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Optical Clearing of the Mouse Central Nervous System Using Passive CLARITY

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On-chip passive optical diode with low-power consumption.

Li Liu, Jin Yue, Xiaokang Fan

|January 16, 2019

Summary

We developed a silicon optical diode using microring resonators. This device achieves high nonreciprocal transmission ratios with low power, enabling advanced on-chip optical computing and logic gates.

Area of Science:

Photonics and optical engineering
Materials science
Nonlinear optics

Background:

Optical diodes are crucial for integrated photonic circuits.
Existing optical diodes often require high power consumption or complex fabrication.
Silicon photonics offers a promising platform for compact and efficient optical devices.

Purpose of the Study:

To demonstrate a novel all-silicon passive optical diode.
To achieve high nonreciprocal transmission ratios (NTRs) with low power consumption.
To explore the application of opto-mechanical microring resonators (MRRs) for optical signal processing.

Main Methods:

Fabrication of opto-mechanical microring resonators (MRRs) with removed oxide substrates.
Utilizing nonlinear effects in free-hanging silicon waveguides activated by low optical powers.

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Exploiting asymmetric resonance red-shifts in cascaded MRRs for diode operation.

Main Results:

Demonstration of an all-silicon passive optical diode.
Achieved a high NTR of 33.6 dB at an input power of 0.96 dBm.
Obtained a 20-dB bandwidth of 0.11 nm.

Conclusions:

The proposed optical diode offers CMOS-compatibility, a compact footprint, and low power consumption.
The device exhibits high NTRs, making it suitable for on-chip signal processing.
Potential applications include optical logic gates and optical computing systems.