Nanophotonics, manipulating light–matter interactions at the nanoscale, is an appealing
technology for diversified biochemical and physical sensing applications. Guided-wave …

Optical devices are necessary to meet the anticipated future requirements for ultrafast and
ultrahigh bandwidth communication and computing. All optical information processing can …

Silicon has been the material of choice of the photonics industry over the last decade due to
its easy integration with silicon electronics, high index contrast, small footprint, and low cost …

We present several fundamental photonic building blocks based on suspended silicon
waveguides supported by a lateral cladding comprising subwavelength grating …

Mid-infrared absorption spectroscopy is highly relevant for a wide range of sensing
applications. In this letter, we demonstrate a Fourier-transform spectrometer chip based on …

The availability of silicon photonic integrated circuits (ICs) in the 2–4 μm wavelength range
enables miniature optical sensors for trace gas and bio-molecule detection. In this paper, we …

Germanium based photonic devices can play a significant role in several applications,
particularly in the so-called fingerprint wavelength region. Here, we review our recent results …

We report transmission measurements of germanium on silicon waveguides in the 7.5–8.5
μm wavelength range, with a minimum propagation loss of 2.5 dB/cm at 7.575 μm. However …

The InSb photodetector on a Si substrate acts as a signal receiver for the mid-infrared silicon
photonics application to overcome the limitation of group IV semiconductors. In this paper …

In recent years, sensing and communication applications have fueled important
developments of group-IV photonics in the mid-infrared band. In the long-wave range, most …