Browsing by Author "C. Teeka"

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    A comparison of gravitational acceleration measurement methods for undergraduate experiment
    (Institute of Physics Publishing, 2018) N. Suwanpayak; S. Sutthiyan; K. Kulsirirat; P. Srisongkram; C. Teeka; P. Buranasiri; N. Suwanpayak; Department of General Science, King Mongkut's Institute of Technology Ladkrabang, Prince of Chumphon Campus, Chumphon, Thailand; email: ksnathap@gmail.com
    This research aimed to determine the acceleration due to gravity (g), by using the methods of free fall, simple pendulum, physical pendulum and an Atwood's machine in the undergraduate laboratory. The experiments were designed for students to explore, analyze the data and interpreting the results by using the principle of a Physics laboratory. The mean experimental values of acceleration due to the gravity of free fall, simple pendulum, physical pendulum and the Atwood's machine were 9.64 m/s 2 , 9.67 m/s 2 , 10.88 m/s 2 and 10.47 m/s 2 , respectively. � Published under licence by IOP Publishing Ltd.
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    All-optical logic and and or gates generated by dark-bright soliton conversion
    (2013) P. Phongsanam; C. Teeka; R. Jomtarak; S. Mitatha; P.P. Yupapin; P.P. Yupapin; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: kypreech@kmitl.ac.th
    In this paper, a novel system of simultaneous optical logic AND and OR gates using dark-bright soliton conversion within the add/drop optical filter system is proposed. By using the dark-bright soliton conversion concept, the switching output signal response time of ns can be obtained. The input logic '0' and control logic '0' are formed by using the dark soliton pulse (D) trains. We found that the simultaneous optical logic AND and OR gates at the drop and through ports can be formed, respectively. The comparison data of the commercial system is also given, which is shown that the proposed system has the advantage over the commercial ones. © 2012 Elsevier GmbH. All rights reserved.
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    All-optical nanoscale microring device and system design for nano communication
    (Elsevier Ltd, 2012) N. Sangwaranatee; N.W. Sangwaranatee; C. Teeka; P.P. Yupapin; N. Sangwaranatee; Applied Physics, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok 10300, Thailand; email: narong_5@hotmail.com
    In this paper, we have shown that the two components (TE and TM waves) of polarized light are manipulated by using the orthogonal soliton pair within a PANDA ring resonator known as a dark-bright soliton pair. In operation, the orthogonal soliton sets can be generated by using the system. The optical field is fed into the ring resonator system, which is controlled by an optical switch by using a single microring. To form the initial spin states, the magnetic field is induced by an aluminum plate (Al) coupled on AlGaAs waveguides for optoelectronic spin-up and - down states. The optoelectronic spin is formed by using the TE and TM wave components. In this manipulation, the electromagnetic radiation is formed by using the orthogonal soliton pulses. In fact, they are photons, which behave like elementary particles. Hence, the spin axis of photon is always parallel to its direction of motion. Many orthogonal sets are also available and existed, in which the spin conservation of many particles is maintained for large scale system use. Therefore, for future applications, the use for high performance storage, low power magnetic logic, quantum logic, quantum gate, nano antenna, nano radio, and applications of spintronic sensing can be realized based on realistic device parameters. © 2010 Published by Elsevier Ltd.
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    All-optical switches based-on GaAs/AlAs quantum dots vertical cavities
    (Elsevier Ltd, 2012) C. Teeka; R. Jomtarak; P. P. Yupapin; C. Teeka; Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok, 10700, Thailand; email: chat_tee@dusit.ac.th
    In this paper, we present an all-optical switch based on self-assembled GaAs/AlAs quantum dots (QDs) within a vertical cavity. Two essential aspects of this novel device have been investigated, which includes the QD/cavity nonlinearity with appropriately designed mirrors and the intersubband carrier dynamics inside QDs. Verticalreflection- type switches have been investigated with an asymmetric cavity that consists of 12 periods of GaAs/Al0.8Ga0.2As for the front mirror and 25 periods for the back mirror. The thicknesses of the GaAs and AlGaAs layers are chosen to be 89 and 102 nm, respectively. To give a dot-in-a-well (DWELL) structure, 65nm dimension of Si was deposited within an 20nm AlAs QW. All-optical switching via the QD excited states has been achieved with a time constant down to 750 fs, wavelength tunability over 29.5 nm. These results demonstrate that QDs within a vertical cavity have great advantages to realize low-power consumption polarization-insensitive micrometer-sized switching devices for the future optical communication and signal processing systems. © 2010 Published by Elsevier Ltd.
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    ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm
    (2011) C. Teeka; S. Songmuang; R. Jomtarak; P.P. Yupapin; M.A. Jalil; I.S. Amiri; J. Ali; C. Teeka; Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok 10700, Thailand; email: chat_tee@dusit.ac.th
    We present a new concept of ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm by using OptiWave FDTD method. By microring resonator increase from one to three microring (SR to TR), we found that the amplitude shift keying (ASK) are increase exactly and the phase shift keying (PSK) is equal to ¹. © 2011 American Institute of Physics.
