With extreme field confinement in an ultrathin conducting layer, plasmons in 2D materials exhibit strong light-matter interactions, enabling the exploration of molecular vibration modes, specifically in infrared (IR) absorption spectroscopy. However, since high sensitivity in plasmons often results in a shorter resonant bandwidth, detecting molecular fingerprints across a broadband spectrum becomes fundamentally limited. Here, we demonstrate broadband surface-enhanced IR absorption (SEIRA) spectroscopy using a 2D materials-based gap plasmon resonator, specifically adopting Ti3C2Tx MXene. Within the MXene(Ti3C2Tx)-insulator(SiO2)-metal(Au) nanostructures, the MXene-based gap plasmon (MGP) modes are produced across the entire mid-IR spectrum. These modes exhibit a wavelength reduced by more than ten-fold compared to the wavelength in a vacuum, amplifying the light-matter interactions. Furthermore, using the MGP resonator, we demonstrate sensing of vibrational mode in polymethylmethacrylate (PMMA). This finding reveals that the MGP resonator can sensitively detect molecular fingerprints of the PMMA across the entire MIR range. Notably, the MGP resonator can also identify C-H bonding in the SWIR range, a detection that is challenging for other 2D material plasmonic devices. Our findings pave the way for developing sensitive sensors for the broadband spectrum and other optical applications in the SWIR range.
Thermal camouflage enables the object to be invisible from infrared detection system, by assimilating their thermal radiation (TR) signal into surroundings. While extremely low TR is required for thermal camouflage of a high temperature object, proposed materials is still limited in engineering emissivity, not controlling surface temperature for TR suppression. Here, we propose a titanium carbide (MXene) based selective emitter (SE) for suppression of TR. With reducing thermal conductivity of MXene, designed SE exhibits low surface temperature even for a few micron thickness. Additionally, with interference effects in multilayer systems, designed SE show radiative cooling effects for additional TR reduction.
In plasmonic lithography, when using a scanning probe in contact mode, degradation of the line pattern quality occasionally occurs due to variations of probe tip velocity or a stick/slip motion. To avoid poor pattern quality caused by such variations in probe tip motion, we analyzed the motion of the probe tip by using a frictional model based on conventional contact mechanics. The motion of the probe tip was numerically analyzed in terms of adhesion force and probe velocity, which are the dominant factors in micro/nanoscale motion. It was found that stick/slip spacing has a roughly positive relationship with the maximum adhesion force between the substrate and probe tip, and a negative relationship with the probe velocity. Combining the probe tip motion with the exposure model of a near-field wave, we analyzed the quality of line patterns that resulted from various stick/slip spacing in terms of line-edge roughness.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.