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We report here the lateral size scaling effect of the photonic crystal surface-emitting lasers (PCSELs) based on heterogeneously integrated InGaAsP MQW membranes transferred on silicon photonic crystal cavities. Lateral and vertical confinement schemes were also investigated towards low threshold lasing of PCSELs with small lateral cavity sizes.
We report here heterogeneous photonic crystal (PC) bandedge surface emitting membrane lasers on bulk silicon (Si) substrates. Optically pumped lasers were demonstrated experimentally with single mode operation and side-mode suppression ratio (SMSR) greater than 13.5 dB. Thermal resistance was investigated to evaluate the heat dissipation and lasing characteristics afforded by this integration and...
We report here photonic crystal surface emitting lasers on bulk silicon substrates. Optically pumped lasers were demonstrated with single mode operation. Thermal resistance of such oxide-free cavity was investigated to evaluate the heat dissipation and lasing characteristics.
We report the experimental demonstration of room temperature photonics crystal (PC) bandedge membrane lasers on silicon based on the transfer printing technique. Single mode lasing was observed with linewidth of 4 Å and side-mode suppression ratio (SMSR) greater than 31.5 dB.
We report here high-reflectivity multilayer DBR mirrors in 200–240 nm spectral region. YSZ (yttria-stabilized zirconia), HfO2 and SiO2 films were all prepared by direct RF magnetron sputtering. The film annealing conditions were systematically varied to obtain layers with minimal optical absorption. Combining these results, high reflectivity YSZ/SiO2 and HfO2/SiO2 DBRs were designed and realized with...
With rapid advance of space technologies, the number of on-orbit spacecraft will increase quickly in the future ten years, and then the traditional ground TT&C system based on parabolic antenna will not meet future requirements. Based on ideal spherical array antenna and Digital Beam Forming (DBF), a geodesic dome system for multi-target TT&C and communication is proposed and implemented....
MOSFET type photodetectors, also known as phototransistors, have the advantages of not only high photo sensitivity and responsivity, but also integrability into conventional CMOS chips. In this work, flexible phototransistors with a back gate configuration based on transferrable single crystalline Si nanomembrane (Si NM) have been demonstrated [1–3]. The schematic illustration of the device fabrication...
CMOS compatible lasers on silicon (Si) remain to be an active and challenging area of research for integrated Si photonics. Over the last few years, we have been working on heterogeneous integration of III–V/Si material systems for the development of various photonic crystal membrane lasers on silicon. Earlier we proposed and demonstrated a membrane reflector surface-emitting laser on silicon, based...
We report the detailed design and experimental realization of single mode photonic crystal bandedge surface-emitting lasers on silicon based on a transfer process. By improving the coupling efficiency, the single mode operation regime can be shifted to higher temperatures.
We report here the design and fabrication of transfer-printed four-color multi-junction 4×4 Si/InGaAs membrane photodetector focal plane arrays. Based on the penetration depth dependent absorption of different wavelengths, filter-free color detection can be obtained via four-junction photocurrent measurement and imaging fusion processes.
We report experimental demonstration of a hybrid III-V/Si photonics crystal surface-emitting laser (PCSEL) based on membrane transfer printing technique. Single mode operation was observed with linewidth of 5 Å and side-mode suppression ratio (SMSR) greater than 20 dB.
We report refractive index sensing with ultra-compact surface-normal double-layer stacked Fano resonance photonic crystal slabs. A quality factor of 6,757 and a limit of detection of 5.6×10−5 RIU were experimentally demonstrated, respectively.
We report here design and fabrication of transfer-printed flexible three-color multi-junction 8×8 crystalline silicon membrane photodetector arrays. Based on penetration depth dependent absorption of different wavelengths, filter-free color detection can be obtained via three junction photocurrent measurement and imaging fusion processes.
We report design and fabrication of photonic crystal (PC) Si membrane reflectors with integrated inplane couplers (Si MR-Coupler) based on Fano resonance effect. The measured results show the Si MR-Coupler has a 99% reflection and > 0.22% in-plane coupling efficiency.
In plasma etching process, various physical and chemical mechanisms affect the feature profile evolution. The relative importance of these mechanisms is uncertain. In order to study the physics mechanism of surface etching process, a plasma etching modeling method is proposed, which combines optimization technique with simulation. This paper developed a cumulative GA with evaluated probability to...
Various lasers and light sources on Si via heterogeneous integration of Si/III–V have been reported based on direct growth on Si [1] or wafer bonding technology [2–4]. We reported earlier optically-pumped Si membrane-reflector vertical-cavity surface-emitting lasers (MRVCSELs) fabricated by low-temperature membrane transfer printing processes [5, 6]. Here we report electrically-pumped devices based...
Fano resonance, known from atomic physics, has been employed for a wide variety of nanophotonic structures, such as quantum dots, photonic crystals (PCs), plasmonics, and metamaterials, and so on. [1] With modal dispersion engineering, Fano filters and reflectors can all be realized in single layer dielectric PC structures [2–4]. Suh et al. and Liu et al. reported earlier the optical Q-factors and...
We report here electrically-pumped membrane reflector surface-emitters on silicon based on transferred InGaAsP QW structures sandwiched in between two single-layer Fano resonance photonic crystal membrane reflectors on silicon substrate.
In order to study the physics mechanism of surface etching process in low pressure plasmas, we propose a method to optimize etching yield model, which combines optimization technology with surface evolution algorithm. In plasma etching process, the surface effect of the ions are controlled by etch yield which may be measured by the elaborate experiment. But measuring tool or instrument affect measuring...
The creation of silicon based light sources has been a major research and development effort world-wide. Among various approaches to silicon based light sources reported thus far, the hybrid gain-medium approach (especially integrated with group III–V materials) seems to be the most promising one due to its higher efficiencies than any others. [1]
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