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    ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm
    (2011) C. Tanaram; C. Teeka; R. Jomtarak; P.P. Yupapin; M.A. Jalil; I.S. Amiri; J. Ali; C. Tanaram; Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand; email: tchanapk@gmail.com
    We present a new concept of ASK-to-PSK generation based on nonlinear microring resonators coupled to one MZI arm by using OptiWave FDTD method. By microring resonator increase from one to three microring (SR to TR), we found that the amplitude shift keying (ASK) are increase exactly and the phase shift keying (PSK) is equal to ¹.
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    Controllable FWM within a PANDA ring
    (Elsevier Ltd, 2012) W. Tupchiangmai; C. Teeka; W. Tupchiangmai; Department of Chemistry, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok, 10700, Thailand; email: w_chingmai@hotmail.com
    In this paper, we present the controllable four-wave mixing (FWM) within PANDA ring resonator based-on optical soliton manipulation. After a dark soliton pulse is fed into an input port of the resonator, the FWM can be formed within the system and detected simultaneously at the output ports. Under the resonant condition, the FWM can be controlled by adding Gaussian or bright soliton at the add port. Whenever a soliton(photon) is absorbed by an object, an angular momentum of either + h or -h is imparted to the object, in which two possible soliton states known as soliton spins are seen. In application, the controllable FWM can be used atom/photon manipulation. © 2010 Published by Elsevier Ltd.
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    Geometrically distributed 1D photonic crystals for light-reflection in all angles
    (Elsevier Ltd, 2012) R. Jomtarak; C. Teeka; P. P. Yupapin; R. Jomtarak; Nanoscale Science and Engineering Research Alliance (n'Sera), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: rangsan_jom@dusit.ac.th
    In this paper, we presented the general formulation of light reflection using a series of 1D PCs with different periods, made of non-absorptive materials of any refractive indices. In order to have a large bandgap - the spectral range of reflection, the periods of 1D PCs must be distributed in a geometrical progression with a common ratio, r, smaller than a maximum value of rc. The paper have presented exact expressions for rc, bandgap to mid gap ratio of the PC hetero-structure, and the minimum number of PCs to achieve the desired range of bandgap in single and all angles of incidence. The proposed method can be used to design filters for vast range of applications such as UV filters (i.e., sunglasses, eye safety glasses, UV photography filters) and visible light filters. © 2010 Published by Elsevier Ltd.
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    Geometrically distributed one-dimensional photonic crystals for all angle optical filters
    (2012) C. Teeka; S. Pipatsart; P.P. Yupapin; P.P. Yupapin; Nanoscale Science and Engineering Research Alliance (n'Sera), Faculty of Science, King Mongkut's Institute of Technology, Ladkrabang, Bangkok 10520, Thailand; email: kypreech@kmitl.ac.th
    We present the general formulation of light reflection using a series of one-dimensional (1D) photonic crystals (PCs) with different periods, which is made of nonabsorptive materials of any refractive indices.To have a large bandgap, the spectral range of reflection, the periods of 1D PCs must be distributed in a geometrical progression with a common ratio, r, smaller than a maximum value of r c. In this letter, the exact expressions for rc, the bandgap to mid gap ratio of the PC heterostructure and the minimum number of PCs to achieve the desired range of bandgap in single and all angles of incidence have been presented. The proposed method can be used to design the optical filters for vast range of applications such as ultraviolet (UV) filters (i.e., sunglasses, eye safety glasses, UV photography filters) and visible light filters. © 2012 Wiley Periodicals, Inc.
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    Optical soliton spin manipulation based-on AlGaAs/GaAs microring resonator
    (Elsevier Ltd, 2012) N. Sirikungwan; C. Teeka; N. Sirikungwan; Scientific Equipment Center, Faculty of Science and Technology, Suan Dusit Rajabhat University, Bangkok, 10700, Thailand; email: aumboon_j@hotmail.com
    In this paper, we present the optical soliton spin manipulation based-on a microring resonator. After a dark soliton pulse is fed into an input port of the microring, the orthogonal soliton pair (dark and bright solitons) can be formed within the system and detected simultaneously at the output ports. Under the resonant condition, the conversion of dark and bright solitons corresponding to the left-hand and right hand soliton orientations can be generated and seen. Whenever a soliton(photon) is absorbed by an object, an angular momentum of either + h or -h is imparted to the object, in which two possible soliton states known as soliton spins are exhibited and confirmed by the helical phase presentation. In application, the train of orthogonal solitons, i.e. many solitons (photons) with slightly different wavelengths can be generated by using the modified add-drop filter, which is available for many soliton spin investigations. © 2010 Published by Elsevier Ltd.
