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Dr Bram Slagmolen (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
Newtonian noise, or gravitational fluctuations from local moving mass, is a low Fourier frequency noise source that will limit next-generation ground-based gravitational-wave detectors. At the Australian National University, we are developing an opto-mechanical torsion pendulum sensor for direct detection of Newtonian noise, consisting of two suspended orthogonal pendulums that rotate...
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Lane Scheel (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
The Torsion Pendulum Dual Oscillator (TorPeDO) experiment [1] aims to directly detect Newtonian noise, a fundamental limit to the low-frequency sensitivity of future terrestrial gravitational-wave detectors. TorPeDO employs a four-stage seismic isolation chain comprising an inverted pendulum, a vertical geometric anti-spring (GAS) filter, an intermediate mass, and a penultimate mass from which...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
This study investigates the applications of electromagnetic wave theory in antenna design and radio frequency (RF) engineering for modern wireless communication systems. Electromagnetic waves play a vital role in wireless technologies including 5G/6G communication, satellite systems, radar, Internet of Things (IoT), and software-defined radio (SDR). The research analyzes how wave properties...
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AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
After two black holes merge, the final black hole emits a ringdown signal composed of quasi-normal modes whose frequencies and decay times are set by its mass and spin. Measuring these modes tests general relativity in the strong-field regime, as the theory predicts a specific relationship between them.
Such tests rely on calibration, the conversion of the detector's raw output into...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The rapid advancement of integrated vacuum electronic systems is creating demand for electron sources that combine compactness, stability, and precise emission control while operating at low power. While conventional field emitters based on materials such as Si, Mo, W, LaB6, and carbon nanotubes (CNTs) have demonstrated emission capabilities, their vertical architecture and high-voltage...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Electric field induced second harmonic generation (EFISHG) is a powerful technique for investigating symmetry breaking in materials since it exclusively occurs in non-centrosymmetric media$^1$. This makes it a useful tool for probing charges at semiconductor interfaces, for example at silicon/dielectric boundaries$^2$ and in 2D materials$^3$. Similarly EFISHG is also effective at detecting...
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AIP | General Relativity and Gravitation (ASGRG)Invited talk
Black-hole horizons, the "surfaces of no return", lie at the intersection of general relativity and quantum theory, but they are extremely difficult to probe observationally. In this talk, I will present our analysis of GW250114, the loudest binary black-hole signal observed so far, and report observational evidence for a "direct wave" component associated with the newly formed black-hole...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Vacuum electronic devices offer unique advantages, including ballistic electron transport, high-frequency operation, and robustness under extreme environments. However, their practical implementation in miniaturized systems is often limited by high operating voltages and the need for complex strategies to control electron emission. Recently, light-assisted field emission has emerged as a...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Actively reconfigurable terahertz (THz) spectral components are required for adaptive spectroscopy, imaging, and wireless systems. However, achieving transmission filtering with substantial tunability in a compact planar architecture remains challenging. This work presents a microelectromechanical system (MEMS) reconfigurable bilayer THz metasurface bandpass filter based on the controlled...
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Mai Okumura (Chuo University)COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The development of high-performance Terahertz–Infrared (THz–IR) sensors is essential for next-generation non-destructive inspection. Photo-thermoelectric (PTE) sensors utilizing carbon nanotubes (CNTs) are promising due to their broadband response. However, achieving peak sensitivity requires matching the material's properties to the specific eigenfrequency of the inspection target. The...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
We investigate the linear and nonlinear photon-mixing response of nodal ring semimetals in the terahertz frequency regime. Using a theoretical framework, we demonstrate that these materials exhibit a remarkably strong third-order nonlinear current, which is significantly enhanced with increasing temperature and remains robust up to room temperature. The nonlinear response reaches a magnitude...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Silicon metal-oxide semiconductor (MOS) device structures are vital for realizing quantum computing devices based on single atoms acting as qubits in silicon. The atoms forming the qubits must be located within about 20 nm of the Si/SiO2 interface in these devices to allow control electrodes and read-out structures to work. [1] These qubits typically are based on storing quantum information in...
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
The Thermoradiative Diode (TRD) is a novel application of mid infrared semiconductors to generate power via radiative emission. Existing TRD research has established potential theoretical energy limits [MN1.1]for ideal TRD operation. Researchers have speculated on potential TRD applications covering the limitations of terrestrially mounted TRDs and their interaction with Earth’s atmosphere....
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COMMAD - Optoelectronic and Microelectronic Materials and DevicesPoster
Perovskite solar cells (PSCs) have become increasingly prominent as a promising route within the photovoltaics field owing to their attractive combination of cost-effective, high-power conversion efficiencies and tuneable bandgaps. Among them, carbon-based perovskite solar cells (C-PSCs) are rapidly gaining recognition as a highly exciting architecture for realizing low-cost, stable, scalable...
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Sheon Chua (Australian National University)AIP | General Relativity and Gravitation (ASGRG)Contributed Oral
In large optical systems, such as the Laser Interferometric Gravitational-wave Observatory (LIGO) [1], active seismic isolation is used to reduce the optical platform motion. However, inter-platform motion presents a significant noise challenge to the low frequency sensitivity of these instruments. Suspension platform interferometry (SPI) [2] provides a potential solution via the measurement...
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