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All Journal Omega: Jurnal Fisika dan Pendidikan Fisika INDONESIAN JOURNAL OF APPLIED PHYSICS Indonesian Journal of Chemistry Risalah Fisika
Juliasih Partini
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Gadjah Mada, Sekip Utara BLS 21, Yogyakarta 55281, Indonesia
Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology Physics Other

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Journal : INDONESIAN JOURNAL OF APPLIED PHYSICS

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Pembangkitan Terahertz pada Metamaterial Chiral Menggunakan Spektroskopi Emisi Terahertz Partini, Juliasih; Widiatmono, Restu
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 9, No 02 (2019): IJAP Volume 9 ISSUE 02 YEAR 2019
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (743.868 KB) | DOI: 10.13057/ijap.v9i2.32438

Abstract

Metamaterial adalah material buatan dengan indeks bias negatif dan secara simultan memiliki permitivitas elektrik dan permeabilitas magnetik bernilai negatif. Pengembangan metamaterial mengalami terobosan dengan munculnya struktur metamaterial baru yang disebut sebagai metamaterial struktur chiral sebagai sumber radiasi terahertz (THz). Pengukuran sinyal emisi THz dilakukan menggunakan sistem spektroskopi emisi terahertz dengan sistem laser Ti:Sapphire femtosekon sebagai sumber radiasi. Sampel metamaterial chiral dengan ukuran panjang 1,2 mm, lebar 0,3 mm dan kedalaman 0,3 mm susunan 300 struktur dengan arah putar kanan dan putar kiri. Kedua sampel mampu membangkitkan emisi gelombang THz dalam jangkau frekuensi 0 - 2,24 THz. Proses rektifikasi optik diperlihatkan oleh adanya pembangkitan gelombang THz pada sampel metamaterial chiral oleh laser femtosekon. Hasil eksperimen memperoleh hubungan kuadratik antara energi laser pemompa dengan amplitudo gelombang THz. Hal ini dapat disimpulkan bahwa metamaterial chiral persegi dengan kedalaman berbeda telah berhasil membangkitkan emisi gelombang THz yang terpolarisasi eliptik.
Kajian Gejala Penyearahan Optik pada Metamaterial Chiral Juliasih Partini; Kamsul Abraha; Arief Hermanto; Satoshi Tomita; Matsui Takahiro
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): IJAP Volume 04 Issue 02 Year 2014
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i02.4980

Abstract

Chiral metamaterial is a new breakthrough in the fabrication of a metamaterial because of the capability of providing different refractive index values for each circular polarization angle. This provides opportunities to obtain negative refractive index values, without the necessity to have simultaneously negative values for both permittivity and permeability. This study investigated the optical rectification, which is the phenomenon of second order non-linear optics in the chiral metamaterial. This relates to the testing of the new designs of square structure chiral metamaterial. Optical rectification is often used to 'rectify' femtoseconds laser from the realm of visible light into the terahertz domain. Nonlinear response of metamaterial was observed by terahertz emission spectroscopy. The results showed that the obtained terahertz signal is proportional to the square of the laser power used. This suggests that in theincoherent optical rectification, there is a mixture of optical rectification with the second harmonic wave generation. Development of square-structured chiral metamaterials is expected to be an alternative source of material due to the lack of non-linear material that can be used in the terahertz domain.
Co-Authors Al Fauzan, Muhammad Rifqi Arief Hermanto Fitri Puspasari Galih Setyawan Hidayat, Mirzanur Imam Fahrurrozi Kamsul Abraha Matsui Takahiro Muhammad Faruq Nuruddinsyah, Muhammad Faruq Nuruddinsyah, Muhammad Faruq Restu Widiatmono Satoshi Tomita Sholihun, Sholihun Trias Prima Satya