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- 摘要
- 关键词
- 实验方案
- 产品
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Overview on Monolithically Integrated Arrays of Microtubular Vertical Resonators on Photonic Waveguides for Optofluidic Applications
摘要： A novel platform for optofluidic applications is realized by monolithic integration of an array of ultra-compact three-dimensional (3D) vertically rolled-up microtube ring resonators (VRU-MRRs) with polymer waveguides. The on-chip integrated system is realized by rolling up 2D differentially strained TiO2 nanomembranes into 3D microtubular cavities on a nanophotonic chip. Whispering-gallery modes are observed in the telecom wavelength range, and their spectral peak positions shift significantly when measurements are performed while immersing the tubes or filling their hollow cores with water. The achievement of this work opens up fascinating opportunities to realize massively parallel optofluidic microsystems with exceptional multi-functionality for analysis of biomaterials in lab-in-a-tube systems on a single chip.
关键词： monolithic integration,optofluidic,array of ultra-compact optical sensors,vertically rolled-up microtube ring resonators,3D microcavities
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE Radio Frequency Integrated Circuits Symposium (RFIC) - Boston, MA, USA (2019.6.2-2019.6.4)] 2019 IEEE Radio Frequency Integrated Circuits Symposium (RFIC) - A 21 to 30-GHz Merged Digital-Controlled High Resolution Phase Shifter-Programmable Gain Amplifier with Orthogonal Phase and Gain Control for 5-G Phase Array Application
摘要： This paper presents a 21 to 30-GHz merged passive vector sum phase shifter (PS) and programmable gain amplifier (PGA) with sub-degree phase resolution for 5-G phased array application. In PS, a transformer-based full-differential high-order resonant coupler functions as a quadrature generator (QG) with a novel layout strategy to achieve broad bandwidth, low loss, and accurate quadrature phase within only one inductor-footprint. Compared to the conventional transformer-based fourth order resonant coupler, the proposed resonant coupler with higher order features much wider quadrature bandwidth. Two phase invariant 6-bit binary-weighted arrays of vector modulators scale the quadrature signals to achieve the desired high resolution vector phase interpolation. In PGA, a phase invariant and dB-linear gain is achieved by adopting a “fractional-bit-based” PGA design. The chip prototype is fabricated in a 65-nm CMOS process, this implementation achieves 43% fractional BW-3dB (20 to 31-GHz). The phase control operates with 0.8° steps while maintaining a minimum RMS phase error of 0.42°, demonstrating the best phase accuracy when compared to state-of-the-art mm-wave PSs.
关键词： high-order,phased array,quadrature generator,ultra-compact,programmable gain amplifier,Phase shifter
更新于2025-09-16 10:30:52