Session Index

S1. Nanophotonic Materials and Devices

Nanophotonic Materials and Devices VI
Sunday, Dec. 3, 2023  09:00-11:00
Presider: Prof. Jung-Yao Chen (National Cheng Kung University, Taiwan) Prof. Yu-Ju Hung (National Sun Yat-sen University, Taiwan)
Room: 92119 (靄雲廳) (1F)
09:00 - 09:15
Manuscript ID.  0943
Paper No.  2023-SUN-S0106-O001
Chi-Hsuan Chien Design of Tunable Lasers with External-Cavity Double Ring Resonators
Kai-Chun Ma, Chi-Hsuan Chien, San-Liang Lee, National Taiwan University of Science and Technology (Taiwan)

To realize a stable and widely tunable laser for applications in optical communication and sensing systems, we design and optimize a wavelength tunable laser forming with a gain chip and a silicon-photonics dual-ring resonator as an external cavity. The dual ring resonators have different free spectral ranges to employ the Vernier effect to enlarge the wavelength tuning ranges. The simulation indicates that the dual-ring resonator-based tunable laser achieves a wavelength tuning range of 77.67 nm, with a minimum side-mode suppression ratio (SMSR) exceeding 35 dB and an average SMSR of 43.8 dB.

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09:15 - 09:30
Manuscript ID.  0952
Paper No.  2023-SUN-S0106-O002
Tzu-Wei Yeh Nanotransfer Printing of Aluminum Metasurfaces: A Cost-Effective Approach to Near-Infrared Cut-off Filter
Tzu-Wei Yeh, Yu-Heng Hung, National Cheng Kung University (Taiwan); Chi-Sheng Chung, Shao-Jen Yeh, ASE Group (Taiwan); Hsin-Ying Lee, Chun-Hung Lin, National Cheng Kung University (Taiwan)

This work employed nanotransfer printing (nTP), a simple method for fabricating plasmonic color filters. We employed e-beam deposition and nTP to transfer the metal array. Furthermore, by undergoing two rounds of nTP, we successfully accomplished the fabrication of a 3D metasurface with a straightforward and efficient approach. The optical properties of the fabricated plasmonic color filters were evaluated through simulation and experiment. We believe that nTP is a promising technique for metallic patterning, offering a viable approach for the fabrication of plasmonic metasurfaces.

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09:30 - 09:45
Manuscript ID.  0194
Paper No.  2023-SUN-S0106-O003
Olena Vertsanova The powerful imaging and nanofabrication performance of Zeiss Crossbeam for nanophotonic materials research
Olena Vertsanova, Carl Zeiss Microscopy GmbH (Germany), National Technical University of Ukraine “KPI” (Ukraine); Benjamin Tordoff, Carl Zeiss Microscopy GmbH (Germany); Feng Lin Ng, Carl Zeiss Pte. Ltd (Singapore)

The electron microscopy techniques for nanofabrication and study of nanomaterials for photonics application are presented. New Zeiss solutions allow not only to produce of periodic nanostructures in different materials, but also to visualize the structure with high resolution during the process of nanofabrication. The benefits of Gemini electronic optics for high quality imaging and Ion-sculptor FIB column for sample preparation and nanostructuring are demonstrated.

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09:45 - 10:00
Manuscript ID.  1070
Paper No.  2023-SUN-S0106-O004
Li-Ming Chiang Improved Film Quality and Optical Characteristics of Qausi-2D Layered Perovskite Through Solvent Engineering Technique
Li-Ming Chiang, National Yang Ming Chiao Tung University (Taiwan), Academia Sinica (Taiwan); Tsung-Sheng Kao, National Yang Ming Chiao Tung University (Taiwan); Min-Hsiung Shih, Academia Sinica (Taiwan)

We explore a solvent engineering approach to enhance the quality and optical performance of quasi-2D perovskite thin films. By optimizing the ratio of γ-butyrolactone (GBL) and dimethyl sulfoxide (DMSO) in the solvent mixture and carefully controlling the timing of antisolvent dripping, we successfully synthesized quasi-2D perovskite thin films based on BA2PbI4 films with a surface coverage exceeding 98%. This method resulted in an increased absorption rate and improved photoluminescence emission. These findings can potentially be applied to enhance the optoelectronic properties of other 2D perovskite materials, making them promising candidates for use in light-emitting devices and energy-harvesting components.

