New Physics: Sae Mulli

Aims and Scope

The origin of New Physics: Sae Mulli (NPSM, ISO abbreviation: New Phys.: Sae Mulli.): Sae Mulli (새물리 in Korean characters means ‘new physics’) is the oldest Korean pure scientific journal. It was first published in 1961 just after the Korean War by the Korean Physical Society (KPS). The primary mission of Sae Mulli was to start building up Korean physics research community from almost nothing and in fact Sae Mulli had made tremendous contributions to the Korean science community. Through a peer-review system, Sae Mulli had continued elevating the level of scientific researches, consequently becoming a cornerstone of the economic miracle of Korea...

Editor-in-Chief : Sam Jin KIM
New Physics: Sae Mulli Editorial Board

pISSN : 0374-4914
eISSN : 2289-0041

Tel : +82-2-556-4737
Fax : +82-2-554-1643
E-mail: npsm@npsm-kps.org

Research Papers

Experimental Verification of the Effect of Photo-Excited Carrier Injection at Organic/Semiconductor Interfaces on Terahertz Wave Modulation

Joong Wook LEE*

Department of Physics and Optoelectronics Convergence Research Center, Chonnam National University, Gwangju 61186, Korea

We investigated the injection effect of photo-excited carriers at organic/semiconductor interfaces on the transmission modulation of terahertz (THz) waves. To systematically verify the relationship between the injection effect and the THz wave modulation, we employed Si and GaAs with different carrier recombination lifetimes as a semiconductor substrate and a trilayer system (organic/SiO$_2$/Si) with silicon dioxide as a spacer layer, respectively, to confirm the effect of blocking photo-excited carrier injection on the THz wave modulation. The experimental results clarify that the transmission modulation of the THz wave in organic/semiconductor hybrid structures is associated with the injection of carriers optically excited on the semiconductor substrate into the organic thin film.

New Phys.: Sae Mulli 2018; 68: 583-587

Quantum Characteristics of Spiral-Shaped Billiards

Sunghwan RIM¹, Tae-Yoon KWON², Jinhang CHO³, Eui-Soon YIM*⁴

¹ School of Electrical and Computer Science, Gwangju Institute of Science and Technology, Gwangju 61005, Korea

² Hanwha Corporation, Defense R&D Center, Daejeon 34060, Korea

³ Department of Physics, Sogang University, Seoul 04107, Korea

⁴ Department of Computer Applied Science, Semyung University, Jechon 27136, Korea

The statistical characteristics of the eigenvalues and the intensity patterns of the eigenfunctions of a spiral-shaped billiard are numerically investigated by using the finite-element method. Nearest-level spacing statistics and spectral rigidities are studied for three different values of the deformation parameter, and the results are compared with the predictions of random matrix theory. The intensity patterns of the eigenfunctions are also investigated in order to search for strongly localized intensity patterns. The level spacing statistics and the patterns of the eigenfunctions are in good agreement with the expectations; however, the spectral rigidity shows considerable deviations from the predictions of random matrix theory.

New Phys.: Sae Mulli 2018; 68: 557-562

New Phys.: Sae Mulli 2018; 68: 501~592

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Research Papers

Ostwald Ripening of the Air Bubbles in Liquid Crystals

Beom-Kyu LEE, Sung-Jo KIM, Jeong-Seon YU, Jong-Hyun KIM*

New Phys.: Sae Mulli 2018; 68: 501-507 https://doi.org/10.3938/NPSM.68.501