KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Search Results

Now showing 1 - 10 of 121

Some of the metrics are blocked by your
consent settings
Capacitance-voltage (c-v) characteristic effect of pt atom power device
(2016-06-01)
Sangwaranatee, Narong
;
Srithanachai, Itsara
;
Yupapin, Preecha P.
As Pt atoms may create problem into the surface and junction of the power device, the paper investigates the effect of Pt atoms in thermal annealing (TA) process for various temperature environments. Though experiments, the comparison between un-doped and Pt-doped results for 850 °C and 900 °C has been made. As per results obtained Pt atoms can be deeply diffused to the silicon bulk after the TA 2 process. While before this process, the Pt diffusion range was recorded to be 4,500A. It was found that there was no significant change in C-V characteristics of Pt-doped, when the Vbi of 0.4-0.5eV got achieved. Thus, the Pt atoms contact type is not changed and the carrier concentration is confirmed due to effect that Pt may induce trap or cluster that can reduce the power device carrier concentration.
Some of the metrics are blocked by your
consent settings
Power device impact using pt-doped on i-v characteristics
(2016-06-01)
Sangwaranatee, Narong
;
Srithanachai, Itsara
;
Yupapin, Preecha P.
We investigate the influence of Pt-doped in the power device, where the power device has been fabricated by using CMOS technology. Pt has high diffusion coefficient in the semiconductor material and Pt atom that can be used to reduce the device switching time. On the other hand, it may induce defects in device mechanism. The results obtained show that the Pt can penetrate into the silicon structure of 3,700A (before RTA process) by using the ion implantation 120keV. The Pt-doped device has shown the higher forward current of order 1. The goal of this experiment is to investigate the effect of Pt-doping on electrical characteristics of the power device.
Some of the metrics are blocked by your
consent settings
Monitoring of traffic using unmanned aerial vehicle in malaysia landscape perspective
(2016-03-01)
Ahmad Noorden, Ahmad Fakhrurrazi
;
Daud, Suzairi
;
Haider Rizvi, Syed Zuhaib
;
Ali, Jalil
;
Yupapin, Preecha P.
The theoretical investigation has been performed on the implementation of optical Mobius shape in add-drop microring resonator. The modified add-drop Mobius configuration is used to investigate the optical bistability and the spectral transmission. The optical bright soliton pulse is used as the input source of the resonator system. The pulses propagation of the resonator system is modelled using the iterative programming based on the transfer matrix analysis equations. The enhancement of nonlinear effect of the resonator system is achieved by the add-drop Mobius resonator configuration. The system has been modelled for a variation of coupling coefficient for increase the bistable signal properties. The Add-drop Mobius MRR generated a bistable signal with 6.01 mW hysteresis width, and 9.47 mW output switch power with optimized radius of 5 μm outer and 4.5 m inner ring parts with 50 mW controlled power and input power. Mobius configuration is found as the better shape of resonator cavity that capable of optical switching application.
Some of the metrics are blocked by your
consent settings
Remote artificial eyes using micro-optical circuit for long-distance 3D imaging perception
(2016-01-01)
Thammawongsa, Nopparat
;
Yupapin, Preecha P.
A small-scale optical device incorporated with an optical nano-antenna is designed to operate as the remote artificial eye using a tiny conjugate mirror. A basic device known as a conjugate mirror can be formed using the artificial eye device, the partially reflected light intensities from input source are interfered and the 3D whispering gallery modes formed within the ring centers, which can be modulated and propagated to the object. The image pixel is obtained at the center ring and linked with the optic nerve in the remote area via the nano-antenna, which is useful for blind people.
Some of the metrics are blocked by your
consent settings
Molecular transport network security using multi-wavelength optical spins
(2016-01-01)
Tunsiri, Surachai
;
Thammawongsa, Nopparat
;
Mitatha, Somsak
;
Yupapin, Preecha P.
Multi-wavelength generation system using an optical spin within the modified add-drop optical filter known as a PANDA ring resonator for molecular transport network security is proposed. By using the dark-bright soliton pair control, the optical capsules can be constructed and applied to securely transport the trapped molecules within the network. The advantage is that the dark and bright soliton pair (components) can securely propagate for long distance without electromagnetic interference. In operation, the optical intensity from PANDA ring resonator is fed into gold nano-antenna, where the surface plasmon oscillation between soliton pair and metallic waveguide is established.
Some of the metrics are blocked by your
consent settings
Modified add-drop microring resonator for temperature sensing
(2015-10-01)
Mohamad, Azam
;
Bahadoran, Mahdi
;
Noorden, Ahmad Fakhrurrazi Ahmad
;
Aziz, Safwan
;
Chaudhary, Kashif
A micro resonating sensor is proposed for simultaneous measurement of temperature and carrier density using modified Add-drop resonator called PANDA resonator from silicon-on-insulator (SOI) material waveguide. The proposed sensor works by observing the concentration of free-carrier in silicon around room temperature yielding the sensitivity of 1×1023 m-3 C-1 with limit of detection of 10-5 C. It is found that the output intensity decreases due to the photon and thermal absorptions. It is found that the performance of the PANDA sensor is affected by the power at the first coupling region and increase in propagating lengths of PANDA sensor causes a nonlinear effect in carrier density production.
