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Vol. 170

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2021-01-21 PIER Vol. 170, 63-78, 2021. doi:10.2528/PIER20122201

Computational Investigation of Nanoscale Semiconductor Devices and Optoelectronic Devices from the Electromagnetics and Quantum Perspectives by the Finite Difference Time Domain Method (Invited Review)

Huali Duan, Wenxiao Fang, Wen-Yan Yin, Erping Li, and Wenchao Chen

In the simulation of high frequency nanoscale semiconductor devices in which electromagnetic (EM) fields and carrier transport are coupled, and optoelectronic devices in which strong interactions between EM fields and charged particles exist, both the Maxwell's equations and the time-dependent Schrödinger equation (TDSE) need to be solved to capture the interactions between EM and quantum mechanics (QM). One of the numerical simulation methods for solving these equations is the finite difference time domain (FDTD) method. In this review paper, the development of FDTD method applied in EM and QM simulation is discussed. Several widely used FDTD techniques, i.e., explicit, implicit, explicit staggered-time, and Chebyshev methods, for solving the TDSE are introduced and compared. The hybrid approaches based on FDTD method, which are used to solve the Poisson-TDSE and Maxwell-TDSE coupled equations for EM-QM simulation, are also discussed. Furthermore, the applications of these simulation methods for nanoscale semiconductor devices and optoelectronic devices are introduced. Finally, a conclusion is given.

2021-01-15 PIER Vol. 170, 17-62, 2021. doi:10.2528/PIER20122108

Advanced Progress on Χ(3) Nonlinearity in Chip-Scale Photonic Platforms (Invited Review)

Zhe Kang, Chao Mei, Luqi Zhang, Zhichao Zhang, Julian Evans, Yunjun Cheng, Kun Zhu, Xianting Zhang, Dongmei Huang, Yuhua Li, Jijun He, Qiang Wu, Binbin Yan, Kuiru Wang, Xian Zhou, Keping Long, Feng Li, Qian Li, Shaokang Wang, Jinhui Yuan, Ping-Kong Alexander Wai, and Sailing He

χ(3) nonlinearity enables ultrafast femtosecond scale light-to-light coupling and manipulation of intensity, phase, and frequency. χ(3) nonlinear functionality in micro- and nano-scale photonic waveguides can potentially replace bulky fiber platforms for many applications. In this review, we summarize and comment on the progress on χ(3) nonlinearity in chip-scale photonic platforms, including several focused hot topics such as broadband and coherent sources in the new bands, nonlinear pulse shaping, and all-optical signal processing. An outlook of challenges and prospects on this hot research field is given at the end.

2021-01-14 PIER Vol. 170, 1-15, 2021. doi:10.2528/PIER20112306

Designing Nanoinclusions for Quantum Sensing Based on Electromagnetic Scattering Formalism (Invited Paper)

Constantinos Valagiannopoulos

Quantum interactions between a single particle and nanoinclusions of spherical or cylindrical shape are optimized to produce scattering lineshapes of high selectivity with respect to impinging energies, excitation directions and cavity sizes. The optimization uses a rigorous solution derived via electromagnetic scattering formalism while the adopted scheme rejects boundary extrema corresponding to resonances that occur outside of the permissible parametric domains. The reported effects may inspire experimental efforts towards designing quantum sensing systems employed in applications spanning from quantum switching and filtering to single-photon detection and quantum memory.