Session Index

Quantum Electronics and Laser Technology

Poster Session I
Thursday, Dec. 7, 2017  12:30-14:00
Presider: -
Room: International Research Building 5F
Paper No.  2017-THU-P0301-P001
Yuan-Yao Lin Award Candidate Dynamic cavity effect in Topological Insulator Bi2Te3 based Passive Q-switched Solid State Laser
Wei-Heng Sung;Peng Lee;Yi-Ran Wang;Chao-Kuei Lee;Yuan-Yao Lin

Dynamic cavity effect of a Bi2Te3 based Passive Q-switched solid-state laser was investigated. With saturation intensity only few kW, Bi2Te3 serves a sensitive saturable absorber. A transition from Q-switched to Continuous-wave state was observed when the pumping increases which was explained by the modulation instability spectrum of laser rate equation.

Paper No.  2017-THU-P0301-P002
Jun-Ting Guo Award Candidate Voltage Controlled liquid crystal terahertz phase shifter with Mg doped CuCrO2 transparent electrodes
Jun-Ting Guo

In this work, optical properties of CuCrO2 at THz range was characterized. Compared to ITO, Mg:CuCrO2 exhibits the great performance not only in transmission and conductivity. Using Mg:CuCrO2 as electrode, we have successfully demonstrated an terahertz phase shifter. The transmission of 70% reveal Mg:CuCrO2 is a promising electrode material.

Paper No.  2017-THU-P0301-P003
Cho-Yen Tsai Award Candidate THz emission from InN thin films and pyramids by optically-pumping
Cho-Yen Tsai

THz emission mechanism from Indium Nitride is investigated by the setup of Time-Domain Spectroscopy (THz-TDS). In this work, by combining the Fresnel equation, free carrier absorption and nonlinear effect (Optical rectification), we can well explain pump incident angle, pump polarization angle and pump power dependence of THz electric field.

Paper No.  2017-THU-P0301-P004
Shang-Lin Yang Award Candidate Generation of non-Gaussian optical vortices pulse in a degenerate optical resonator with an intra-cavity spiral phase plate
Shang-Lin Yang;Hsien-Che Lee;Jhih-He Tu;Yuan-Yao Lin

We report the generation of Q-switched optical vortex pulses using a degenerate optical resonator with an intra-cavity spiral phase plate (SPP). Vortex pulse with wavefront dislocation mirroring the topological charge of the SPP was generated experimentally on diode-pumped solid state laser system using Nd:YAG crystal and Cr:YAG saturable absorber.

Paper No.  2017-THU-P0301-P005
Yao-Yu Hsu Award Candidate Photonic Crystal Circular Nanobeam Laser with Type-II GaSb/GaAs Quantum Rings
Yao-Yu Hsu;Chih-Chi Chang;Kung-Shu Hsu;Hsiang-Ting Lin;Chiao-Yun Chang;Wei-Hsun Lin;Shih-Yen Lin;Min-Hsiung Shih

Photonic crystal circular nanobeam cavity laser with type-II GaSb/GaAs quantum rings was demonstrated. The defect mode in the cavity exhibits small mode volume, high quality factor which lead to high efficient, low threshold lasing emission. The ultracompact laser would be the potential light sources in chip-scale optoelectronic integrate circuits.

Paper No.  2017-THU-P0301-P006
Chen-Yu Chang Award Candidate Study of surface state carriers and free carriers in topological insulators via mid-infrared spectroscopy
Chen-Yu Chang;Tien-Tien Yeh;Chih-Wei Luo;Fang Cheng Chou;Marin Mirtchev Gospodinov

We measure the reflectivity spectra of topological insulators Sb2Te3-xSex (x = 0-3) and Bi2Te3-xSex (x = 0-3) at various temperatures by Fourier-transform infrared spectroscopy (FTIR) in mid-infrared region. Through Drude model and Falkovsky’s model, the contributions of surface state carriers and free carriers in reflectivity spectra have been studied.

Paper No.  2017-THU-P0301-P007
Chao-Kuei Lee Award Candidate Thickness Dependent Optical Nonlinearity and Pulsed Solid State Laser by Bismuth Telluride Saturable Absorber
Peng Lee;Yi-Ran Wang;Wei-Heng Sung;Chao-Kuei Lee

In this work, the high quality few-layered Bismuth-Telluride absorbers with different dominant thickness was prepared to explore the optical nonlinearity properties. In addition, the Q-switched Nd:YAG laser using the prepared TISAs are also demonstrated, which showing that the TISAs saturation intensity engineering can be reached by controlling the TI morphology.

