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Lorenzo Lopez

University of the Philippines Diliman

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Featured researches published by Lorenzo Lopez.

Optics Letters | 2016

Terahertz emission enhancement in semi-insulating gallium arsenide integrated with subwavelength one-dimensional metal line array

Maria Angela Faustino; Lorenzo Lopez; Jessica Afalla; Joselito Muldera; Nathaniel Hermosa; Arnel Salvador; Armando Somintac; Elmer Estacio

A one-order-of-magnitude terahertz (THz) emission enhancement in the transmission geometry, over a 0.7-THz broadband range, was observed in semi-insulating gallium arsenide (SI-GaAs) integrated with a subwavelength one-dimensional metal line array (1DMLA). THz emission of the 1DMLA samples showed an intensity increase and exhibited a full-width-at-half-maximum broadening relative to the emission of the bare substrate. Improved index matching could not account for the observed phenomenon. A nonlinear dependence of the integrated THz emission intensity on the number of illuminated lines and on the pump power was observed. The actual origin of the increased THz emission is still under investigation. At present, it is attributed to extraordinary optical transmission.

conference on lasers and electro optics | 2015

Enhanced terahertz emission from SI-GaAs with a sub-wavelength 1D metal array

Maria Angela Faustino; Lorenzo Lopez; Jessica Afalla; Joselito Muldera; Mark Jayson Felix; Arnel Salvador; Armando Somintac; Elmer Estacio

Terahertz emission enhancement in SI-GaAs, having a deposited periodic 1D metal array, is reported. The one order enhancement is currently attributed to the localization of the terahertz electromagnetic field at the GaAs apertures.

Proceedings of the Samahang Pisika ng Pilipinas | 2018

Drift-diffusion in InAs based on ambipolar transport

Deborah Lumantas; Alexander De Los Reyes; Joselito O. Muldera; Lorenzo Lopez; Armando Somintac; Arnel Salvador; Elmer Estacio

Proceedings of the Samahang Pisika ng Pilipinas | 2018

Temperature-dependent photoluminescence and terahertz time-domain spectroscopy of single-layered InAs/GaAs quantum dots grown via molecular beam epitaxy

Alexander De Los Reyes; John Daniel Vasquez; Lorenzo Lopez; Hannah R. Bardolaza; Che-yu Chang; Der-jun Jang; Armando Somintac; Arnel Salvador; Elmer Estacio

Optical Materials Express | 2018

Intense THz emission in high quality MBE-grown GaAs film with a thin n-doped buffer

Elizabeth Ann Prieto; Sheryl Ann B. Vizcara; Lorenzo Lopez; John Daniel Vasquez; Maria Herminia Balgos; Daisuke Hashizume; Norihiko Hayazawa; Yousoo Kim; Masahiko Tani; Armando Somintac; Arnel Salvador; Elmer Estacio

Proceedings of the Samahang Pisika ng Pilipinas | 2017

Terahertz transmission of soil samples excavated from Pinagbayanan, San Juan, Batangas

Maria Angela Faustino; Lorenzo Lopez; Neil Irvin Cabello; Alexander De Los Reyes; Arven Cafe; Catherine Tugado; Vito Paolo C. Hernandez; Grace Barretto-Tesoro; Elmer Estacio

Proceedings of the Samahang Pisika ng Pilipinas | 2017

Investigation of porosity effects in the photoluminescence and terahertz emission of electrochemically synthesized silicon nanostructures

Neil Irvin Cabello; Philippe Martin B. Tingzon; Kerr Cervantes; Joybelle Lopez; Arven Cafe; Lorenzo Lopez; Joselito Muldera; Arnel Salvador; Elmer Estacio; Armando Somintac

Proceedings of the Samahang Pisika ng Pilipinas | 2017

Terahertz emission characteristics of semi-insulating, zinc and manganese-doped gallium arsenide films

Alexander De Los Reyes; Elizabeth Ann Prieto; Karim Omambac; Lorenzo Lopez; Karl Cedric Gonzales; Joselito Muldera; Kohji Yamamoto; Masahiko Tani; Armando Somintac; Elmer Estacio; Arnel Salvador

Proceedings of the Samahang Pisika ng Pilipinas | 2017

Investigation on the interface electric field of aluminum-doped zinc oxide/p-type gallium arsenide (AZO/p-GaAs) heterojunctions for terahertz emission applications

Erick John Carlo Solibet; Archel Susvilla Escaro; Lorenzo Lopez; Angela Faustino; Hannah Rillera; Neil Irvin Cabello; Alexander De Los Reyes; Elmer Estacio; Armando Somintac; Arnel Salvador

Proceedings of the Samahang Pisika ng Pilipinas | 2017

Photocarrier dynamics in GaAs/AlGaAs modulation-doped heterostructure from temperature-dependent terahertz time domain emission spectroscopy and photoreflectance spectroscopy

Hannah R. Bardolaza; John Daniel Vasquez; Miguel Bacaoco; Alexander De Los Reyes; Lorenzo Lopez; Armando Somintac; Arnel Salvador; Elmer R. Estacio; Roland V. Sarmago

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Armando Somintac

University of the Philippines Diliman

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Arnel Salvador

University of the Philippines Diliman

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Elmer Estacio

University of the Philippines Diliman

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Alexander De Los Reyes

University of the Philippines Diliman

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Joselito Muldera

De La Salle University

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Arven Cafe

University of the Philippines Diliman

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Maria Angela Faustino

University of the Philippines Diliman

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Masahiko Tani

University of Fukui

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John Daniel Vasquez

University of the Philippines Diliman

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Joybelle Lopez

University of the Philippines Diliman

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