Browsing by Author "Su, KW"

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An assessment of single-electron effects in multiple-gate SOI MOSFETs with 1.6-nm gate oxide near room temperature
(2006-03-01)
Lee, W
;
Su, P
;
Chen, HY
;
Chang, CY
;
Su, KW
This letter provides an assessment of single-electron effects in ultrashort multiple-gate silicon-on-insulator (SOI) MOSFETs with 1.6-nm gate oxide. Coulomb blockade oscillations have been observed at room temperature for gate bias as low as 0.2 V. The charging energy, which is about 17 meV for devices with 30-nm gate length, may be modulated by the gate geometry. The multiple-gate SOI MOSFET, with its main advantage in the suppression of short-channel effects for CMOS scaling, presents a very promising scheme to build room-temperature single-electron transistors with standard silicon nanoelectronics process.
Compact efficient diode-pumped Nd : YVO4 Q-switched blue laser with intracavity frequency tripling
(2005-08-01)
Chen, YF
;
Chen, YS
;
Ou, TH
;
Su, KW
;
電子物理學系
We demonstrate a compact efficient diode-pumped acousto-optically Q-switched intracavity-frequency-tripled Nd:YVO4 blue laser. The optimum polarization state is experimentally investigated to optimize the output performance. Greater than 280 mW of 447-nm average power at a repetition rate of 25 kHz was generated with a 15-W diode pump power. At 25 kHz, the pulse width is shorter than 15 ns and the peak power is higher than 800 W.
Devil's staircase in three-dimensional coherent waves localized on Lissajous parametric surfaces
(2006-06-02)
Chen, YF
;
Lu, TH
;
Su, KW
;
Huang, KF
;
電子物理學系
We experimentally demonstrate the significance of the longitudinal-transverse coupling in the mesoscopic regime by using a high-Q laser resonator as an analog experiment. The longitudinal-transverse coupling is found to lead to the three-dimensional (3D) coherent waves that are localized on the parametric surfaces with Lissajous transverse patterns. More strikingly, experimental results reveal that the mode locking of the 3D coherent states forms a nearly complete Devil's staircase with the hierarchical ordering.
Efficient diode-pumped actively Q-switched Nd : YAG/BaWO4 intracavity Raman laser
(2005-12-15)
Chen, YF
;
Su, KW
;
Zhang, HJ
;
Wang, JY
;
Jiang, MH
Barium tungstate (BaWO4) is employed to achieve efficient stimulated Raman scattering conversion in a compact diode-pumped actively Q-switched Nd:YAG laser. With an incident pump power of 9.2 W, 1.56 W of 1181 nm first-Stokes average output power was generated at a pulse repetition rate of 20 kHz, corresponding to an optical-to-optical conversion efficiency of 16.9%. (c) 2005 Optical Society of America
High-peak-power AlGaInAs quantum-well 1.3-mu m laser pumped by a diode-pumped actively Q-switched solid-state laser
(2006-07-01)
Su, KW
;
Huang, SC
;
Li, A
;
Liu, SC
;
Chen, YF
We report a room-temperature high-peak-power AlGaInAs 1.36 mu m TEMOO laser pumped by a diode-pumped actively Q-switched Nd:YAG 1.06 mu m laser. With an average pump power of 1.0 W, an average output power of 140 mW was obtained at a pulse repetition rate of 10 kHz. With a peak pump power of 8.3 kW, the highest peak output power was 1.5 kW at a pulse repetition rate of 5 kHz. (c) 2006 Optical Society of America.
High-power efficient tunable Nd : GdVO4 laser at 1083 nm
(2005-08-15)
Chen, YF
;
Ku, ML
;
Su, KW
;
電子物理學系
;
Department of Electrophysics
An efficient tunable diode-pumped Nd:GdVO4 laser at 1083 nm has been constructed by suppressing the higher gain transition near 1063 nm. With 12.5 W diode pump power, the free-running output power centered about 1083 nm was up to 3.4 W, corresponding to an optical-to-optical conversion efficiency of 30.1%. When a simple uncoated etalon was used as a wavelength-selective element, the output power at each helium transition was higher than 2.5 W. (c) 2005 Optical Society of America.
InAs/GaAs quantum-dot saturable absorber for a diode-pumped passively mode-locked Nd : YVO4 laser at 1342 nm
(2005-06-15)
Su, KW
;
Lai, HC
;
Li, A
;
Chen, YF
;
Huang, KE
We report that lnAs/GaAs quantum dots were developed to be saturable absorbers as well as output couplers in diode-pumped passively mode-locked Nd:YVO4 lasers at 1342 nm. With an incident pump power of 12.6 W, an average output power of 0.85 W with a mode-locked pulse width of 26 ps at a repetition rate of 152 MHz was obtained. (c) 2005 Optical Society of America
InAs/GaAs quantum-dot saturable absorbers for diode-pumped passively Q-switched Nd-doped 1.3-mu m lasers
(2005-03-01)
Lai, HC
;
Li, A
;
Su, KW
;
Ku, ML
;
Chen, YF
Received August 6, 2004 A low-loss semiconductor saturable absorber based on InAs/GaAs quantum dots was developed for Q switching of a diode-pumped Nd-doped laser operating at 1.3 mum. With an InAs/GaAs quantum-dot saturable absorber, a diode-pumped Nd:YVO4 laser at 1342 nm. was achieved. With an incident pump power of 2.2 W, an average output power of 360 mW with a Q-switched pulse width of 90 ns at a pulse repetition rate of 770 kHz was obtained. (C) 2005 Optical Society of America
Inversion MOS capacitance extraction for ultra-thin gate oxide using BSIM4
(2005)
Lee, W
;
Su, KW
;
Chiang, CS
;
Liu, S
;
Su, P
Manifestation of weak localization and long-range correlation in disordered wave functions from conical second harmonic generation
(2006-01-27)
Chen, YF
;
Su, KW
;
Lu, TH
;
Huang, KF
;
電子物理學系
We experimentally demonstrate that the near-field patterns of conical second harmonic generation of a laser in random domain structures can be used to explore the spatial structure of two-dimensional disordered wave functions with weak localization. The statistics of the experimental near-field patterns agree very well with the theoretical distributions. In addition to the short-range correlation, the localization effects are found to contribute a nearly constant value to the long-range correlation. The result of this Letter also confirms the possibility of using conical second harmonic generation as a diagnostic tool for topographical characterization of crystals.
Quantum signatures of nonlinear resonances in mesoscopic systems: Efficient extension of localized wave functions
(2005-11-01)
Chen, YF
;
Lu, TH
;
Su, KW
;
Huang, KF
;
電子物理學系
We investigate the quantum signatures of classical nonlinear resonances by making the analytic connection between the quantum wave functions and the classical periodic orbits for the uncoupled systems. It is found that the highly efficient extension of the localized coherent states within the classical caustics is an intriguing phenomenon in mesoscopic systems with nonlinear resonances. With the theoretical analysis, we experimentally demonstrate that the laser resonator with an intracavity saturable absorber can be employed to visualize the wave patterns analogous to the quantum wave functions associated with Fermi resonance.