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All Journal Interdisciplinary Social Studies COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Journal of Comprehensive Science
Gantada, Muhammad Satya Putra
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Humanities Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Public Health Social Sciences

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Journal : Journal of Comprehensive Science

 1 
Modulasi Elektro-Optik pada Struktur Hetero Kristal Fotonik Resonansi dengan Slot Berbahan Hybrid Silikon di Atas Isolator (SOI) dan Polimer Gantada, Muhammad Satya Putra; Wülbern, Jan Hendrik; Falco, Andrea Di
Journal of Comprehensive Science Vol. 4 No. 6 (2025): Journal of Comprehensive Science
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v4i6.3417

Abstract

Penelitian ini bertujuan untuk mengembangkan modulator elektro-optik berbasis struktur photonic crystal (PhC) bercelah yang terintegrasi dengan substrat silikon-on-insulator (SOI) dan polimer non-linear optik (NLO). Desain ini memungkinkan modulasi optik dengan kecepatan sangat tinggi dalam ukuran perangkat yang sangat kecil. Dengan memanfaatkan resonator heterostruktur PhC dua dimensi, medan optik diperkuat di dalam celah sempit yang meningkatkan interaksi antara cahaya dan medan listrik. Simulasi numerik menunjukkan bahwa desain ini dapat mencapai faktor kualitas (Q-factor) hingga 10.000, sementara hasil eksperimen menunjukkan Q-factor sekitar 2200. Modulasi elektro-optik dicapai dengan menerapkan medan listrik eksternal yang mengubah indeks bias polimer NLO di dalam celah, menghasilkan pergeseran posisi resonansi. Pengujian menunjukkan bahwa sinyal modulasi mengikuti pola linier (efek Pockels) dan kuadratik (efek Kerr listrik) terhadap medan listrik. Koefisien elektro-optik (r33) yang diperoleh dari pengukuran sekitar 9 pm/V, lebih rendah dari nilai polimer massal, yang diduga disebabkan oleh ketidaksempurnaan orientasi molekul dalam celah sempit. Selain itu, analisis kelistrikan perangkat menunjukkan bahwa kecepatan modulasi hingga 100 GHz dapat dicapai dengan optimasi resistivitas silikon melalui doping. Hasil ini menunjukkan potensi besar integrasi PhC bercelah dan polimer NLO dalam menghasilkan modulator elektro-optik yang sangat cepat, efisien, dan berukuran miniatur.
Utilization Of Used Pet, Hdpe, And Pp Plastics As Raw Materials For 3d Printing Filaments: A Comparative Study Of Mechanical Properties And Storage Resistance At Room Temperature Abinda, Azora Esya; Gantada, Muhammad Satya Putra
Journal of Comprehensive Science Vol. 4 No. 11 (2025): Journal of Comprehensive Science
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jcs.v4i11.3714

Abstract

This study investigates the feasibility of upcycling post-consumer polyethylene terephthalate (PET), high-density polyethylene (HDPE), and polypropylene (PP) wastes into 3D-printing filaments and comparatively evaluates their mechanical performance and storage durability at room temperature. Waste plastics were sorted, washed, dried, and extruded into 1.75 mm filaments under polymer-specific temperature profiles. Dimensional consistency was assessed through diameter measurements at multiple points, while tensile tests on filament specimens were conducted at 0, 30, 60, and 90 days of storage to determine ultimate tensile strength, elastic modulus, and elongation at break. The results show that all recycled filaments satisfy typical FDM dimensional tolerances, with rPET exhibiting the lowest coefficient of variation in diameter. At t = 0 days, rPET displays the highest tensile strength and modulus but the lowest ductility, rHDPE shows the highest ductility but lowest strength, and rPP presents intermediate behavior. During storage, all filaments undergo property degradation, yet with different rates: rPET retains ?90% of its initial strength and ?95% of its modulus after 90 days, whereas rHDPE and rPP experience larger reductions, particularly in ductility (to about 66–67% of their initial elongation at break). These findings demonstrate that common plastic wastes can be converted into technically viable FDM feedstock and reveal that rPET is the most robust option for applications requiring higher strength and longer shelf life, while rHDPE and rPP are better suited for flexible parts provided that storage conditions and inventory rotation are carefully controlled.
Co-Authors Abinda, Azora Esya Falco, Andrea Di Hasan Basri Saparin, Saparin Wijianti , Eka Sari Wülbern, Jan Hendrik Yudi Setiawan