Paper No.  2017-THU-P0301-P008
Zhen-Ting Huang Award Candidate High-Resolution Sensors Based on ZnO Surface Plasmon Nanolasers
Zhen-Ting Huang;Pi-Ju Cheng;Bo-Tsun Chou;Yi-Cheng Chung;Yu-Hsun Chou;Chun-Tse Chang;Tien-Chang Lu;Kuo-Ping Chen;Tzy-Rong Lin

We propose hybrid plasmonic-photonic crystal nanolasers consisting of a nanowire lying on a nano-trenched film. The resonant cavity mode reaches an extremely narrow linewidth which satisfactory sensitivity at wavelength of 374 nm. Aiming at near-ultraviolet gas detection, the designed cavity sensors exhibit distinguished characteristics such as high resolution and sensitivity.

Paper No.  2017-THU-P0301-P009
Chao-Kai Wang Award Candidate Pulse-Shaped Ultrafast Erbium-Doped Fiber Laser and Applications
Chao-Kai Wang

Based on Freezing Phase Algorithm (FPA) [1], an ultrafast pulse shaping algorithms is proposed for achieving transform limited pulses by exploiting the nature of sinusoidal function. The Improved FPA (IFPA) can process 20.5 times faster than FPA. The pulse width measured after IFPA is 1.2 % wider than calculation.

Paper No.  2017-THU-P0301-P010
Yu Chen Chang Award Candidate Generation of 700W-level high-power continuous wave by an Yb-doped fiber laser
Yu Chen Chang

In this work, we designed and analyzed a 700W-level high power fiber laser.

Paper No.  2017-THU-P0301-P011
Tien-Tien Yeh Award Candidate Ultrafast carrier dynamics in topological insulators studied by ultrabroadband mid-infrared pump-probe spectroscopy
Tien-Tien Yeh;Wen Hao Lin;Chih-Wei Luo;Hideto Shirai;Takao Fuji;Cheng-Maw Cheng;Ku-Ding Tsuei;Takayoshi Kobayashi;Fang Cheng Chou;Marin Mirtchev Gospodinov

The ultrafast carrier dynamics in topological insulators (TIs) including Bi2Te3-xSex and Sb2Te3-xSex (x=0,1,2) was studied by 800-nm pump and ultrabroadband mid-infrared spectroscopy. By Drude and Falkovsky’s models, the ultrafast dynamics of bulk and surface carriers in TIs have been clearly revealed.

Paper No.  2017-THU-P0301-P012
Wei-Hsin Wu Award Candidate Generation of octave-spanning intense supercontinuum from Yb:doped solid- state lasers in multiple thin plates
Wei-Hsin Wu;Chih-Hsuan Lu; Kuo;Yi-Hsun Tseng;Chia-Lun Tsai;Shang-Da Yang;Ming-Chang Chen;A. H. Kung

We demonstrate generation of intense octave-spanning supercontinuum, covering from 550 nm to 1300 nm, in a double-stage multiple thin plate system driven by 1030 nm, 170 fs pulses. Such supercontinuum can support 3 fs single- cycle pulses for applications in bright isolated attosecond pulses generation and time-resolved spectroscopy.ㄒ

Paper No.  2017-THU-P0301-P013
Han-Wei Hsiao Award Candidate Development of Coupled NEGF-Poisson Solver with Scattering E ects in Nanowire Device
Han-Wei Hsiao;Yuh-Renn Wu

To investigate the carrier transport in nanoscale electronic devices, a self-consistent NEGF-Poisson solver which includes electron-honon scattering and interface roughness is developed. The result can capture the saturation on/off behaviors of GaAs Nanowire FETs. The phenomenon of energy relaxation and broadening due to inelastic scattering processes can also be observed.

Paper No.  2017-THU-P0301-P014
Wen-kuan Hsu Award Candidate Optimized Quantum-well-intermixing for EAM-SOA By Adjusting The Doping Level Of P-type Layer
Wen-kuan Hsu;Yi-Jen Chiu;Yang-Zen Chen;Rih-You Chen;Wei Lin

Impurity free vacancy disordering (IFVD) quantum-well-intermixing (QWI) with large p-doping offset layer is proposed for monolithic photonic integration. P-dopant diffusion is thus restricted during QWI, enhancing bandgap engineering. SOA-integrated EAM has been demonstrated, showing high speed and high modulation efficiency.

Paper No.  2017-THU-P0301-P015
Raul Amaury Robles Robles Award Candidate Work Extraction in Atom Field interactions
Raul Amaury Robles Robles;Ray-Kuang Lee

We analyze the conditions at which Work can be extracted in a quantum atomic-field interaction scheme. We show that the presence of quantum phase transitions can facilitate the extraction of work; however crossing the QPT does not guarantee extraction of work. We show that the RWA affects work extraction.