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    Single electron-hole pair generation using dark-bright solitons conversion control
    (2011) R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; R. Jomtarak; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: rangsan_jom@dusit.ac.th
    In this paper, we present the new concept of single electron-hole pair generation by using dark-bright solitons conversion control based on microring resonator coupled to one arm MZI. By using some suitable parameters and found that the single electron-hole pair are seen, therefore, the single electron-hole pair generate can be storage and controll within the design system. © 2011 American Institute of Physics.
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    Single electron-hole pair generation using dark-bright solitons conversion control
    (2011) S. Punthawanunt; R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; S. Punthawanunt; Faculty of Science and Technology, Kasem Bundit University, Bangkok 10250, Thailand; email: suphanchai@kbu.ac.th
    In this paper, we present the new concept of single electron-hole pair generation by using dark-bright solitons conversion control based on microring resonator coupled to one arm MZI. By using some suitable parameters and found that the single electron-hole pair are seen, therefore, the single electron-hole pair generate can be storage and controll within the design system.
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    Single electron-hole pair generation using dark-bright solitons conversion control
    (2010) R. Jomtarak; C. Teeka; P.P. Yupapin; J. Ali; R. Jomtarak; Advanced Research Center for Photonics, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: rangsan_jom@dusit.ac.th
    Recently, the electron-hole pair generated in 1.06-_m separate-absorber-avalanche (multiplier) InP-based devices [1], SiGe/Si planar waveguides [2] fabricated with a Ge concentration ranging from 2% to 6% and different thicknesses ranging from 200 nm to 2 _m, generating electron-hole pairs with a 100 fs laser pulse emitted at 810 nm, and monitoring the free-carrier absorption transient with a c.w. probe beam at 1.55 _m, bipolar transistors [3], CMOS process [4], InAs-GaSb superlattice (SL) photodiodes [5], resonant microcavity [6], A cavity-QED using a single InAs quantum dot and a high-Q whispering gallery mode [7]. ©2010 IEEE.
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    SOLITON SPIN in AN ADD-DROP OPTICAL FILTER for LONG DISTANCE SPIN TRANSPORT
    (World Scientific Publishing Co. Pte Ltd, 2012) C. Teeka; M.S. Aziz; S. Pipatsart; K. Srinuanjan; J. Ali; P.P. Yupapin
    A new concept of an optical spin generation using bright and dark soliton conversion behaviors within a modified optical add-drop filters known as a PANDA ring resonator is proposed. The orthogonal solitons can be formed randomly within the system and detected simultaneously at the output ports. Under the resonant condition, the orthogonal solitons corresponding to the left-hand and right-hand solitons (photons) can be generated. Whenever a photon is absorbed by an object, an angular momentum of either + _ or - _ is imparted to the object, in which two possible spin states known as soliton spins are exhibited. Many soliton spins, i.e., many particles, dynamic spin and long distance spin transport using the proposed design are also discussed. © 2012 World Scientific Publishing Company.
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    Soliton spin manipulation using an optical add-drop filter
    (2012) S. Mitatha; S. Glomglome; C. Teeka; P.P. Yupapin; P.P. Yupapin; Nanoscale Science and Engineering Research Alliance (n'Sera), Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; email: kypreech@kmitl.ac.th
    By using the optical add-drop filter which is formed by a microring resonator.After a dark soliton pulse is fed into an input port of the add-drop filter, the orthogonal soliton pair (dark and bright solitons) can be formed within the system and detected simultaneously at the output ports. Under the resonant condition, the conversion of dark and bright solitons corresponding to the left-hand and right hand soliton orientations can be generated and seen. Whenever a soliton(photon) is absorbed by an object, an angular momentum of either +h or -h is imparted to the object, in which two possible soliton states known as soliton spins are exhibited and confirmed by the helical phase presentation. In application, the train of orthogonal solitons, that is, many solitons (photons) with slightly different wavelengths can be generated by using the modified add-drop filter, which is available for many soliton spin investigations. © 2012 Wiley Periodicals, Inc.
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    Spin-polarization array generation for spin transport use
    (2011) S. Mitatha; W. Sangiamsak; K. Kulsirirat; C. Teeka; P.P. Yupapin
    Spin-polarization can be formed by the two components of soliton (electromagnetic wave) within the metallic waveguide. Under the resonant condition, the random transverse electric and magnetic fields of the solitons corresponding to the left-hand and right hand photons can be generated. Whenever a photon is absorbed by an object, an angular momentum of either +_ or -_ is imparted to the object, in which two possible spin states known as optoelectronic spins are exhibited. Furthermore, the array of optoelectronic spins, i.e., many particles can be generated and controlled by using the modified add-drop filter, in which the broad spectrum soliton can be generated and used to form large scale spin transport applications. © 2011 World Scientific Publishing Company.