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10:00 - 10:15
Manuscript ID.  0415
Paper No.  2023-SUN-S0106-O005
Yu-Hung Peng A study on the structure and electrical property of In6Se7:P compounds grown by chemical vapor transport
Yu-Hung Peng, Ching-Hwa Ho, National Taiwan University of Science and Technology (Taiwan)

This study presents the synthesis and characterization of previously unexplored In6Se7 crystals, a III-VI class compound semiconductor with potential optoelectronic applications. In6Se7 crystals were grown using CVT method with ICl3 as transport agent. Structural analysis and the effects of P content on electrical properties were investigated, providing valuable insights into this field. EDS mapping and TEM confirm the high-quality of In6Se7:P crystals, while XRD and Raman reveal monoclinic crystal structure. In6Se7:P exhibit n-type behavior likely due to P-Se bonds. The work function of P-doped In6Se7 was measured, and P dopants are considered suitable donor-type impurities for future In6Se7 device applications.

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10:15 - 10:30
Manuscript ID.  0613
Paper No.  2023-SUN-S0106-O006
Xue-Shun Lee Combing a metasurface and a liquid crystal module to achieve a full-color reflective display
Tsung-Yu Huang, Xue-Shun Lee, Ming Chi University of Technology (Taiwan)

In recent years, the concept of using metasurfaces integrated liquid crystals to achieve active control of hue has become increasingly important. However, this method lacked the ability to adjust brightness, limiting its practical applicability. In this study, we aim to design three metamaterial perfect absorbers as metasurfaces, combined with a liquid crystal module. These metamaterial perfect absorbers will correspond to one of the primary colors (red, blue, and green) and black, for two different polarization directions. By utilizing the liquid crystal module to rotate the incident light's polarization direction, we can adjust both the displayed hue and brightness.

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10:30 - 10:45
Manuscript ID.  0087
Paper No.  2023-SUN-S0106-O007
Yi-Jie Wang Enhanced Efficiency of Large-Area Photoconductive Emitters through Plasmonic Contact and Electrodes Design
Yi-Jie Wang, Pin-Han Lee, Pouya Torkaman, Shang-Hua Yang, National Tsing Hua University (Taiwan)

In this study, we propose a novel design for large-area photoconductive emitters using plasmonic contact electrodes. Our optimized design incorporates superlattices made of InGaAs and InAlAs materials, enabling efficient terahertz (THz) generation and detection. By enhancing carrier separation and acceleration within the device, we achieve significantly higher optical-to-terahertz conversion efficiencies compared to conventional designs. Furthermore, we comprehensively analyze the impact of electrode parameters, including individual pairs, emitter density, and exposed semiconductor area, on the emission efficiency. Our findings pave the way for advancements in THz technology, offering promising prospects for various applications in terahertz generation and detection systems.

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10:45 - 11:00
Manuscript ID.  1036
Paper No.  2023-SUN-S0106-O008
Sheng-Wei Kao Multiple toroidal dipole bound states in the continuum in dielectric metasurfaces
Sheng-Wei Kao, Ruey-Lin Chern, National Taiwan University (Taiwan)

We investigate the bound states in the continuum (BICs) in dielectric metasurfaces consisting of square patches deposited on a dielectric substrate. Symmetric-protected BICs occur at the Brillouin zone center, which are associated with extremely large quality factors and small linewidths. In particular, the BICs are identified as toroidal dipole (TD) modes characterized by the electric or magnetic fields bend into a torus, with the magnetic or electric circling around the surface. Both the electric or magnetic TDs are gathered in the unit cell to form the multiple TD modes.

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