probe station or optical platform to prevent fiber vibration during long-time scanning, which may cause unstable light sources. The laser irradiates the sample surface directly, with a minimum spot diameter of 200 μm.
Schematic diagram of laser irradiation on the sample
Product Parameters:
*Specific parameters shall be subject to the quotation document.