Some of the metrics are blocked by your
consent settings
Multi-wavelength Čerenkov radiations in a microring resonator in combination with two gratings
(2015-07-25)
Jomtarak, Rangsan
;
Yupapin, Preecha P.
In this paper, the Čerenkov radiation of light pulse in a microring and gratings is simulated and investigated. The system design consists of a two-defect grating incorporating a microring, connected with a uniform grating. In simulation, the continuous wave (CW) light pulse with wavelength centered at 1.55 μm is input into the microring device via the two-defect grating. The resonant outputs from the two-defect grating propagate through the microring and uniform grating, where the time delays of those two input pulses with different wavelengths through the system are distinguished by the output uniform grating. From the obtained resonant output pulses, we find that the red-shifted and blue-shifted Čerenkov pulses are observed. In applications, such a proposed system can be used to form two different optical delay pulses, in which the change in Čerenkov radiation of them, i.e., time delay within a microring device system, can be useful for Čerenkov radiation imaging and sensing applications.
Some of the metrics are blocked by your
consent settings
A single eye 3D image perception device using vertical double ring resonator construction
(2015-08-01)
Saktioto, T.
;
Irawan, D.
;
Yupapin, Preecha P.
;
Phatharacorn, Prateep
A single eye three-dimensional (3D) imaging perception using a single 3D imaging pixel is designed and manipulated, which is the interesting device configuration that can be used for various applications. The device configuration is consisted of double conjugate mirrors that can be vertically fabricated, which can be used to form the 3D image using a single pixel configuration, from which the large area device construction is also possible. By adjusting the microconjugate mirror parameters, then the matching between both microconjugate mirrors can lead to obtain the required 3D images. Results obtained have shown that the 3D image outputs can be achieved and used for 3D pixel imaging. The 3D image output can be confirmed by the four-wave mixing output balancing profile, which is achieved. In applications, the large area 3D images can be constructed using the large area 3D imaging device, from which the large area can be coverage by the microconjugate mirror array, which can be useful for various applications.
Some of the metrics are blocked by your
consent settings
Doppler shift velocimetry using two point probe nested-microring resonators
(2015-03-05)
Jomtarak, Rangsan
;
Yupapin, Preecha P.
;
Ali, Jalil
In this paper, a micro Doppler shift velocimeter using two nested-microring resonators incorporating two gratings is designed and simulated. Two wavelength light pulse can be generated by a single input wavelength source after travelling through the two defect grating. Whispering gallery mode of light pulses are localized within the nested-microring resonators, which can be used to form the two point probe Doppler shift velocimeter. The shifted frequency (velocity) can be obtained by the difference of optical path length between two point probes, where the relative velocity of Doppler frequency shift velocimeter can be obtained. The light absorption behaviors can also be investigated by the different light output spectrum. The obtained simulation results shows that the relative velocities of the reflection and transmission light intensities are ranged from 10<sup>4</sup> m/s to 10<sup>5</sup> m/s, which can be useful for Doppler frequency shift velocimeter and sensors, where the micro-optical device and multi-functions are the advantages.
Some of the metrics are blocked by your
consent settings
Drug targeting model of composite gold-tourmaline for cells enhancing applications
(2015-01-01)
Yupapin, Preecha P.
;
Suwandee, Senee
The drug delivery and targeting method of gold tourmaline composite atoms generated by optical tweezers in a micro-optical device system is proposed. Gold atoms can be trapped and mixed into the tourmaline content, from which the composite gold tourmaline atoms can be formed using the optical tweezers, which can be delivered close to the desired target cells for cells healing and enhancing applications. In simulation, the optical tweezers are formed by whispering gallery (leaky) modes of light can be generated within a modified add-drop filter, which is known as a Panda ring resonator. It is a nonlinear micro optical device, from which the optical probes called optical tweezers can be generated and used for atom trapping, removing and transportation. In this paper, the optical tweezers are designed for gold tourmaline composite atom trapping, in which the trapped gold tourmaline atoms can be deposited (removed) on (from) the surface for cosmetics and cells enhancing treatment usages. The advantage of the proposed scheme is that the applied (removed) atoms to (from) the surface treatments by the designed trapping and storage device, where the device controlled switching is the key function. In application, the composite trapped gold-tourmaline atoms can be stored with the storage device. In addition, the removal trapped gold-tourmaline atoms can be removed from the treatment surface, from which the used gold atoms can be possible extracted and reused. The cells enhancing and healing applications using the tourmaline properties such as magnetic and far infrared are also plausible.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results