Guided and defect modes in periodic dielectric waveguides. Mode-order converter in a multimode waveguide. Demonstrations of systematic photonic crystal design and optimization by low rank adjustment: an extremely compact mode separator. Changing the colour of light in a silicon resonator. In an optical network, isolators are an essential component used to suppress back-reection, and hence interference between dif-ferent devices. Computational Electrodynamics: The Finite-Difference Time-Domain Method 2nd edn (Artech House, 2000). 13.3 Photonic Transition for Integrated Optical Isolator In this section, we use the photonic transition described in the previous section to achieve on-chip optical isolation. Wavelength conversion via dynamic refractive index tuning of a cavity. Reversed Doppler effect in photonic crystals. Lasers 986 (University Science Books, 1986). Optical Resonances Created by Photonic Transitions. Electro-optic frequency modulation in optical resonators. Optical isolator is proposed for optoelectronic chip integration. Non-magnetic 30 dB integrated optical isolator in III/V material. All-optical diode in a periodically poled lithium niobate waveguide. Nonlinear photonic microdevices for optical integration. Applications of magneto-optical waveguides in integrated optics: review. A nanomagnetic route to bias-magnet-free, on-chip Faraday rotators. Magneto-optical nonreciprocal phase shift in garnet/silicon-on-insulator waveguides. Inducing photonic transitions between discrete modes in a silicon optical microcavity. Interband transitions in photonic crystals. All-optical control of light on a silicon chip. Silicon Photonics (Springer, 2004).Īlmeida, V. Enhancement of nonlinear effects using photonic crystals. This work demonstrates that on-chip isolation can be accomplished with dynamic photonic structures in standard material systems that are widely used for integrated optoelectronic applications. We further show that a non-reciprocal effect can be accomplished in dynamically modulated micrometre-scale ring-resonator structures. Based on the effects of photonic transitions 5, 6, we show here that a linear, broadband and non-reciprocal isolation can be accomplished by spatial–temporal refractive index modulations that simultaneously impart frequency and wavevector shifts during the photonic transition process. Until now, there have been no techniques that provide complete on-chip signal isolation using materials or processes that are fundamentally compatible with silicon CMOS processes. The need to overcome this difficulty is becoming increasingly urgent, especially with the emergence of silicon nano-photonics 2, 3, 4, which promises to create on-chip optical systems at an unprecedented scale of integration. Achieving on-chip optical signal isolation is a fundamental difficulty in integrated photonics 1.
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