Enhanced mid-infrared gas absorption spectroscopic detection using chalcogenide or porous germanium waveguides
Different integrated photonic sensors are investigated for the detection in the mid-infrared
region of the two gases namely CO 2 and CH 4. The three studied structures are ridge …
region of the two gases namely CO 2 and CH 4. The three studied structures are ridge …
Mid-infrared quasi-BIC resonances with sub-wavelength slot mode profiles in germanium-based coupled guided-mode resonance structures
We experimentally demonstrate a novel quasi-bound state in the continuum (BIC)
resonance in the mid-infrared wavelength region with the resonant electric field confined as …
resonance in the mid-infrared wavelength region with the resonant electric field confined as …
Mid‐Infrared Off‐Axis Resonant Mode Hybridization in Amorphous Silicon Sub‐Wavelength Grating Structures
In this study, the off‐axis excited guided‐mode resonance (GMR) hybridization is
experimentally investigated in one dimensional (1D) partially etched amorphous silicon (a …
experimentally investigated in one dimensional (1D) partially etched amorphous silicon (a …
High-quality large-scale electron-beam-written resonant filters for the long-wave infrared region
N Gupta, J Song - Optics Letters, 2021 - opg.optica.org
We present new, to the best of our knowledge, large-scale, high-quality spectral filters
operating in the long-wave infrared (LWIR) spectral region. We employ high-spatial …
operating in the long-wave infrared (LWIR) spectral region. We employ high-spatial …
Resonant mode engineering in silicon compatible multilayer guided-mode resonance structures under Gaussian beam excitation condition
In this work we present detailed electromagnetic design, fabrication, and experimental study
of silicon-compatible, step-index, multilayer guided-mode resonance structures. The …
of silicon-compatible, step-index, multilayer guided-mode resonance structures. The …
Polarization-independent high contrast grating 1300 nm dot-in-a-well InAs quantum-dot VCSEL
High contrast grating (HCG) 1300 nm InAs/GaAs quantum dot (QD) vertical-cavity surface-
emitting laser (VCSEL) has been introduced in this manuscript and the impact of device …
emitting laser (VCSEL) has been introduced in this manuscript and the impact of device …
Polarization independent electron-beam written 2-D longwave infrared guided-mode resonant filters
N Gupta, J Song - Optics Continuum, 2023 - opg.optica.org
We fabricated guided mode resonance filters (GMRFs) with two-dimensional (2-D) gratings
operating in the 8 to 12 µm long-wave infrared (LWIR) region by depositing amorphous …
operating in the 8 to 12 µm long-wave infrared (LWIR) region by depositing amorphous …
Binary Dispersion Formulations of Mid-Infrared Lossless Dielectric Contrast Gratings
The Zero Contrast Grating (ZCG) is a promising candidate for moded and dispersive mid-
infrared (MIR) photonics for its broadband transmittance and reflectance greater than 99.9 …
infrared (MIR) photonics for its broadband transmittance and reflectance greater than 99.9 …
Longwave infrared polarization independent monolithic guided-mode resonance filters with double-sided orthogonal linear gratings
N Gupta, J Song - Optics Continuum, 2022 - opg.optica.org
We present novel polarization independent, high-quality monolithic spectral filters based on
the guided-mode resonance (GMR) effect with orthogonal linear gratings on either side of …
the guided-mode resonance (GMR) effect with orthogonal linear gratings on either side of …
Improving transmittance of long-wave infrared guided-mode resonant filters
N Gupta, J Song - Optical Engineering, 2023 - spiedigitallibrary.org
The long-wave infrared (LWIR) spectral region spanning from 8 to 12 μm is useful for many
scientific and industrial applications. Many of these applications require use of either a …
scientific and industrial applications. Many of these applications require use of either a …