http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
1차원 금속나노구조체에서 표면플라스몬을 이용한 광학장 제어
변지수(Clare C. Byeon),최수봉(Soo Bong Choi),박두재(DooJae Park),정문석(Mun Seok Jeong),김대식(D. S. Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
Plasmonics, utilizing the surface plasmons in metal nanostructure, is one of the key future technologies for developing ultra small and ultrafast devices. We have demonstrated the generation of surface plasmon polariton (SPP) in 1-dimensional periodic metal nano slit arrays and the directional control of SPP waves propagating through an asymmetric plasmonic Bragg resonator by femtosecond coherent control using femtosecond optical excitation.
Structural Dependency of the Optical Properties of Coupled GaAs Quantum Qots and Rings
이상조,김종수,Clare C. Byeon,강훈수,정문석,송진동,임재영,제구출,이상준,노삼규 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.3
By using droplet epitaxy, we fabricated asymmetrically-coupled GaAs quantum dot molecules (AQDMs) and symmetrically-coupled GaAs concentric quantum-double rings (SCQRs). The geometrical coupling distances, dot-to-dot for the AQDMs and ring-to-ring for the SCQRs, were 30 nm and 28 nm, respectively. The photoluminescence (PL) measurement was performed with a femtosecond laser as an excitation source to investigate the structure-dependent optical properties of the AQDMs and the SCQRs as functions of the excitation intensity (corresponding to the injection carrier density). The excitation-power-dependent PL showed that the emission peak of the AQDMs was systemically red-shifted with increasing excitation intensity while the emission peak of the SCQRs was blue-shifted. The anomalous behavior in the shift of the emission peak for the AQDMs can be explained by using the inhomogeneous carrier distribution due to the geometrical asymmetry of the coupled QDs.
Fabrication of coupled GaAs quantum dots and their optical properties
Kim, Jong Su,Song, Jin Dong,Byeon, Clare C.,Kang, Hoonsoo,Jeong, Mun Seok,Cho, Nam Ki,Park, Sung Jun,Choi, Won Jun,Lee, Jung Il,Kim, Jin Soo,Leem, Jae-Young,Yim, Sang-Youp,Ko, Do-Kyeong,Lee, Jongmin Wiley (John WileySons) 2009 Physica Status Solidi C Vol.6 No.4
Choi, SooBong,Park, DooJae,Lienau, C.,Jeong, Mun Seok,Byeon, Clare C.,Ko, Do-Kyeong,Kim, D. S. The Optical Society 2008 Optics express Vol.16 No.16
<P>We demonstrate spatial control of optical near-fields by femtosecond phase shaping in one-dimensional plasmonic structures. The near-field images display striking temporal-phase dependence, switching between double- and single-peak images within one lattice constant. The change of the near-field distribution is studied in the time and spectral domain. The spectral composition change observed by varying the time delay between two phase-locked femtosecond pulses explains the spatial control of the near-field images. Modal expansion calculations of linear light transmission using the surface impedance boundary condition are in excellent agreement with experiments.</P>
Ok-Hwan Cha,Mun-Seok Jeong,Clare C. Byeon,Hyun Jeong,Jong-Hun Han,Young-Chul Choi,Kay-Hyeok An,Kyung-Hui Oh,Ki-Kang Kim,Young-Hee Lee 한국탄소학회 2009 Carbon Letters Vol.10 No.1
We propose an evaluation method of the relative content of single-walled carbon nanotubes (SWCNT) in SWCNT soot synthesized by arc discharge using UV-VIS-NIR absorption spectroscopy. In this method, we consider the absorbance of semiconducting and metallic SWCNTs together to calculate the relative content of SWCNTs with respect to a highly purified reference. Our method provides the more reliable and realistic evaluation of SWCNT content with respect to the whole carbonaceous content than the previously reported method.
Triplet Exciton and Polaron Dynamics in Phosphorescent Dye Blended Polymer Photovoltaic Devices
Lee, Chang‐,Lyoul,Hwang, In‐,Wook,Byeon, Clare Chisu,Kim, Bok Hyeon,Greenham, Neil C. WILEY‐VCH Verlag 2010 Advanced Functional Materials Vol.20 No.17
<P><B>Abstract</B></P><P>The triplet exciton and polaron dynamics in phosphorescent dye (PtOEP) blended polymer (MEH‐PPV) photovoltaic devices are investigated by quasi‐steady‐state photo‐induced absorption (PIA) spectroscopy. According to the low‐temperature PIA and photoluminescence (PL) results, the increase in strength of the triplet‐triplet (<I>T</I><SUB>1</SUB>‐<I>T<SUB>n</SUB></I>) absorption of MEH‐PPV in the blend system originates from the triplet‐triplet energy transfer from PtOEP to MEH‐PPV. The PtOEP blended MEH‐PPV/C<SUB>60</SUB> bilayer photovoltaic device shows a roughly 30%–40% enhancement in photocurrent and power‐conversion efficiency compared to the device without PtOEP. However, in contrast to the bilayer device results, the bulk heterojunction photovoltaic devices do not show a noticeable change in photocurrent and power‐conversion efficiency in the presence of PtOEP. The PIA intensity, originating from the polaron state, is only slightly higher (within the experimental error), indicating that carrier generation in the bulk heterojunction is not enhanced in the presence of PtOEP. The rate and probability of the exciton dissociation between PtOEP and PCBM is much faster and higher than that of the triplet‐triplet energy transfer between PtOEP and MEH‐PPV.</P>
Choi, Won Il,Kim, Ja-Young,Kang, Chul,Byeon, Clare C.,Kim, Young Ha,Tae, Giyoong American Chemical Society 2011 ACS NANO Vol.5 No.3
<P>We developed a very effective hyperthermia system for successful photothermal cancer therapy. Instead of applying individual gold nanorods (GNRs) that can absorb NIR light, GNRs were loaded into functional nanocarriers that could provide stable storage of GNRs and selective delivery to a target tumor site. The functional nanocarriers (chitosan-conjugated, Pluronic-based nanocarriers) were prepared by chemically cross-linking Pluronic F 68 with chitosan conjugation to form a flexible, soft, and excellent reservoir for biomacromolecules as well as tumor targeting. <I>In vivo</I> characteristics of the nanocarriers including a long circulation time, a good tumor accumulation, and low liver uptake were previously characterized by us. When GNRs were delivered by using these nanocarriers, much enhanced <I>in vitro</I> cellular uptake and a photothermal effect were observed for a cancer cell line. More importantly, an intravenous injection of this system followed by NIR laser irradiation to the tumor site resulted in a very efficient thermolysis <I>in vivo</I>. Thus, apparently complete tumor resorption was achieved without damage to the surrounding tissue, suggesting a promising candidate for clinical phototherapeutic applications.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2011/ancac3.2011.5.issue-3/nn103047r/production/images/medium/nn-2010-03047r_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn103047r'>ACS Electronic Supporting Info</A></P>